Excited-state absorption of mono-, di- and tri-nuclear cyclometalated platinum 4,6-diphenyl-2,2′-bipyridyl complexes

被引:15
|
作者
Li, Yunjing [1 ]
Pritchett, Timothy M. [2 ]
Shao, Pin [1 ]
Haley, Joy E. [3 ,4 ]
Zhu, Hongjun [1 ]
Sun, Wenfang [1 ]
机构
[1] N Dakota State Univ, Dept Chem & Mol Biol, Fargo, ND 58108 USA
[2] USA, Res Lab, AMSRD ARL SE EM, Adelphi, MD 20783 USA
[3] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA
[4] Universal Energy Syst Inc, Dayton, OH 45432 USA
关键词
Triplet excited-state absorption cross-section; Singlet excited-state absorption cross-section; Excited-state lifetime; Triplet quantum yield; Cyclometalated platinum(II) 4,6-diphenyl-2,2 '-bipyridyl complexes; Z-scan; PHOTOPHYSICS;
D O I
10.1016/j.jorganchem.2009.07.045
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The ground-state absorption cross-sections (sigma(g)), triplet excited-state absorption cross-section (sigma(T)) at 532 nm, singlet excited-state absorption cross-sections (sigma(s)) at various visible wavelengths, singlet and triplet excited-state lifetimes, and triplet quantum yields of three cyclometalated platinum(II) 4,6-diphenyl-2,2'-bipyridyl complexes, are reported. The presence of metal-metal and pi-pi interactions in the dinuclear and trinuclear complexes results in a significant increase in their respective sigma(g)'s in the visible spectral region. As a result, the ratio of sigma(s)/sigma(g) and sigma(T)/sigma(g) at each wavelength is significantly greater for the mononuclear complex than for the dinuclear and the trinuclear complexes. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:3688 / 3691
页数:4
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