Metal to metal multiple bonds in ordered assemblies

被引：28

作者：

Chisholm, Malcolm H. ^{[1
]}

机构：

[1] Ohio State Univ, Newman Wolfrom Chem Labs, Columbus, OH 43210 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2007年 / 104卷 / 08期

关键词：

mesogens; mixed valency; QUADRUPLE BONDS; RESONANCE-RAMAN; COMPLEXES; MO; DIMOLYBDENUM; TRANSITION; LIGANDS; TRIPLE; ATOMS; STATE;

D O I：

10.1073/pnas.0610364104

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The synthesis and properties of metal-metal (MM) quadruply bonded compounds of molybdenum and tungsten in liquid crystalline phases are described. Covalently linked MM quadruply bonded complexes, dimers of dimers, are shown to give rise to mixed valence complexes upon oxidation and the degree of electron delocalization is shown to be correlated with the M-2 delta bridge pi interactions. Class III behavior or complete delocalization is observed to M-2 to M-2 distances of up to 14 angstrom. When the M-2 unit is attached to oligothiophenes via a carboxylate tether, the photophysical properties of the thienyl units are greatly modified due to M-2 delta-thienyl pi conjugation and spin-orbit coupling. This leads to long-lived emissive states and electroluminescence in solid-state devices.

引用

页码：2563 / 2570

页数：8

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