Highly selective and reversible optical, colorimetric, and electrochemical detection of mercury(II) by amphiphilic ruthenium complexes anchored onto mesoporous oxide films

被引：150

作者：

Nazeeruddin, MK ^{[1
]}

Di Censo, D ^{[1
]}

Humphry-Baker, R ^{[1
]}

Grätzel, M ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Fac Basic Sci, Inst Chem Sci & Engn, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland

来源：

ADVANCED FUNCTIONAL MATERIALS | 2006年 / 16卷 / 02期

关键词：

D O I：

10.1002/adfm.200500309

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The colorimetric, fluorimetric, and electrochemical detection of mercury ions by funct ionalized ruthenium sensitizers in aqueous and non-aqueous solutions and on anchored TiO2 films are investigated. Mercury ions coordinate reversibly to the ruthenium sensitizers, inducing a color change and increasing the phosphorescence intensity significantly. The electrochemical data of the adsorbed sensitizer on TiO2 films show a reversible couple, owing to the percolation through electronic couplings between -NCS ligands of neighboring molecules; upon exposure to a Hg2+-containing solution, the electrical signal is appreciably reduced. The detection limit for mercury(II) ions using UV-vis spectroscopy in homogeneous aqueous solutions is estimated to be similar to 20 ppb. The results presented herein have important implications in the development of reversible colorimetric, fluorimetric, and electrochemical on-off sensors based oil. nanocrystalline semiconductor films for the simple, swift, and selective detection of mercury ions in solution.

引用

页码：189 / 194

页数：6

共 30 条

[1] Fluorometric chemosensors.: Interaction of toxic heavy metal ions PbII, CdII, and HgII with novel mixed-donor phenanthroline-containing macrocycles:: Spectrofluorometric, conductometric, and crystallographic studies [J].