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11 December 2002 Internal Stark effect mediates intramolecular excited-state proton transfer in 3-hydroxyflavone derivatives
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Proceedings Volume 4938, Selected Papers from the International Conference on Spectroscopy of Molecules and Crystals; (2002) https://doi.org/10.1117/12.486637
Event: XV International School on Spectroscopy of Molecules and Crystals, 2001, Chernivsti, Ukraine
Abstract
Internal Stark effect in electronic spectra is the effect that is observed when the electronic bands shift udner the influence of promixal charges. In order to study the possible involvement of this effect in modulating the intramolecular proton transfer reactions in the excited state, we designed and studied several derivatives of 3-hydroxyflavone. They include the species containing neutral and positively charged substituents in 6 position of chromone ring. These compounds were studied in solvents of different polarities. In these experiments the shifts of both normal and tautomer flurosence bands are clearly observed in a manner predicted by Stark effect theory. In addition, a dramatic effect of suppression by introduced charge of intramolecular excited-state proton transfer was observed.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Andriy S. Klymchenko and Alexander P. Demchenko "Internal Stark effect mediates intramolecular excited-state proton transfer in 3-hydroxyflavone derivatives", Proc. SPIE 4938, Selected Papers from the International Conference on Spectroscopy of Molecules and Crystals, (11 December 2002); doi: 10.1117/12.486637; https://doi.org/10.1117/12.486637
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