Issue 1, 2016

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

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

Supplementary files

Article information

Article type
Edge Article
Submitted
31 Mai 2015
Accepted
12 Okt 2015
First published
12 Okt 2015
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2016,7, 655-665

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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