Eu3+ as a dual probe for the determination of IL anion donor power: A combined luminescence spectroscopic and electrochemical approach

被引：10

作者：

Babai, Arash

Kopiec, Gabriel

Lackmann, Anastasia

Mallick, Bert

Pitula, Slawomir

Tang, Sifu

Mudring, Anja-Verena ^{[1
]}

机构：

[1] Ruhr Univ Bochum, D-44780 Bochum, Germany

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2014年 / 192卷

关键词：

Acidity; Electrochemistry; Europium; Ionic liquids; Rare-earth elements; IONIC LIQUIDS; SOLVENT POLARITY; EUROPIUM; COMPLEXES; SOLVATOCHROMISM; CATION; DYES;

D O I：

10.1016/j.molliq.2014.03.005

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：

This work is aimed at giving proof that Eu(Tf2N)(3) (Tf2N = bis(trifluoromethanesulfonyl)amide) can act as both an optical and electrochemical probe for the determination of the Lewis acidity of an ionic liquid anion. For that reason the luminescence spectra and cyclic voltammograms of dilute solutions of Eu(Tf2N)(3) in various ionic liquids were investigated. The Eu2+/3+ redox potential in the investigated ILs can be related to the Lewis basicity of the IL anion. The IL cation had little influence. The lower the determined halfwave potential, the higher the IL anion basicity. The obtained ranking can be confirmed by luminescence spectroscopy where a bathochromic shift of the D-5(0) -> F-7(4) transition indicates a stronger Lewis basicity of the IL anion. (C) 2014 Published by Elsevier B.V.

引用

页码：191 / 198

页数：8

共 48 条

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