Platinum(II) Schiff Base Complexes as Photocatalysts for Visible-Light-Induced Cross-Dehydrogenative Coupling Reactions
作者:Deepak Prakash Shelar、Ting-Ting Li、Yong Chen、Wen-Fu Fu
DOI:10.1002/cplu.201500157
日期:2015.10
Four phosphorescent platinum(II) Schiff base complexes are screened for application in visible-light-induced cross-dehydrogenative coupling (CDC) reactions. Preliminary studies show that, among the four platinum(II) complexes, Pt3 is an efficient catalyst for CDC reactions with oxygen as an oxidant. Light irradiation (λ>420 nm) on a mixture of the PtII complex, tertiary amine, and a variety of nucleophiles
筛选了四种磷光铂(II)席夫碱配合物,用于可见光诱导的交叉脱氢偶联(CDC)反应。初步研究表明,在四种铂(II)配合物中,Pt3是一种以氧气为氧化剂进行CDC反应的有效催化剂。在好氧条件下,在PtII配合物,叔胺和各种亲核试剂(硝基烷,酮或吲哚)的混合物上进行光照射(λ> 420 nm),可以很好地获得优异产率的α-官能化叔胺。光致发光猝灭实验表明,CDC反应是由光诱导的电子从N-苯基四氢异喹啉到PtII络合物的转移引发的。此外,电子自旋共振(ESR)测量清楚地表明了超氧自由基阴离子(O2)的形成。