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Identification of a Vibrational Frequency Corresponding to H‐atom Translocation in Hypericin ¶
Author(s) -
Showalter B. M.,
Datta A.,
Chowdhury P. K.,
Park J.,
Bandyopadhyay P.,
Choudhury P. K.,
Kesavan S.,
Zeng Y.,
Kraus G. A.,
Gordon M. S.,
Toscano J. P.,
Petrich J. W.
Publication year - 2001
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1562/0031-8655(2001)0740157ioavfc2.0.co2
Subject(s) - hypericin , chromosomal translocation , identification (biology) , atom (system on chip) , chemistry , physics , biology , computer science , botany , pharmacology , biochemistry , gene , embedded system
Using time‐resolved infrared spectroscopy, ab initio quantum mechanical calculations and synthetic organic chemistry a region in the infrared spectrum of triplet hypericin has been found between 1400 and 1500 cm −1 corresponding to the translocation of the hydrogen atom between the enol and the keto oxygens, O···H···O. This result is discussed in the context of the photophysics of hypericin and of eventual measurements to observe directly the excited‐state H‐atom transfer.