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The excited state intramolecular proton transfer (ESIPT) reaction reversibility was reexamined both experimentally and theoretically on the example of a series of 3-hydroxychromone (3HC) derivatives. The experimental reversibility criteria for the excited state adiabatic photoreactions based on dynamic quenching of two-banded 3HC fluorescence were re-deduced. Quenching experiments in the series of...
Two isomeric pyrazole derivatives of 3-hydroxychromone (3HC) with and without the possibility of the multiple intramolecular hydrogen bonds formation were compared theoretically and experimentally with the aim to find out whether the excited state intramolecular proton transfer (ESIPT) reaction follows the traditional to the most of 3HCs “flavonol-like” direction towards the CO group oxygen or an...
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