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Unprecedented 1D Mixed‐metal Polynuclear Cyclometalated Platinum Complexes: Synthesis, Structural Characterization and Spectroscopic Properties
Author(s) -
CAO QianYong,
GAN Xin,
ZHANG JunFeng,
CHI ShaoMing,
LI HuiFangjie,
FU WenFu
Publication year - 2007
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200790336
Subject(s) - chemistry , platinum , metal , crystallography , density functional theory , ligand (biochemistry) , stereochemistry , computational chemistry , organic chemistry , catalysis , biochemistry , receptor
The complexes [Pt 2 L 2 ( μ ‐dppm)](ClO 4 ) 2 ( 1 ) and {[Pt 2 L 2 ( μ ‐dppm)Li(CH 3 CN) 2 ](ClO 4 ) 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)NˆNˆCPO‐ Li(I)‐OPCˆNˆNPt(II) mixed‐metal units which are linked through dppm. Both complexes have metal‐metal interaction with Pt–Pt distances of 3.325(2) and 3.1432(9) Å, 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.