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- Title
Platinum(II) Schiff Base Complexes as Photocatalysts for Visible-Light-Induced Cross-Dehydrogenative Coupling Reactions.
- Authors
Shelar, Deepak Prakash; Li, Ting‐Ting; Chen, Yong; Fu, Wen‐Fu
- Abstract
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 (nitroalkanes, ketones, or indoles) under aerobic conditions gives α-functionalized tertiary amines in good to excellent yields. The photoluminescence quenching experiment reveals that the CDC reaction is initiated by photoinduced electron transfer from N-phenyltetrahydroisoquinoline to the PtII complex. Further, electron spin resonance (ESR) measurements clearly indicate the formation of superoxide radical anions (O2.−) rather than singlet oxygen (1O2) during the photocatalytic reaction.
- Subjects
PLATINUM compounds; SCHIFF bases; PHOTOCATALYSTS; COUPLING reactions (Chemistry); TERTIARY amines; CHARGE exchange
- Publication
ChemPlusChem, 2015, Vol 80, Issue 10, p1541
- ISSN
2192-6506
- Publication type
Article
- DOI
10.1002/cplu.201500157