Rhodamine 3B+ ClO4- in water:toluene mixtures - Evidence of water cluster formation

被引：13

作者：

Ferreira, JAB ^{[1
]}

Costa, SMB ^{[1
]}

机构：

[1] Univ Tecn Lisboa, Ctr Quim Estrutural, Inst Super Tecn, Complexo I, P-1049001 Lisbon, Portugal

来源：

CHEMICAL PHYSICS LETTERS | 1999年 / 307卷 / 3-4期

关键词：

D O I：

10.1016/S0009-2614(99)00522-9

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：

Rhodamine 3B perchlorate coexists solubilized in mixtures of water:toluene as a distribution of ion pair (74%) and cation (26%). The quantum yield variation shows that the fluorescence quenching process of the ion pair is diffusion controlled with a rate constant oscillating within the limits of slip and stick boundary conditions. The driving force for the excited-state conversion is the unbalance of electrostatic forces and changes in inter-ionic distances in the water cluster solvation sphere created around the ion pair by dielectric enrichment. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：139 / 146

页数：8

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