Multicoordinational excited state twisting of indan-1,3-dione derivatives

被引：15
|
作者：
Karpicz, Renata [1 ]
Getautis, Vytautas [2 ]
Kazauskas, Karolis [1 ]
Jursenas, Saulius [1 ,3 ]
Gulbinas, Vidmantas [1 ,3 ]
机构：
[1] Inst Phys, LT-02300 Vilnius, Lithuania
[2] Kaunas Univ Technol, LT-50270 Kaunas, Lithuania
[3] Vilnius State Univ, LT-10222 Vilnius, Lithuania
来源：
CHEMICAL PHYSICS | 2008年 / 351卷 / 1-3期
关键词：
izomerization; TICT; norradiative relaxation; fluorescence;
D O I：
10.1016/j.chemphys.2008.05.001
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Excited state relaxation of indan-1,3-dione derivatives with different substituents attached to the phenyl ring and with the bridged amino group was investigated by means of the steady-state fluorescence and ferntosecond time-resolved absorption pump-probe spectroscopy. Bridging of the amino group increases the fluorescence quantum yield and the excited state lifetime. Analysis of the results indicates that the phenyl ring twisting around a single central bond leads to the nonradiative state formation and to subsequent fast relaxation to the ground state. Double bond twisting takes place in molecules with the bridged amino group and causes a large Stokes shift and slightly slower excited state relaxation. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：147 / 153
页数：7
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