Effect of electronic structure of energy transfer in bimetallic Ru(ii)/Os(ii) complexes

被引：1
|
作者：
Dai, Weijun [1 ]
Yu, Shiwen [1 ]
Kong, Ci [1 ]
Zhao, Defang [1 ]
He, Chixian [1 ]
Liu, Zining [1 ]
Dong, Jianwei [1 ]
Liu, Jian-Jun [1 ]
Cheng, Feixiang [1 ]
机构：
[1] Qujing Normal Univ, Coll Chem & Environm Sci, Qujing 655011, Peoples R China
来源：
DALTON TRANSACTIONS | 2023年 / 52卷 / 04期
关键词：
ABSORPTION-SPECTRA; ELECTROCHEMICAL-BEHAVIOR; PHOTOPHYSICAL PROPERTIES; LUMINESCENCE PROPERTIES; INTERCOMPONENT ENERGY; COMPETITIVE ENERGY; RUTHENIUM(II); DINUCLEAR; LIGANDS; LIFETIMES;
D O I：
10.1039/d2dt03709b
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Novel monometallic (mu-LL ')Ru, Ru(mu-LL '), homobimetallic Ru(mu-LL ')Ru, and heterodimetallic Ru(mu-LL ')Os and Os(mu-LL ')Ru complexes based on two asymmetrical ligands LL ' (where LL ' = (LL1 ')-L-1, (LL2 ')-L-2) have been synthesized and characterized. Spectroscopic analysis indicates that all complexes exhibit intense spin-allowed ligand-centered (LC) transitions at 288 nm and Ru-based moderate spin-allowed MLCT absorption between 440-450 nm. The Ru(mu-LL ')Os and Os(mu-LL ')Ru dinuclear complexes show Os-based unit absorption in the range of 565-583 nm. The Ru-based units of the complexes present different emission intensities due to differing steric hindrance at the coordination sites of the two bridging ligands. The Os(mu-LL ')Ru dinuclear complexes present weaker emission intensity than their parent monometallic complexes (mu-LL ')Ru. These results indicate that the emission of Os(mu-LL ')Ru dinuclear complexes is quenched by the Os(ii)-based units.
引用
收藏
页码：990 / 999
页数：10
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