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Polymer–protein bioconjugation offers a powerful strategy to alter the physical properties of proteins, and various synthetic polymer compositions and architectures have been investigated for this purpose. Nevertheless, conjugation of molecular bottlebrush polymers (BPs) to proteins remains an unsolved challenge due to the large size of BPs and a general lack of methods to transform the chain ends of BPs into functional groups suitable for bioconjugation. Here, we present a strategy to address this challenge in the context of BPs prepared by "graft-through" ring-opening metathesis polymerization (ROMP), one of the most powerful methods for BP synthesis. Quenching ROMP of PEGylated norbornene macromonomers with an activated enyne terminator facilitates the transformation of the BP Ru alkylidene chain ends into Pd oxidative addition complexes (OACs) for facile bioconjugation. This strategy is shown to be effective for the synthesis of two BP–protein conjugates (albumin and ERG), setting the stage for a new class of BP–protein conjugates for future therapeutic and imaging applications. [ABSTRACT FROM AUTHOR]

The homogeneous/heterogeneous catalyst combination of VO2+ in anolyte with Pd/C at the anode is first introduced in a formic acid fuel cell to enhance HCOOH electrooxidation. The VO2+/Pd catalyst combination establishes a stepwise reaction pathway involving HCOOH dehydrogenation to form V3+ from VO2+ reduction and subsequent V3+ electrooxidation to regain VO2+. The fuel cell with the VO2+/Pd combination presents a peak power density of 341.3 mW cm−2 and stable power density higher than 30 mW cm−2. [ABSTRACT FROM AUTHOR]

In this study, we report a series of novel flavone-based sensors that exhibit a superior fluorescence response when interacting with serum albumin in real serum samples and in acrylamide gels. The detection limit of probe 4 for serum albumin solution is 0.09 μg mL−1, and the detectable volume for monkey serum reaches as low as 0.03 μL. [ABSTRACT FROM AUTHOR]

Copper-catalyzed ortho-halogenation of C(sp2)–H bonds directed by a PIP directing group with NXS (X = Cl, Br, I) has been developed. The reaction is scalable and tolerates a broad range of functional groups and heteroarenes, providing an efficient access to halogenated arenes and heteroarenes. [ABSTRACT FROM AUTHOR]

A commercially available naphthalene fluorophore serves as a ratiometric indicator for albumin, showcasing its applications in albumin-based supramolecular recognition. [ABSTRACT FROM AUTHOR]

A commercial anti-cancer drug, axitinib, exhibits very stable dual emissions for discrimination of human serum albumin. [ABSTRACT FROM AUTHOR]

The design of stable and variable aryl linkers for conjugating drug moieties to the metabolism-related thiols is of importance in drug discovery. We disclosed that thioimidazolium groups are unique scaffolds for the thiol–(hetero)arene conjugation under mild conditions. The drug bound thioimidazolium salts, which are easily accessible via a copper-mediated Chan–Lam process in gram-scale, could be successfully applied to the late-stage coupling of bioactive thiols to construct a broad array of drug-like molecules. [ABSTRACT FROM AUTHOR]

The first fluorescent sensor based on the indicator displacement assay (IDA) for on-site determination of etomidate. [ABSTRACT FROM AUTHOR]

Ultrafine ternary carbide Co6W6C@C nanoparticles (NPs) were successfully synthesized and these NPs exhibited high catalytic activities for the hydrazine oxidation reaction (HzOR) under alkaline conditions. In a practical O2–hydrazine fuel cell test, its peak power density reached 203 mW cm−2, a value superior to that of the state-of-the-art commercial Pt/C catalyst. [ABSTRACT FROM AUTHOR]

As a prospective alternative liquid propellant, 1,4,4-tetramethyl-2-tetrazene (TMTZ) possesses high enthalpy of formation and environment friendly decomposition products, and shows a promising application prospect in aerospace, munitions manufacturing, etc. An environment friendly and convenient synthesis of TMTZ through electrochemical oxidative coupling of undimethylhydrazine (UDMH) on commercially procured electrodes was carried out under mild conditions, in which the purity is up to 98.5% with a yield of over 45%. It is a simple, clean and suitable method for industrial production in contrast with the previously reported conventional chemical oxidation syntheses. [ABSTRACT FROM AUTHOR]

Intermolecular proton transfer from a flavonol-based probe to the arginine (Arg222) in drug site 1 of human serum albumin triggers an unusual red-shifted ratiometric fluorescence response, which can be applied in the point-to-care diagnosis of hypoalbuminemia. [ABSTRACT FROM AUTHOR]

A targeted and image-guided platinum prodrug conjugated with a photosensitizer with aggregation-induced emission (AIE) characteristics was designed for real-time and in situ drug activation monitoring in cancer cells as well as combinational photodynamic–chemotherapy against cisplatin resistant cancer cells. [ABSTRACT FROM AUTHOR]

The first nickel-catalyzed thiolation of unactivated C(sp3)–H bonds with disulfides was described. This transformation uses (dppp)NiCl2 as a catalyst and BINOL as a ligand, which are efficient for the thiolation of β-methyl C(sp3)–H bonds of a broad range of aliphatic carboxamides. The reaction provides an efficient synthetic pathway to access diverse thioethers. [ABSTRACT FROM AUTHOR]

A nickel-catalyzed thiolation of unactivated C(sp2)–H bonds with disulfides employing the PIP directing group was described. This process uses a catalytic nickel catalyst and no metallic oxidants or cocatalysts are required. The reaction tolerates various important functional groups and heteroarenes, providing an efficient synthetic pathway to access diverse diaryl sulfides. [ABSTRACT FROM AUTHOR]

A series of heterogeneous molecular catalysts by immobilizing nickel(II) phthalocyanine (NiPc) onto different carbon supports were constructed to study the influence of the catalyst's microstructure on the performance of electrochemical carbon dioxide reduction reaction (CO2RR). The microporous structure of the electrocatalysts could influence CO2 transfer and therefore change the CO2 concentration at the surface of the catalyst, which singnificantly impacted the CO2RR performance. [ABSTRACT FROM AUTHOR]

The hydroxyl substituent in flavonoids can cause the binding site to change from DS1 to DS2 and restore the ESIPT process of flavonoids, thereby leading to a unique dual-emissive response towards human serum albumin. [ABSTRACT FROM AUTHOR]

We report an intracellular imaging and assay nanoplatform for RNase A using a DNA tetrahedron-based fluorescent probe as a substrate. Importantly, a natural compound was used as an RNase A activity stimulator to improve the sensitivity. This platform provides an alternative for the diagnosis and prognosis of RNase A-related diseases and drug screening. [ABSTRACT FROM AUTHOR]

Control of magnetic performances of molecular magnets is essential but few efforts have been documented. A green and efficient sonication assisted synthesis of a new heterometallic diruthenium(II , III) carbonate, Na[Ni(H2O)4Ru2(CO3)4]·3H2O (1), was carried out by self-assembling in aqueous solution. Compound 1 exhibits spin-glass behavior below ∼5.0 K, and a systematic investigation of the ultrasonic irradiation influence on the powder samples reveals that their coercivity increases from 50 Oe to 743 Oe with the control of ultrasonic power under appropriate conditions. [ABSTRACT FROM AUTHOR]

We herein provide a simple design strategy to improve the sensing specificity towards human serum albumin by incorporating a nitrobenzene quencher into a traditional polarity-sensitive probe in responding to the interference from blood lipids. [ABSTRACT FROM AUTHOR]

A conjugated polymer of poly(fluorene-co-benzothiadiazole) (PFBT) was modified by a soft segment of poly(dimethylsiloxane) (PDMS) to yield a copolymer via dynamic imine bonds. The copolymer was casted as a free-standing film, which was intrinsically flexible, stretchable, and showed tunable shape memory, healable and degradable effects. [ABSTRACT FROM AUTHOR]

Herein we report the preparation of conjugated polymer nanoparticles via in situ Sonogashira polymerization to serve as a H2O2-degradable fluorescence/photoacoustic dual-modality contrast agent for cellular imaging. [ABSTRACT FROM AUTHOR]

Fine-tuning electron acceptors through changing one cyano group to an amide generates a more stable and emissive fluorophore with the character of aggregation-induced emission. Conjugation between the new fluorophore and CFFKDEL generated an excellent ER targeting light-up probe with high specificity and good photostability. [ABSTRACT FROM AUTHOR]

We herein report a new strategy to obtain highly efficient photosensitizers (PSs) by reducing the singlet–triplet energy gap (ΔEST) and blocking the non-radiative decay pathways. Through precise molecular design, TP1–8 were synthesized to exhibit predictable properties including moderate to high photosensitizing efficacy, tunable absorption and emission wavelengths and aggregation-induced emission characteristics. [ABSTRACT FROM AUTHOR]

A signal amplified fluorogenic ELISA based on self-clickable fluorogens with aggregation-induced emission characteristics (AIEgen) as a substrate was developed for ultrasensitive immunoassay. [ABSTRACT FROM AUTHOR]

A two-channel responsive and AIE-active fluorescent probe was developed to selectively detect superoxide anions in living cells, which can be used to track the endogenous superoxide anion level when cells undergo apoptosis and inflammation. [ABSTRACT FROM AUTHOR]

An AIE-active “turn-on” bioprobe is designed for hydrogen peroxide detection based on an imine-functionalized tetraphenylethene derivative. The linear fluorescence response enables quantification of hydrogen peroxide with superior sensitivity and selectivity. Meanwhile, glucose assay is also realized by taking advantage of GOx/glucose enzymatic reaction. [ABSTRACT FROM AUTHOR]

A novel α1–2-fucosyltransferase from Thermosynechococcus elongatus BP-1 (Te2FT) with high fucosyltransferase activity and low donor hydrolysis activity was discovered and characterized. It was used in an efficient one-pot multienzyme (OPME) fucosylation system for the high-yield synthesis of human blood group H antigens containing β1–3-linked galactosides and an important human milk oligosaccharide (HMOS) lacto-N-fucopentaose I (LNFP I) on preparative and gram scales. LNFP I was shown to be selectively consumed by Bifidobacterium longum subsp. infantis but not Bifidobacterium animalis subsp. lactis and is a potential prebiotic. [ABSTRACT FROM AUTHOR]

We report the design of AIE fluorogen (AIEgen)-based multifunctional organic nanoparticles with surface siRNA decoration for targeted photodynamic therapy and RNA interference therapy. [ABSTRACT FROM AUTHOR]

A polymer and silica co-protection strategy has been developed to encapsulate organic fluorogens with aggregation-induced emission and charge transfer characteristics into small nanoparticles (NPs). The co-pretected NPs show bright red fluorescence (50% quantum yield) with a large two-photon action cross-section (450 GM at 840 nm), which have been sucessfully used for two-photon fluorescence imaging of vasculature of the mouse tibial muscle. [ABSTRACT FROM AUTHOR]

We report the design and synthesis of a red fluorescent AIE light-up probe for selective recognition, naked-eye detection, and image-guided photodynamic killing of Gram-positive bacteria, including vancomycin-resistant Enterococcus strains. [ABSTRACT FROM AUTHOR]

By introducing different surfactants into a reaction system, two previous mixed-phase Ni(ii)–MOFs constructed from an undeveloped pyridyl-tetracarboxylate and Ni(ii) salts were successfully isolated to obtain two pure products. Compound 1 exhibits a 3D H-bonded network with (3,8)-connected {4.52}2{42.56.614.72.84} topology, while 2 features a 3D 2-fold interpenetrating framework with a self-penetrating (3,4,4)-connected {62.103.12}{63}2{64.8.10}2 topological net. [ABSTRACT FROM AUTHOR]

Reaction of α-diimine-stabilized “digallane” [Ga2L2] with phenazine (Phz) leads to gallium complexes in which Phz and α-diimine show different reduced forms, demonstrating their noninnocence and diverse coordination modes. [ABSTRACT FROM AUTHOR]