Stepwise interactions, sodium ion photoejection and proton-transfer inhibition in a crown-ether and proton-transfer dye

被引：18

作者：

Douhal, A ^{[1
]}

Roshal, AD ^{[1
]}

Organero, JA ^{[1
]}

机构：

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

来源：

CHEMICAL PHYSICS LETTERS | 2003年 / 381卷 / 3-4期

关键词：

D O I：

10.1016/j.cplett.2003.10.027

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：

In this Letter, we report on UV-Vis absorption and steady-state and time-resolved emission studies of 4'-monoaza-15-crown-5-flavonol (CF) complexed to Na+ in acetonitrile. At the ground state, we observed a stepwise CF:(Na)(2) complex formation. At S-1, a fast intramolecular charge-transfer event induces ejection of sodium cation from the crown-ether part and photoproduces a complex not observed at S-0. The proton-transfer reaction normally occurring in free CF is not observed in the photoproduced complex where the sodium ion interacts with the proton-accepting group. The time constant of decomplexation of sodium from the crown-ether ring is less than 10 ps. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：519 / 525

页数：7

共 24 条

[1] Complexation properties of Schiff bases containing the N-phenylaza-15-crown-5 moiety [J].