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Time-resolved infrared study of the relaxation process of the intramolecular excited-state proton transfer in 2-naphthyl-3-hydroxychromone

✍ Scribed by Michiya Itoh; Tetsuro Yuzawa; Hiromi Mukaihata; Hiro-o Hamaguchi

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 358 KB
Volume: 233
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(94)01494-g

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✦ Synopsis

Sub-microsecond time-resolved infrared spectroscopy has been used to investigate the ground-state relaxation process following the excited-state proton transfer in 2-(2'-naphthyl)-3-hydroxychromone in chloroform. Two transient species with decay times of 5.3 txs (1270 and 1230-1260 cm -1) and 500-600 ixs (1220-1240 cm -l) were observed. These transient species seem to be attributable to ground-state tautomers. This observation is consistent with those by transient absorption and two-step laser-induced fluorescence.

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