Cage Encapsulated Gold Nanoparticles as Heterogeneous Photocatalyst for Facile and Selective Reduction of Nitroarenes to Azo Compounds
作者:Bijnaneswar Mondal、Partha Sarathi Mukherjee
DOI:10.1021/jacs.8b07767
日期:2018.10.3
fine-dispersed cage anchored AuNPs (Au@OC1R) have been finally used as potential heterogeneous photocatalyst for very facile and selective conversion of nitroarenes to respective azo compounds at ambient temperature in just 2 h reaction time. Exceptional chemical stability and reusability without any agglomeration of AuNPs even after several cycles of use are the potential features of this material. The composite
The synthesis of robust, polymeric hole-transport materials from oligoarylamine substituted styrenes
作者:Neil B. McKeown、Samer Badriya、Madeleine Helliwell、Maxim Shkunov
DOI:10.1039/b614235d
日期:——
Novel styrene-based oligoarylamine monomers are described which are suitable for the preparation of polymeric hole-transport materials, with very high glass transition temperatures. The monomers are prepared using the Wittig reaction from the appropriate aldehyde precursor, which was assembled using the classical Ullmann reaction. A number of the monomers yielded high-quality crystals which facilitated X-ray characterisation. Polymerisation was achieved either by solution free-radical initiation or by condensed phase thermal autopolymerisation. The latter suggests a method of initiator-free polymerisation which may have potential for multilayer device fabrication.
redox and singletexcitedstate energies, in both polar and non-polar solvents, suggested the possibility of electron transfer from the ground state of PTZ to the singletexcited BODIPY moiety (PTZ → 1BODIPY*) to produce PTZ+–BODIPY−. Accordingly, steady state emission studies revealed the efficient fluorescence quenching of the singletexcited BODIPY in the dyads and the efficiency of quenching for all
Phenothiazine-BODIPY-Fullerene Triads as Photosynthetic Reaction Center Models: Substitution and Solvent Polarity Effects on Photoinduced Charge Separation and Recombination
作者:Chandra B. KC、Gary N. Lim、Vladimir N. Nesterov、Paul A. Karr、Francis D'Souza
DOI:10.1002/chem.201404863
日期:2014.12.15
emission, computational, and differential pulse voltammetry studies were systematically performed to establish the molecular integrity of the triads. The N‐substituted phenothiazine was found to be easier to oxidize by 60 mV compared to the C‐substituted analogue. The geometry and electronic structures were obtained by B3LYP/6‐31G(dp) calculations (for H, B, N, and O) and B3LYP/6‐31G(df) calculations (for
Hypochlorite-promoted inhibition of photo-induced electron transfer in phenothiazine–borondipyrromethene donor–acceptor dyad: a cost-effective and metal-free “turn-on” fluorescent chemosensor for hypochlorite