Free volume dependence of an ionic molecular rotor in Fluoroalkylphosphate (FAP) based ionic liquids

被引：6

作者：

Singh, Prabhat K. ^{[1
]}

Mora, Aruna K. ^{[1
]}

Nath, Sukhendu ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Radiat & Photochem Div, Mumbai 400085, Maharashtra, India

来源：

CHEMICAL PHYSICS LETTERS | 2016年 / 644卷

关键词：

ULTRAFAST TORSIONAL DYNAMICS; THIOFLAVIN-T; SOLVATION DYNAMICS; TEMPERATURE; RELAXATION; VISCOSITY; HYDROXYL; FLUORESCENCE; SEPARATION; ROTATION;

D O I：

10.1016/j.cplett.2015.12.016

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：

The emission properties of Thioflavin-T (ThT), a cationic molecular rotor, have been investigated in two fluoroalkylphosphate ([FAP]) anion based ionic liquids, namely, 1-ethyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate and 1-(2-hydroxyethyl)-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate, over a wide temperature range. The micro-viscosities of ionic liquids around ThT, measured from the emission quantum yield, are found to be quite different from their bulk viscosities. The temperature dependence of the viscosity and the emission quantum yield reveals that, despite the very low shear viscosity of these ILs, the non-radiative torsional relaxation has a strong dependence on the free volume of these [FAP] anion based ILs. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：296 / 301

页数：6

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