PHOTOINDUCED BIPROTONIC TRANSFER IN 4-METHYLUMBELLIFERONE

被引：45

作者：

BARDEZ, E

BOUTIN, P

VALEUR, B

机构：

[1] Laboratoire de Chimie Générale (CNRS URA 1103), Conservatoire National des Arts et Métiers, 75003 Paris

来源：

CHEMICAL PHYSICS LETTERS | 1992年 / 191卷 / 1-2期

关键词：

D O I：

10.1016/0009-2614(92)85383-L

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Steady-state and time-resolved fluorescence studies of 4-methylumbelliferone in acidic ethanol-water and 1-butanol-water mixtures reveal that one water molecule is involved in the rate-limiting step of the phototautomerization process. It is shown that the intermediate species cannot be the cationic form as stated by other authors, but is most likely the anionic form. Moreover, it is concluded that the phototautomer is not zwitterionic but exists only in the neutral keto form. A biprotonic transfer mechanism is proposed.

引用

页码：142 / 148

页数：7

共 22 条

[1] FLUORESCENCE PROPERTIES AND EXCITED-STATE INTERACTIONS OF 7-HYDROXY-4-METHYLCOUMARIN LASER-DYE [J].