Excited-state intramolecular proton-transfer reaction demonstrating anti-Kasha behavior

被引：118
作者：
Tseng, Huan-Wei [1 ]
Shen, Jiun-Yi [1 ]
Kuo, Ting-Yi [1 ]
Tu, Ting-Syun [1 ]
Chen, Yi-An [1 ]
Demchenko, Alexander P. [2 ]
Chou, Pi-Tai [1 ]
机构：
[1] Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan
[2] Natl Acad Sci Ukraine, Palladin Inst Biochem, UA-01030 Kiev, Ukraine
来源：
CHEMICAL SCIENCE | 2016年 / 7卷 / 01期
关键词：
CHARGE-TRANSFER; FEMTOSECOND DYNAMICS; ELECTRONIC STATES; TRANSFER ESIPT; SINGLET-STATE; FLUORESCENCE; 3-HYDROXYFLAVONE; AZOBENZENE; COMPLEXES; S-2;
D O I：
10.1039/c5sc01945a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We report unusual photophysical properties observed on two newly designed 3-hydroxychromone derivatives exhibiting the excited-state intramolecular proton transfer (ESIPT) reaction. The efficiency of ESIPT reaction is greatly enhanced upon excitation with high energy quanta to S-n (n > 1) levels in low-polarity solvents. Based on detailed analyses of excitation and emission spectra as well as time-resolved emission kinetics we derive that conditions, in which this phenomenon contradicting Kasha's rule is observed, are quite different from that for observation of anti-Kasha emission.
引用
收藏
页码：655 / 665
页数：11
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