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

页码：655 / 665

页数：11

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