TY - JOUR
T1 - Dynamics of excited-state intramolecular proton transfer reactions in piroxicam. Role of triplet states
AU - Cho, Dae Won
AU - Kim, Yong Hee
AU - Yoon, Minjoong
AU - Jeoung, Sae Chae
AU - Kim, Dongho
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1994/8/19
Y1 - 1994/8/19
N2 - The picosecond time-resolved fluorescence and transient absorption behavior of piroxicam at room temperature are reported. The keto tautomer in the excited singlet state (1K*) formed via the fast intramolecular proton transfer (≈ 20 ps) is observed. The short-lived (7.5 ns) triplet state of keto tauomer (3K*) is generated from 1K* in toluene whereas it is hardly observed in ethanol. Consequently, rapid reverse proton transfer takes place from 3K* to the enol triplet state (3E*.
AB - The picosecond time-resolved fluorescence and transient absorption behavior of piroxicam at room temperature are reported. The keto tautomer in the excited singlet state (1K*) formed via the fast intramolecular proton transfer (≈ 20 ps) is observed. The short-lived (7.5 ns) triplet state of keto tauomer (3K*) is generated from 1K* in toluene whereas it is hardly observed in ethanol. Consequently, rapid reverse proton transfer takes place from 3K* to the enol triplet state (3E*.
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U2 - 10.1016/0009-2614(94)00742-X
DO - 10.1016/0009-2614(94)00742-X
M3 - Article
AN - SCOPUS:0012505718
VL - 226
SP - 275
EP - 280
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 3-4
ER -