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Issue 1, 2016
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Excited-state intramolecular proton-transfer reaction demonstrating anti-Kasha behavior

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Abstract

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 Sn (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.

Graphical abstract: Excited-state intramolecular proton-transfer reaction demonstrating anti-Kasha behavior

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Article information


Submitted
31 May 2015
Accepted
12 Oct 2015
First published
12 Oct 2015

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2016,7, 655-665
Article type
Edge Article

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

H. Tseng, J. Shen, T. Kuo, T. Tu, Y. Chen, A. P. Demchenko and P. Chou, Chem. Sci., 2016, 7, 655
DOI: 10.1039/C5SC01945A

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