Caging ultrafast proton transfer and twisting motion of 1-hydroxy-2-acetonaphthone

被引：111

作者：

Organero, JA ^{[1
]}

Tormo, L ^{[1
]}

Douhal, A ^{[1
]}

机构：

[1] Univ Castilla La Mancha, Dept Quim Fis, Secc Quim, Fac Ciencias Medio Ambiente, Toledo 45071, Spain

来源：

CHEMICAL PHYSICS LETTERS | 2002年 / 363卷 / 3-4期

关键词：

D O I：

10.1016/S0009-2614(02)01233-2

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：

We report on emission studies of 1-hydroxy-2-acetonaphthone (HAN) in solution nanocavities. In neutral water solutions, intramolecular proton transfer in the enol (E*) structure of HAN and a subsequent internal rotation in the formed keto-type tautomer (K*) occur in few tens of ps, to produce a ns-living rotamers (KR*). When caging HAN in cyclodextrins, the dynamics of twisting is greatly affected. Depending on the size of the cage, the isomerization channel leading to KR* can be closed, and emission occurs from K*. In a larger caging cavity, the fast component of the anisotropy decay becomes shorter while the slow one becomes longer. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：409 / 414

页数：6

共 30 条

[1] Orientational dynamics of β-cyclodextrin inclusion complexes [J].