Of noble descent: A fully noble‐metal‐free system for the photocatalyticreduction of water at room temperature has been developed. This system consists of CuI complexes as photosensitizers and [Fe3(CO)12] as the water‐reduction catalyst. The novel Cu‐based photosensitizers are relatively inexpensive, readily available from commercial sources, and stable to ambient conditions, thus making them an attractive
Heteroleptic copper(I) complexes as energy transfer photocatalysts for the intermolecular [2 + 2] photodimerization of chalcones, cinnamates and cinnamamides
作者:Qing-An Wu、Chen-Chao Ren、Feng Chen、Tian-Qi Wang、Yu Zhang、Xue-Fen Liu、Jian-Bin Chen、Shu-Ping Luo
DOI:10.1016/j.tetlet.2021.153091
日期:2021.5
The [2 + 2] photodimerization of chalcones, cinnamates and cinnamamides can be effectively catalyzed by heteroleptic copper(I) complexes. The reactions were carried out under mild reaction conditions and the products were obtained in 20–72% yield under visible light irradiation. The copper-based photocatalyst comprised of the rigid phenanthroline ligand with substituents at the 2,9-positions and the
abundant metals, i.e., Cu(I)(dmp)(P)2(+) (dmp =2,9-dimethyl-1,10-phenanthroline; P = phosphine ligand) as a redox photosensitizer and Fe(II)(dmp)2(NCS)2 as a catalyst, produced CO as the main product by visible light irradiation. The best photocatalysis was obtained using a Cu(I) complex with a tetradentate dmp ligand tethering two phosphine groups, where the turnover number and quantum yield of CO formation
An efficient and general process is reported for the photoinduced, copper-catalysed direct perfluoroalkylation of C–H bonds in a broad range of heteroarenes with commercially available perfluoroalkyl iodides. This redox neutral process is simply based on the use of [Cu(bcp)DPEPhos]PF6 as the photoredox catalyst in the presence of potassium acetate and smoothly operates at room temperature.