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Photocatalysis has emerged as a promising approach for generating solar chemical and organic transformations under the solar light spectrum, employing polymer photocatalysts. In this study, our aim is to achieve the regeneration of NADH and fixation of nitroarene compounds, which hold significant importance in various fields such as pharmaceuticals, biology, and chemistry. The development of an in-situ nature-inspired artificial photosynthetic pathway represents a challenging task, as it involves harnessing solar energy for efficient solar chemical production and organic transformation. In this work, we have successfully synthesized a novel artificial photosynthetic polymer, named TFc photocatalyst, through the Friedel-Crafts alkylation reaction between triptycene (T) and a ferrocene motif (Fc). The TF C photocatalyst is a promising material with excellent optical properties, an appropriate band gap, and the ability to facilitate the regeneration of NADH and the fixation of nitroarene compounds through photocatalysis. These characteristics are necessary for several applications, including organic synthesis and environmental remediation. Our research provides a significant step forward in establishing a reliable pathway for the regeneration and fixation of solar chemicals and organic compounds under the solar light spectrum., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Ltd. All rights reserved.)

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 CO 2 and aqueous contaminants like heavy metals., (© 2021 American Society for Photobiology.)

The photocatalyst-enzyme coupled system for artificial photosynthesis process is one of the most promising methods of solar energy conversion for the synthesis of organic chemicals or fuel. Here we report the synthesis of a novel graphene-based visible light active photocatalyst which covalently bonded the chromophore, such as multianthraquinone substituted porphyrin with the chemically converted graphene as a photocatalyst of the artificial photosynthesis system for an efficient photosynthetic production of formic acid from CO(2). The results not only show a benchmark example of the graphene-based material used as a photocatalyst in general artificial photosynthesis but also the benchmark example of the selective production system of solar chemicals/solar fuel directly from CO(2).

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]

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]

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]

Metal-free photocatalysis is a sustainable and environmentally friendly method of transforming solar energy into molecules with added value. A light-harvesting photocatalyst without metal Phloxin-B (P-B) in-situ edge functionalized graphitic carbon nitride (g-C3N4) was assembled to enable the solar-light responsive photocatalytic C-H bond arylation and NADH regeneration cofactor. The photocatalytic performance was examined to estimate the C-H bond arylation and NADH regeneration efficiency by g-C3N4/P-B composite photocatalyst. The charge carrier transfer of g-C3N4 was found to be stimulated by the light harvester P-B layer, increasing the efficiency of chemical synthesis under solar light irradiation. In light of this, the g-C3N4/P-B composite photocatalyst exhibits high photocatalytic activity for the successful C-H bond arylation (98.6%) and regeneration of NADH (70.7%). This composite photocatalyst was characterized by FTIR and UV-visible spectrum along with particle size analysis, and cyclic voltammetry (CV). This effort offers a new and superficial technique to synthesize a highly efficient g-C3N4/P-B composite photocatalyst and afford a greener path for renewable energy and photocatalytic reactions. The graphical abstract represents the highly selective g-C3N4/P-B photocatalyst for the C-H bond activation of 4-bromoaryldiazonium salts with furan and regeneration of NADH under solar light irradiation. The g-C3N4/P-B photocatalyst has been effective photocatalytic property due stacking of Phloxin-B dye (P-B) on the g-C3N4 sheet. NADH regenerated and C-H bond arylated products are used as substrates in the pharma industries. [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]

The photocatalyst-enzyme coupled system for artificial photosynthesis process is one of the most promising methods of solar energy conversion for the synthesis of organic chemicals or fuel. Here we report the synthesis of a novel graphene-based visible light active photocatalyst which covalently bonded the chromophore, such as multianthraquinone substituted porphyrin with the chemically converted graphene as a photocatalyst of the artificial photosynthesis system for an efficient photosynthetic production of formic acid from CO2. The results not only show a benchmark example of the graphene-based material used as a photocatalyst in general artificial photosynthesis but also the benchmark example of the selective production system of solar chemicals/solar fuel directly from CO2. [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]

• Highly efficient protein/graphitic carbon nitride/sulfur hydrogel photocatalyst. • Artificial photosynthetic system for mimicking natural photosynthesis. • 86.78% Nicotinamide adenine dinucleotide regeneration in 2 h. • 90.0% l -Glutamate production from α-ketoglutarate under visible light irradiation. Artificial photosynthesis process is a nature inspired process that can convert solar energy to important value added chemicals. Here, we report the synthesis of a self-assembled protein and carbon nitride/sulfur hydrogel (Fmoc- d -PheA/g-C 3 N 4 /S) as a visible light active hydrogel photocatalyst for 86.78% reduced nicotinamide adenine dinucleotide (NADH) regeneration and 90.0% l -Glutamate production under solar light irradiation. The present work represents a new benchmark example for NADH regeneration and solar chemical production. [ABSTRACT FROM AUTHOR]