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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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Publication details

The article was received on 31 May 2015, accepted on 12 Oct 2015 and first published on 12 Oct 2015


Article type: Edge Article
DOI: 10.1039/C5SC01945A
Citation: Chem. Sci., 2016,7, 655-665
  • Open access: Creative Commons BY-NC license
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    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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