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Glucose, an abundant and renewable form of biomass, has garnered significant attention in research for its conversion into high‐value chemicals such as gluconic acid. Traditional methods for biomass transformation typically involve high energy input, elevated temperature, pressure, and costly systems. In contrast, photocatalysis emerges as a promising approach to produce organic molecules under mild conditions, harnessing energy from natural sunlight or lamps. This study presents the nitrogen‐enriched graphene with zeolite second Mobil–5 (NenG/ZSM‐5) photocatalyst, evaluated for generating high‐value chemicals (gluconic acid and leucodopaminechrome) under solar light irradiation. The NenG/ZSM‐5 photocatalyst, synthesized from nitrogen‐doped graphene and ZSM‐5, successfully converted dopamine into leucodopaminechrome (71.54 %) — a critical step in dopamine regeneration and transformed glucose into gluconic acid (85 %). The addition of ZSM‐5 to NenG provided stability and enhanced product selectivity. The outstanding performance of the NenG/ZSM‐5 photocatalyst can be attributed to its heightened solar light harvesting potential, appropriate energy band gap, and uniformly arranged π‐electron channels. This research focuses on solar conversion of glucose to gluconic acid and dopamine regeneration, with potential for further exploration in the research domain. [ABSTRACT FROM AUTHOR]

Nicotinamide Adenine Dinucleotide Phosphate (NAD(P)H) plays an important role in numerous biologically significant redox reactions. The photochemical restoration of its oxidized form (NAD(P)+) under physiological conditions is intriguing in the context of integrated photo and catalysis. Herein, we report the functionalized graphitic carbon‐based solar light active photocatalyst by doping boron and fluorine in the native graphitic carbon nitride (GCN) (nonfunctionalized) for the regeneration of enzymatically visible light active coenzyme and in photo‐acetalization reactions. The metal‐free functionalized photocatalyst systems such as BFGCN‐x leads to higher yield NADH and NADPH regeneration. They are also capable of catalyzing acetal reactions in the absence of any Lewis and Bronsted acids. The current research endeavor provides the advancement and the application of functionalized GCN‐based photocatalysts for NADH (61.89%), NADPH (59.84%) regeneration, and photo‐acetalization reactions. [ABSTRACT FROM AUTHOR]

Elevated global pollution level is the prime reason that contributes to the onset of various harmful health diseases. The products of Biginelli reaction are enormously used in the pharmaceutical industry as they have antiviral, antibacterial, and calcium channel modulation abilities. This work reports a novel eosin Y sensitized boron graphitic carbon nitride (EY‐Ben‐g‐C3N4) as a photocatalyst that efficiently produced 3,4‐dihydropyrimidine‐2‐(1H)‐one by the Biginelli reaction of benzaldehyde, urea, and methyl acetoacetate. The photocatalyst EY‐Ben‐g‐C3N4 showed a successful generation of 3,4‐dihydropyrimidine‐2‐(1H)‐one (Biginelli product) in good yield via photocatalysis which is an eco‐friendly method and has facile operational process. In addition to the production of Biginelli products, the photocatalyst also showed a remarkable NADH regeneration of 81.18%. The incorporation of g‐C3N4 with boron helps increase the surface area and the incorporation of eosin Y which is an inexpensive and non‐toxic dye, and in Ben‐g‐C3N4, enhanced the light‐harvesting capacity of the photocatalyst. The production of 3,4‐dihydropyrimidine‐2‐(1H)‐one and NADH by the EY‐Ben‐g‐C3N4 photocatalyst is attributed to the requisite band gap, high molar absorbance, low rate of charge recombination, and increased capacity of the photocatalyst to harvest solar light energy. [ABSTRACT FROM AUTHOR]

The combination of excellent electronic properties and thermal stability positions orange‐derived graphene quantum dots (GQDs) as promising materials for solar light‐based applications. Researchers are actively exploring their potential in fields such as photovoltaics, photocatalysis, optoelectronics, and energy storage. Their abundance, cost‐effectiveness, and eco‐friendly nature further contribute to their growing relevance in cutting‐edge scientific research. Furthermore, only GQDs are not much more effective in the UV‐visible region, therefore, required band gap engineering in GQDs material. In this context, we designed GQDs‐based light harvesting materials, which is active in UV‐visible region. Herein we synthesized GQDs coupled with 2,6‐diaminoanthrquninone (AQ), that is, GQDs@AQ light harvesting photocatalyst the first time for the oxidation of sulfide to sulfoxide under visible light. For the integrating reactions of sulfide in aerobic conditions under visible light by GQDs@AQ photocatalyst exhibit utmost higher photocatalytic activity than simple GQDs due to low molar extinction coefficient and slow recombination charges. The use of GQDs@AQ light harvesting photocatalyst, showed the excellent organic transformation efficiency of sulfide to sulfoxide with excellent yield (94%). The high efficiency and excellent yield of 94% indicate the effectiveness of GQDs@AQ as a photocatalyst for these specific organic transformations. [ABSTRACT FROM AUTHOR]

Fluorinated and enzymatic chemicals are widely used in society due to their chemical, physical, and biological qualities. Nevertheless, despite their vital importance, present approaches to adding fluorine to molecules and regenerating enzyme cofactors have serious flaws. For instance, numerous approaches are photocatalytic and employ stoichiometric counterparts of heavy metals. Prevailing photocatalytic approaches, on the other hand, show very poor activity, and selectivity has not been attained by heterogeneous photocatalysis, despite the several benefits such a method would provide. Here, we show how heterogeneous photocatalysis may be used to selectively create C(sp3)‐F bonds and 1,4‐NADH regeneration cofactor. Employing NiS‐NiO/S‐g‐C3N4 nanocomposite photocatalyst as a photocatalyst, NAD+ and Selectfluor as an acceptor and mild fluorine donor, effective 1,4‐NADH regeneration, and decarboxylative fluorination of carboxylic acids can be attained in very short reaction times. Furthermore, NiS‐NiO/S‐g‐C3N4 nanocomposite photocatalyst exhibits outstanding levels of robustness and photo‐catching capacity. These aspects, attached to the mild environment of the reaction scheme, exhibit a breakthrough toward the sustainable cofactor of 1,4‐NADH regeneration and synthesis of fluorinated compounds. [ABSTRACT FROM AUTHOR]

Aloe vera‐derived graphene (ADG) coupled system photocatalyst, mimicking natural photosynthesis, is one of the most promising ways for converting solar energy into ammonia (NH3) and nicotinamide adenine dinucleotide (NADH) that have been widely used to make the numerous chemicals such as fertilizer and fuel. In this study, we report the synthesis of the aloe vera‐derived graphene‐coupled phenosafranin (ADGCP) acting as a highly efficient photocatalyst for the generation of NH3 and regeneration of NADH from nitrogen (N2) and oxidized form of nicotinamide adenine dinucleotide (NAD+). The results show a benchmark instance for mimicking natural photosynthesis activity as well as the practical applications for the solar‐driven selective formation of NH3 and the regeneration of NADH by using the newly designed photocatalyst. [ABSTRACT FROM AUTHOR]

Melanoma and nonmelanoma skin cancers are among the most prevalent and most lethal forms of skin cancers. To identify new lead compounds with potential anticancer properties for further optimization, in vitro assays combined with in‐silico target fishing and docking have been used to identify and further map out the antiproliferative and potential mode of action of molecules from a small library of compounds previously prepared in our laboratory. From screening these compounds in vitro against A375, SK‐MEL‐28, A431, and SCC‐12 skin cancer cell lines, 35 displayed antiproliferative activities at the micromolar level, with the majority being primarily potent against the A431 and SCC‐12 squamous carcinoma cell lines. The most active compounds 11 (A431: IC50 = 5.0 μM, SCC‐12: IC50 = 2.9 μM, SKMEL‐28: IC50 = 4.9 μM, A375: IC50 = 6.7 μM) and 13 (A431: IC50 = 5.0 μM, SCC‐12: IC50 = 3.3 μM, SKMEL‐28: IC50 = 13.8 μM, A375: IC50 = 17.1 μM), significantly and dose‐dependently induced apoptosis of SCC‐12 and SK‐MEL‐28 cells, as evidenced by the suppression of Bcl‐2 and upregulation of Bax, cleaved caspase‐3, caspase‐9, and PARP protein expression levels. Both agents significantly reduced scratch wound healing, colony formation, and expression levels of deregulated cancer molecular targets including RSK/Akt/ERK1/2 and S6K1. In silico target prediction and docking studies using the SwissTargetPrediction web‐based tool suggested that CDK8, CLK4, nuclear receptor ROR, tyrosine protein‐kinase Fyn/LCK, ROCK1/2, and PARP, all of which are dysregulated in skin cancers, might be prospective targets for the two most active compounds. Further validation of these targets by western blot analyses, revealed that ROCK/Fyn and its associated Hedgehog (Hh) pathways were downregulated or modulated by the two lead compounds. In aggregate, these results provide a strong framework for further validation of the observed activities and the development of a more comprehensive structure–activity relationship through the preparation and biological evaluation of analogs. [ABSTRACT FROM AUTHOR]

A solvent‐free sulfur‐bridge‐eosin‐Y (SBE‐Y) polymeric framework photocatalyst was prepared for the first time through an in situ thermal polymerization route using elemental sulfur (S8) as a bridge. The addition of a sulfur bridge to the polymeric framework structure resulted in an allowance of the harvesting range of eosin‐Y (E‐Y) for solar light. This shows that a wider range of solar light can be used by the bridge material's photocatalytic reactions. In this context, supercharged solar spectrum: enhancing light absorption and hole oxidation with sulfur bridges. This suggests that the excited electrons and holes through solar light can contribute to oxidation–reduction reactions more potently. As a result, the photocatalyst‐enzyme attached artificial photosynthesis system developed using SBE‐Y as a photocatalyst performs exceptionally well, resulting in high 1,4‐NADH regeneration (86.81%), followed by its utilization in the exclusive production of formic acid (210.01 μmol) from CO2 and synthesis of fine chemicals with 99.9% conversion yields. The creation of more effective photocatalytic materials for environmental clean‐up and other applications that depend on the solar light‐driven absorption spectrum of inorganic and organic molecules could be one of the practical ramifications of this research. [ABSTRACT FROM AUTHOR]

The photocatalytic oxidation and generation/regeneration of amines to imines and leucodopaminechrome (LDC)/NADH are subjects of intense interest in contemporary research. Imines serve as crucial intermediates for the synthesis of solar fuels, fine chemicals, agricultural chemicals, and pharmaceuticals. While significant progress has been made in developing efficient processes for the oxidation and generation/regeneration of secondary amines, the oxidation of primary amines has received comparatively less attention until recently. This discrepancy can be attributed to the high reactivity of imines generated from primary amines, which are prone to dehydrogenation into nitriles. In this study, we present the synthesis and characterization of a novel polymer‐based photocatalyst, denoted as PMMA‐DNH, designed for solar light‐harvesting applications. PMMA‐DNH incorporates the light‐harvesting molecule dinitrophenyl hydrazine (DNH) at varying concentrations (5%, 10%, 20%, 30%, and 40%). Leveraging its high molar extinction coefficient and slow charge recombination, the 30% DNH‐incorporated PMMA photocatalyst proves to be particularly efficient. This photocatalytic system demonstrates exceptional yields (96.5%) in imine production and high generation/regeneration rates for LDC/NADH (65.27%/78.77%). The research presented herein emphasizes the development and application of a newly engineered polymer‐based photocatalyst, which holds significant promise for direct solar‐assisted chemical synthesis in diverse commercial applications. [ABSTRACT FROM AUTHOR]

Sulfur‐doped Eosin‐B (SDE‐B) photocatalysts were synthesized for the first time utilizing sublimed sulfur (S8) as a dopant in an in situ thermal copolymerization technique. Sulfur doping not only increased Eosin‐B (E‐B) absorption range for solar radiation but also improved fixation and oxygenation capabilities. The doped sulfur bridges the S‐S bond by substituting for the edge bromine of the E‐B bond. The improved photocatalytic activity of SDE‐B in the fixation and oxygenation of NAD+/NADP+ and sulfides using solar light is attributed to the photo‐induced hole of SDE‐B's high fixation and oxygenation capacity, as well as an efficient suppression of electron and hole recombination. The powerful light‐harvesting bridge system created using SDE‐B as a photocatalyst works extremely well, resulting in high NADH/NADPH regeneration (79.58/76.36%) and good sulfoxide yields (98.9%) under solar light. This study focuses on the creation and implementation of a sulfur‐doped photocatalyst for direct fine chemical regeneration and organic transformation. [ABSTRACT FROM AUTHOR]

Photocatalysis is one of the most promising methods for producing organic compounds with a renewable source of energy. Two‐dimensional covalent organic frameworks (2D COFs) are a type of polymer that has developed as a potential light‐harvesting catalyst for artificial photosynthesis with a design‐controllable platform that might be developed into a new type of cost‐effective and metal‐free photocatalyst. Here, we present a two‐dimensional covalent organic framework synthesis technique as a low‐cost and highly efficient visible light active flexible photocatalyst for C–H bond activation and dopamine regeneration. 2D COF were synthesized from tetramino‐benzoquinone (TABQ) and terapthaloyl chloride monomer through condensation polymerization reaction and the resultant photocatalyst have remarkable performance due to its visible light‐harvesting capacity, appropriate band gap, and highly organized π‐electron channels. The synthesized photocatalyst is capable to convert dopamine into leucodopaminechrome with a higher yield (77.08%) and also capable to activate the C–H bond between 4‐nitrobenzenediazonium tetrafluoroborate and pyrrole. [ABSTRACT FROM AUTHOR]

Photocatalytic processes triggered by graphene‐based photocatalysts under solar light have sparked interest as a new sort of instrument for solar chemical synthesis. Herein we investigated self‐assembled graphene quantum dots (GQDs)/NiSe‐NiO composite photocatalyst for organic transformation as well as dye degradation. The synthesized GQDs/NiSe‐NiO composite photocatalyst has an excellent suitable band gap, high molar extinction coefficient, low toxicity and chemical/thermal stability. The GQDs/NiSe‐NiO composite photocatalyst emerges as a new standard for sulfur oxidation and dye degradation reactions under homemade LED light with high yield. [ABSTRACT FROM AUTHOR]

Photocatalysis is a defendable manner for production of several organic chemicals, energy and its storage from solar energy. For the evolution of metal free, cost‐effective catalyst a 2D composite has been appear as a photocatalyst. Here, we had reported the synthesis of a light harvesting composite as a photocatalyst which was assembled by a poly‐condensation mechanism between graphitic carbon nitride and tetrakis(4‐nitrophenyl) porphyrin and the resulting composite manifest the excellent light harvesting properties, suitable energy band and low charge recombination. The photocatalyst [(NO2)4TPP@g‐C3N4] enables the efficient photocatalytic production of nicotinamide adenine dinucleotide (NADH) from consumed NAD+ also the production of organic chemicals like 4‐methoxybenzylimines from 4‐methoxybenzylamines. The photocatalytic efficiency of the photocatalyst was estimated by the percentage of NADH regeneration and the percentage yield of organic transformations. It shows the tetrakis(4‐nitrophenyl) porphyrin could enhance the charge transfer capacity of graphitic carbon nitride which shows excellent photocatalysis activities and organic transformations. [ABSTRACT FROM AUTHOR]

To minimize the ever‐increasing global warming and environmental problems, the conversion of atmospheric CO2 into value‐added solar chemicals/fuels is one of the most challenging tasks. As a means to accomplish this, herein we have synthesized first time novel in situ selenium‐doped polyimide frameworks (Se‐PIFs) photocatalyst via thermal co‐polymerization approach between melem (M) and perylene 3, 4, 9, 10‐tetracarboxylic dianhydride (PTDA) along with selenium (Se) as a dopant. The Se‐PIFs photocatalyst shows outstanding photocatalytic stability and activity for high solar fuel production (HCOOH ~ formic acid) from CO2. The solar light active Se‐PIFs photocatalyst was demonstrating the ~ 10‐fold higher photo‐conversion of CO2 to formic acid with yields of 250. 6 μmol. The current work is providing a facile and scalable avenue as well as sheds light on creating a new route for in situ judicious design highly efficient Se‐PIFs photocatalyst. The outcome is a benchmark instance for the use of selenium‐doped polyimide frameworks as a highly practical and efficient solar light active photocatalyst for carrying out the selective production of formic acid from environmental CO2. [ABSTRACT FROM AUTHOR]

To minimize the ever‐increasing global warming and environmental problems, the conversion of atmospheric CO2 into value‐added solar chemicals/fuels is one of the most challenging tasks. As a means to accomplish this, herein we have synthesized first time novel in situ selenium‐doped polyimide frameworks (Se‐PIFs) photocatalyst via thermal co‐polymerization approach between melem (M) and perylene 3, 4, 9, 10‐tetracarboxylic dianhydride (PTDA) along with selenium (Se) as a dopant. The Se‐PIFs photocatalyst shows outstanding photocatalytic stability and activity for high solar fuel production (HCOOH ~ formic acid) from CO2. The solar light active Se‐PIFs photocatalyst was demonstrating the ~ 10‐fold higher photo‐conversion of CO2 to formic acid with yields of 250. 6 μmol. The current work is providing a facile and scalable avenue as well as sheds light on creating a new route for in situ judicious design highly efficient Se‐PIFs photocatalyst. The outcome is a benchmark instance for the use of selenium‐doped polyimide frameworks as a highly practical and efficient solar light active photocatalyst for carrying out the selective production of formic acid from environmental CO2. [ABSTRACT FROM AUTHOR]

To meet the energy demands artificial photosynthesis is playing the most promising role these days. Using sunlight directly in a manner that can provide useful chemicals is a sustainable means of generating energy. Studies are going on in this context to make better and effective photocatalyst. In this paper, we study the synthesis of flower‐like graphene quantum dots‐based fuschin (GQDF) photocatalyst from lemon, which is created by a green and sustainable process that is effective and environment friendly. The UV‐visible spectra of prepared GQDF showed a high molar extinction coefficient. A flower‐like GQDF photocatalyst has better catalytic efficiency for the selective creation and regeneration of the NAD(P)H cofactor. A newly designed flower‐like GQDF photocatalyst is used as one of its most effective photocatalysts as they have several additional applications in the removal of CO2 and aqueous contaminants like heavy metals. [ABSTRACT FROM AUTHOR]

Covalent triazine frameworks (CTFs), belonging to the super‐family of covalent organic frameworks, have attracted significant attention as a new type of photosensitizer due to the superb light‐harvesting ability and efficient charge transfer originating from the large surface area. However, the wide optical band gap in CTFs, which is larger than 3.0 eV, hinders the efficient light harvesting in the visible range. To overcome this limitation, we developed the new type CTFs photocatalyst based on the donor–acceptor conjugation scheme by using melamine (M) and 2,6‐diaminoanthraquinone (AQ) as monomeric units. The melamine‐2,6‐diaminoanthraquinone‐based covalent triazine frameworks (M‐AQ‐CTFs) photocatalyst shows the excellent light‐harvesting capacity with high molar extinction coefficient, and the suitable optical band gap involving the internal charge transfer character. Combination of M‐AQ‐CTFs and artificial photosynthetic system including the organometallic rhodium complex, acting as an electron mediator, exhibited the excellent photocatalytic efficiency for the regeneration of the nicotinamide cofactors such as NAD(P)H. In addition, this photocatalyst showed the high photocatalytic efficiency for the metal‐free aerobic oxidation of sulfide. This study demonstrates the high potential of CTFs photocatalyst with the donor–acceptor conjugated scheme can be actively used for artificial photosynthesis. [ABSTRACT FROM AUTHOR]

The dimethyl sulfite as an alkylating as well as alkoxylating reagent is well known in synthetic organic as well as organometallic chemistry for a long time. Herein, we have utilized dimethyl sulfite as an alkylating reagent and reacted with fluorescein derivative, N‐fluorescein‐lactam‐hydrazine (B). This reaction leads to the generation of tetramethylated fluorescein lactam hydrazine (A). The newly designed and synthesized molecule (A) has been characterized by 1H, 13C NMR and HRMS data. The antimicrobial activity of the synthesized alkylated fluorescein derivative has been tested against E. coli, P. aeruginosa, Salmonella typhimurium and S. aureus microbial agents. Time‐kill assay results also confirmed that fluorescein derivative is a potent antimicrobial agent and revealed that the time‐kill assay of fluorescein derivative is value‐added than the well‐known antibiotic. In addition, quantum chemical study was used to analyze its activity trend and correlated with the experimental data. The computed results of DFT revealed that the lipophilicity as well as the LUMO‐HOMO band gap (ΔELUMO‐HOMO = 4.75 eV) of compound A make it more suitable as an antimicrobial agent to match with in vitro antimicrobial experimental results. The MIC and MBC values of compound A were observed to be lower in contrast to fluorescein and ampicillin for all the tested bacterial strains, which were approximately 3‐ to 4‐fold lower than MIC and MBC values of the later. Results obtained from the study clearly indicate that compound A has better antimicrobial and bactericidal activity in comparison to ampicillin and fluorescein. Synthesized compound can be a better substitute of traditionally used antibiotics, Ampicillin. [ABSTRACT FROM AUTHOR]

An efficient photocatalytic regeneration of nicotinamide adenine dinucleotide (NADH) and nicotinamide adenine dinucleotide phosphate (NADPH) has been carried out by two‐electron reduction and protonation of NAD+/NADP+, induced by photons in the visible light region. This functional artificial photosynthetic counterpart of the complete energy‐trapping occurring in natural photosystem I (PS I) is achieved with nitrogen‐enrich graphene quantum dot (N‐EGQD) as the light‐harvesting photocatalyst. In buffer aqueous solution, this compound photo catalytically recycles a rhodium hydride complex of the type [Cp*Rh(bpy)H]+ (Cp* = pentamethylcyclopentadienyl, bpy = 2,2′‐bipyridine) which can mediate hydride transfer processes leading to nucleotide co‐factor reduction. Very promising yields of 73.31%/78.45% of NADH/NADPH with the excellent thermal stability of N‐EGQD photocatalyst is observed. Thus, in this work, an efficient light‐harvesting photocatalyst is synthesized for the regeneration of nicotinamide cofactor that has pharmaceuticals application. [ABSTRACT FROM AUTHOR]

A global challenge faced by light harvesting photocatalyst is how to promote the selective organic transformation, such as C‐S bond formation via radical–radical coupling under solar light. Here, we report a two‐dimensional covalent organic frameworks (2D‐COFs), poly (perylene‐imide‐benzoquinone) nanorod through in situ condensation on flexible activated carbon cloth (PPIBNR‐FACC) to function as a light harvester material for highly selective radical–radical coupling to vinyl sulfides (i.e. C‐S bond activation). Such a structure supports charge transfer from PPIBNR to FACC, which is essential for the selective radical–radical coupling. Hence, organic transformation is attaining high yields and selectivity (˜99%) under solar light using in situ prepared PPIBNR‐FACC photocatalyst. The structural virtues of PPIBNR‐FACC will trigger the utmost investigations into designable and versatile 2D‐COFs for fine chemical synthesis. [ABSTRACT FROM AUTHOR]

Selective radical‐radical coupling of terminal alkynes and thiol has been broadly used in chemical synthesis, providing plausible entries to the formation of anti‐Markovnikov products. Because of the selective control and Kharasch effect, the formation of Markovnikov products still remains an immense challenge. Herein, we designed a covalent organic polymer, poly(naphthalene 1,4,5,8‐tetracarboxylic dianhydrideimide‐benzoquinone) through in situ polymerization on activated flexible carbon cloth to function as a light harvester material for selective Markovnikov radical‐radical coupling of terminal alkynes and thiol. Mechanistic explorations verified that cross‐coupling between radical of terminal alkynes and thiol might be the key route in this organic transformation, such as C—S bond formation. This selective radical‐radical Markovnikov of cross‐coupling protocol provide an opportunity to assist the synthesis of valuable vinyl sulfide. Additionally, the synthesized material has been explored as liquefied petroleum gas (LPG) sensor for 0.5, 1.0, 1.5, and 2.0 vol% LPG, respectively. At 2.0 vol% LPG, it shows maximum sensor response as 635.29. Least response and recovery times are 2.44 and 1.0 s, respectively. [ABSTRACT FROM AUTHOR]

Main observation and conclusion: Photoredox C—H bond formation can proceed in aerobic environment under solar light and has therefore become attractive. Nowadays, different types of expensive novel metal complexes and nanomaterials have been urbanized as photocatalysts for direct C—H bond formation in between derivatives of heteroarenes (HAs) and aryl diazonium salts. These photocatalysts, however, still suffer from poor stability, high cost, and decay. Herein, a graphitic carbon nitride‐based fluorescein isothiocyanate (g‐C3N4–FITC) film photocatalyst has been reported, which shows excellent light harvesting ability, and band gap suitability to catalyze the metal free direct C—H arylation of HAs under solar light at ambient temperature. Moreover, the g‐C3N4–FITC film photocatalyst can be reused four times without significant loss of activity, confirming the excellent photocatalytic stability. The current strategy to construct a g‐C3N4–FITC film photocatalyst for direct C—H arylation opens a new path towards replacing metal‐based catalysts in fine chemical synthesis. [ABSTRACT FROM AUTHOR]

Reactive Oxygen species (ROS) are well known for their oxidizing behaviour but it differs in fluorescein derivatives chemistry. With t‐BuOOH, the probe F shows its unique turn‐off sensing (A), while with NaOCl probe shows turn‐on sensing property (B). In this study, it was observed that in situ generated species formed by the reaction of probe (F) with t‐BuOOH is a unique molecule, having high turn‐on behaviour in presence of sodium hypochlorite (≈500 times). Further, fluorescence microscopy imaging using adenocarcinoma cells, A549 cells revealed that in‐situ generated molecule, could be used as an efficient fluorescent probe for detecting NaOCl in living cells. [ABSTRACT FROM AUTHOR]

Abstract: The conversion of CO2 to valuable solar fuels by means of solar energy using metal‐free flexible film photocatalysts is an appealing strategy. Here we demonstrate a three dimensional aromatic polymer (3DAP) derived from triptycene (TC) as a metal free, stable and highly efficient visible light responsive flexible film photocatalyst for selective solar fuel production from CO2. For this research work, the polymerization of TC by the Diels–Alder reaction is exploited for the first time as a new synthetic approach for the construction of three dimensional aromatic polymer photocatalyst. The visible‐light harvesting ability, band gap suitability, high Brunauer–Emmett–Teller (BET) surface area and electron transfer capability via interconnecting 3D chain of 3DAP contribute to the excellent performance of the film photocatalyst as evident from 91.09 % NADH regeneration and 225.12 μmol of formic acid production. This work provides important insights into the design of flexible polymer film photocatalyst for selective solar fuel formation from CO2 and is expected to trigger further interest in sustainable solar energy conversion applications such as tailorable and wearable devices. [ABSTRACT FROM AUTHOR]

Abstract: The conversion of CO2 to valuable solar fuels by means of solar energy using metal‐free flexible film photocatalysts is an appealing strategy. Here we demonstrate a three dimensional aromatic polymer (3DAP) derived from triptycene (TC) as a metal free, stable and highly efficient visible light responsive flexible film photocatalyst for selective solar fuel production from CO2. For this research work, the polymerization of TC by the Diels–Alder reaction is exploited for the first time as a new synthetic approach for the construction of three dimensional aromatic polymer photocatalyst. The visible‐light harvesting ability, band gap suitability, high Brunauer–Emmett–Teller (BET) surface area and electron transfer capability via interconnecting 3D chain of 3DAP contribute to the excellent performance of the film photocatalyst as evident from 91.09 % NADH regeneration and 225.12 μmol of formic acid production. This work provides important insights into the design of flexible polymer film photocatalyst for selective solar fuel formation from CO2 and is expected to trigger further interest in sustainable solar energy conversion applications such as tailorable and wearable devices. [ABSTRACT FROM AUTHOR]

Photocatalytic CO2 reduction for solar fuel production has attracted considerable attention as it can simultaneously reduce the effects of worldwide fossil-fuel shortage and global warming. As a means to achieve this we herein report the facile and eco-friendly synthesis of highly active carbon nanodots-silica hybrid photocatalyst (CNDSH) by a reverse microemulsion method with a nonionic surfactant. The photocatalyst-biocatalyst coupled system developed using CNDSH as photocatalyst functions efficiently to carry out high NADH regeneration (74.10±0.17 %) followed by its consumption in exclusive formic acid production (203.33±1.9 μmol) from CO2. This research work is a benchmark example of carbon nanodots-silica hybrid photocatalyst system for solar fuel production and expected to trigger further interest in the development of efficient and eco-friendly CO2 reduction systems. [ABSTRACT FROM AUTHOR]

Photocatalytic CO2 reduction for solar fuel production has attracted considerable attention as it can simultaneously reduce the effects of worldwide fossil-fuel shortage and global warming. As a means to achieve this we herein report the facile and eco-friendly synthesis of highly active carbon nanodots-silica hybrid photocatalyst (CNDSH) by a reverse microemulsion method with a nonionic surfactant. The photocatalyst-biocatalyst coupled system developed using CNDSH as photocatalyst functions efficiently to carry out high NADH regeneration (74.10±0.17 %) followed by its consumption in exclusive formic acid production (203.33±1.9 μmol) from CO2. This research work is a benchmark example of carbon nanodots-silica hybrid photocatalyst system for solar fuel production and expected to trigger further interest in the development of efficient and eco-friendly CO2 reduction systems. [ABSTRACT FROM AUTHOR]

Functionalized graphene quantum dots (fGQDs) as visible-light-harvesting photocatalysts for solar fuel production from CO2 is explored for the first time. The highly efficient light-harvesting fGQDs photocatalyst upon integration with the biocatalyst performs highly selective CO2 reduction to formic acid. The results are a benchmark example of GQD based materials as photocatalysts for selective production of solar fuels from CO2 and opens up possibilities for greener synthesis of other value added chemicals. [ABSTRACT FROM AUTHOR]

Functionalized graphene quantum dots (fGQDs) as visible-light-harvesting photocatalysts for solar fuel production from CO2 is explored for the first time. The highly efficient light-harvesting fGQDs photocatalyst upon integration with the biocatalyst performs highly selective CO2 reduction to formic acid. The results are a benchmark example of GQD based materials as photocatalysts for selective production of solar fuels from CO2 and opens up possibilities for greener synthesis of other value added chemicals. [ABSTRACT FROM AUTHOR]

Heterochromatin assembly in fission yeast depends on the Clr4 histone methyltransferase, which targets H3K9. We show that the histone deacetylase Sir2 is required for Clr4 activity at telomeres, but acts redundantly with Clr3 histone deacetylase to maintain centromeric heterochromatin. However, Sir2 is critical for Clr4 function during de novo centromeric heterochromatin assembly. We identified new targets of Sir2 and tested if their deacetylation is necessary for Clr4-mediated heterochromatin establishment. Sir2 preferentially deacetylates H4K16Ac and H3K4Ac, but mutation of these residues to mimic acetylation did not prevent Clr4-mediated heterochromatin establishment. Sir2 also deacetylates H3K9Ac and H3K14Ac. Strains bearing H3K9 or H3K14 mutations exhibit heterochromatin defects. H3K9 mutation blocks Clr4 function, but why H3K14 mutation impacts heterochromatin was not known. Here, we demonstrate that recruitment of Clr4 to centromeres is blocked by mutation of H3K14. We suggest that Sir2 deacetylates H3K14 to target Clr4 to centromeres. Further, we demonstrate that Sir2 is critical for de novo accumulation of H3K9me2 in RNAi-deficient cells. These analyses place Sir2 and H3K14 deacetylation upstream of Clr4 recruitment during heterochromatin assembly. [ABSTRACT FROM AUTHOR]

The article presents research on first- and second-tier dendrimer molecules and assessment of their preparation, structural elucidation, molecular weight determination, and molecular recognitionf. In this study, the structures of the molecules were examined by proton nuclear magnetic resonance (H-NMR) among others, with the activation energy calculated using the Freeman-Carroll model. The characteristics of the studied molecules such as molal volume, intrinsic viscosities and surface tensions are described.

C60‐based polymeric systems have been constantly anticipated for sustainable solar energy conversion. Reported, herein is a C60 polymer film as visible light active photocatalyst for efficient and selective reduction of CO2 for the first time. The C60 polymer photocatalyst is synthesized via covalent coupling of C60 monomer units consisting of tetra substituted C60‐pyrene conjugates through spacer groups. The synthesized C60 polymer photocatalyst possesses an extended network of well‐defined repeating monomer units with good stability and visible light‐induced photocatalytic activity. The enhanced visible light harvesting ability of C60 polymer photocatalyst reasonably yields it with higher catalytic ability than its monomer unit. The C60 polymer film photocatalyst upon coupling with the biocatalyst carries out highly selective visible light driven reduction of CO2 to HCOOH (239.46 μmol). The tandem way of incorporating C60 into visible light active polymeric films for continuous use may be highly rewarding for their extended photocatalytic activity for solar fuel production from CO2. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48536. [ABSTRACT FROM AUTHOR]

Abstract: The front cover artwork for issue 9/2018 is provided by Prof. Jin‐Ook Baeg's artificial photosynthesis research group from Korea Research Institute of Chemical Technology (KRICT), Republic of Korea. The image shows a light harvesting 3D aromatic polymer (3DAP) derived from triptycene that can efficiently and selectively convert CO2 to formic acid. See the Full Paper itself at https://doi.org/10.1002/cctc.201701730. [ABSTRACT FROM AUTHOR]

Abstract: The front cover artwork for issue 9/2018 is provided by Prof. Jin‐Ook Baeg's artificial photosynthesis research group from Korea Research Institute of Chemical Technology (KRICT), Republic of Korea. The image shows a light harvesting 3D aromatic polymer (3DAP) derived from triptycene that can efficiently and selectively convert CO2 to formic acid. See the Full Paper itself at https://doi.org/10.1002/cctc.201701730. [ABSTRACT FROM AUTHOR]

The Cover shows the exclusive production of formic acid from CO2 using a carbon nanodots‐silica hybrid photocatalyst system.In their Full Paper, R. K. Yadav et al. report a new carbon nanodots‐silica hybrid material (CNDSH) as a highly active photocatalyst for the photocatalytic‐biocatalytic coupled selective solar fuel production system from CO2. The CNDSH photocatalyst was obtained by a facile and ecofriendly reverse microemulsion method with a nonionic surfactant. This work would serve as a benchmark example of a carbon nanodots‐silica hybrid photocatalyst system for solar fuel production and is expected to trigger further interest in the development of efficient and ecofriendly solar CO2 reduction systems. [ABSTRACT FROM AUTHOR]