Home  |  Contact  |  Sitemap  |  Chinese  |  CAS
Search: 
Research
Location: Home > 旧网站归档- > Research > Research Progress
Long‐Lived Excited States of Zwitterionic Copper (I) Complexes for Photoinduced Cross‐Dehydrogenative Coupling Reactions
Author:
ArticleSource:
Update time: 2014-11-27
Close
Text Size: A A A
Print
Four heteroleptic copper(I) complexes containing phenanthroline and monoanionic nido-carborane-diphosphine ligands have been prepared and structurally characterized by various spectroscopic techniques and X-ray diffraction. These complexes exhibit intense absorptions in the visible range and excited-state lifetimes on the microsecond scale. Their application in visible-light-induced cross-dehydrogenative coupling reactions was investigated. Preliminary studies showed that one of the four copper(I) complexes is an efficient catalyst for photoinduced oxidative C[BOND]H functionalization using oxygen as oxidant. Furthermore, α-functionalized tertiary amines were obtained in good-to-excellent yields by light irradiation (λ>420 nm) of a mixture of our CuI complex, tertiary amines, and a variety of nucleophiles (nitroalkane, acetone, or indoles) under aerobic conditions. Electron paramagnetic resonance measurements provided evidence for the formation of superoxide radical anions (O2−⋅) rather than singlet oxygen (1O2) during these photocatalytic reactions.
Chemistry - A European Journal, 2014
Synthesis and chemical structures of Cu1Cu4.

X-ray crystal structure of Cu2
Perspective view with thermal ellipsoids drawn at the 30 % probability level. Hydrogen atoms and solvent molecules have been omitted for clarity.
 
Copyright 2007-2015 All rights reserved. 29 Zhongguancun East Road, Haidian District, Beijing, 100190, PR China
Please send any comments or problems with this site to: lzhang@mail.ipc.ac.cn.