Solution Chemistry of Europium(III) Aqua Ion at Micromolar Concentrations as Probed by Direct Excitation Luminescence Spectroscopy

被引：14

作者：

Andolina, Christopher M. ^{[1
]}

Mathews, Ryan A. ^{[1
]}

Morrow, Janet R. ^{[1
]}

机构：

[1] SUNY Buffalo, Dept Chem, Buffalo, NY 14260 USA

来源：

HELVETICA CHIMICA ACTA | 2009年 / 92卷 / 11期

基金：

美国国家科学基金会;

关键词：

RADIATIONLESS TRANSITIONS; LANTHANIDE COMPLEXES; SPHERE COMPLEXATION; AQUEOUS-SOLUTION; ENERGY-TRANSFER; EXCITED-STATE; TERBIUM(III); LIFETIMES; FREQUENCY; DYNAMICS;

D O I：

10.1002/hlca.200900166

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Direct excitation europium(III) luminescence spectroscopy is used to study the speciation of aqueous europium(III) ions at micromolar concentrations and near neutral pH. The pH and concentration dependence of the europium(III) F-7(0) -> D-5(0) excitation peak is consistent with the formation of both mononuclear and dinuclear europium(III) hydroxide complexes at pH 6.5. Luminescence intensity and lifetime quenching studies in the presence of Nd-III at pH 5.0 and 6.5 support the formation of a dinuclear complex at pH 6.5. Steady state excitation and time-resolved luminescence spectroscopy are consistent with the formation of innersphere nitrate and fluoride complexes, but outersphere perchlorate and chloride complexes at pH 6.5 and 5.0.

引用

页码：2330 / 2348

页数：19

共 32 条

[1] EUROPIUM(III) LUMINESCENCE EXCITATION SPECTROSCOPY - QUANTITATIVE CORRELATION BETWEEN THE TOTAL CHARGE ON THE LIGANDS AND THE 7F0-]-5D0 TRANSITION FREQUENCY IN EUROPIUM(III) COMPLEXES [J].