Presented in this paper is photoinduced hydroxylation of organic halides, providing a mild access to a range of functionalized phenols and aliphatic alcohols. These reactions generally proceed under mild reaction conditions with no need for a photocatalyst or a strong base and show a wide substrate scope as well as excellent functional group tolerance. This work highlights the unique role of NaI that allows a challenging transformation to proceed under mild reaction conditions.
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http://dx.doi.org/10.1021/acs.orglett.9b03317 | DOI Listing |
Plant Physiol Biochem
December 2024
Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610213, China. Electronic address:
Cytochrome P450 enzymes (CYPs), the members of the largest superfamily of enzymes in plant kingdom, catalyze a variety of functional group transformations involved in metabolite biosynthesis, end-product derivatization, and exogeneous molecule detoxification. Nevertheless, CYPs' functional characterization and practically industrial application have been largely encumbered by their critical dependency on the reducing equivalent for the catalytic cycling, driven by the tedious electron relay mediated by CYP reductase (CPR). Here, we report a photoinduced electron transfer system that initiates and sustains the CYP-catalyzed reaction cycling.
View Article and Find Full Text PDFOrg Biomol Chem
December 2024
National and Local Joint Engineering Research Center of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China.
Deoxyfluorination is one of the most practical methods for introducing fluorine atoms, since hydroxyl groups are commonly found in organic small molecules. Traditional fluorination methods often rely on hazardous fluorinating reagents. Herein, we report the deoxyfluorination of propargyl alcohols using sulfur hexafluoride (SF) as a safe fluorinating agent under photocatalytic conditions.
View Article and Find Full Text PDFNanomaterials (Basel)
November 2024
School of Chemistry and Chemical Engineering, North University of China, Taiyuan 030051, China.
The swift recombination of photo-induced electrons and holes is a major obstacle to the catalytic efficiency of TiO nanomaterials, but the incorporation of graphene oxide and out-field modification is considered a potent method to augment photocatalytic properties. In this work, a series of GO/TiO photocatalysts were successfully optimized by a microwave field. As determined by transient photocurrent response and electrochemical impedance spectroscopy (EIS) tests, microwave irradiation at 600 W for 5 min on the GO/TiO photocatalyst promoted interfacial charge transfer and suppressed charge recombination.
View Article and Find Full Text PDFBioorg Chem
December 2024
G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Akademicheskaya Str. 1, 153045 Ivanovo, Russian Federation. Electronic address:
The axial complex of Sn(IV)-tetra(4-sulfophenyl)porphyrin (SnP) with Rose Bengal (RB) was obtained where RB axial binding is realized through the hydroxyl groups of the xanthene dye [SnP(RB)]. The luminescent properties of the SnP(RB) (fluorescence and ability to generate singlet oxygen at room temperature) in aqueous media with additives of surfactant cetylpyridinium chloride (CPC) and ε-poly-l-lysine (EPL) were studied. It was found that nature of the medium (surfactant additives of different concentrations) determines the effectiveness of the photoinduced energy transfer from the RB fragment to the SnP fragment of the hybrid fluorophore (HF).
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China. Electronic address:
Developing candidate adsorbents with high capacity and selectivity for adsorption is a critical approach to recover gold from secondary sources such as electronic waste (e-waste). This measure not only contributes to the recycling of valuable resources but also benefits environment protection and mitigates the detriment to the ecosystem. Traditional covalent organic frameworks (COFs) have garnered great potential in various fields owing to their unique structures and innate functional sites.
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