Photophysical investigation of the triplet manifold of mono- and bis-phenylethynyl-(2,2′:6′,2"-terpyridine) ruthenium(II) complexes

被引：12

作者：

Benniston, AC ^{[1
]}

Chapman, GM ^{[1
]}

Harriman, A ^{[1
]}

Sams, CA ^{[1
]}

机构：

[1] Univ Newcastle Upon Tyne, Sch Nat Sci Chem, Mol Photon Lab, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

INORGANICA CHIMICA ACTA | 2006年 / 359卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

luminescence; terpyridine; ruthenium; electron delocalisation;

D O I：

10.1016/j.ica.2005.03.046

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A complete photophysical study has been carried out on an octahedral ruthenium(II) complex, incorporating two 4'-phenylethynyl-2,2':6',2"-terpyridine ligands. Weak emission is observed from the complex in fluid solution at room temperature, but both emission yield and lifetime increase as the temperature is lowered. Luminescence is confirmed to occur exclusively from the lowest energy triplet metal-to-ligand, charge-transfer (MLCT) state, though higher-lying MLCT and metal-centered states are required to adequately model the non-radiative decay kinetics. A comparison of parameters associated with deactivation of the complex and its counterpart, where only one terpy ligand incorporates the phenylethynyl unit, indicates that only the electron-vibrational coupling element is affected. It is also revealed that the extent of electron delocalisation at the triplet level does not critically depend on the number of 4-phenylethynyl-2,2':6',2"-terpyridine ligands in the complex. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：753 / 758

页数：6

共 38 条

[1] From ruthenium(II) to iridium(III): 15 years of triads based on bis-terpyridine complexes [J].