Unprecedented 1D Mixed-metal Polynuclear Cyclometalated Platinum Complexes: Synthesis,Structural Characterization and Spectroscopic Properties

• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2007,（12）
• 页码范围: 1821-1826
• 页数: 6页
• 语种: 英文

摘要

The complexes [Pt2L2(μ-dppm)](ClO4)2.(1) and {[Pt2L2(μ-dppm)Li(CH3CN)2](ClO4)3}n (2),where HL is 6-[4-(diethoxyphosphorylmethyl)phenyl]-2,2'-bipyridinyl and dppm is bis(diphenylphosphino)methane,have been synthesized and characterized.In complex 1 the platinum(Ⅱ) center adopts a distorted square planar coordination geometry.The polymer 2 exhibits a "stairstep" configuration with one-dimensional Pt(Ⅱ)N^N^CPO- Li(Ⅰ)-OPC^N^NPt(Ⅱ) mixed-metal units which are linked through dppm.Both complexes have metal-metal interaction with PtPt distances of 3.325(2) and 3.1432(9) (A),respectively,and display strong metal-metal-to-ligand charge-transfer (MMLCT) triplet state emission.The density-functional-theory calculation was used to interpret the absorption spectra of the complexes.