Anion-selective liquid-polymer optodes with fluorescent pH chromoionophores, tunable dynamic range and diffusion enhanced lifetimes

被引：20

作者：

Shortreed, MR ^{[1
]}

Barker, SLR ^{[1
]}

Kopelman, R ^{[1
]}

机构：

[1] UNIV MICHIGAN,DEPT CHEM,ANN ARBOR,MI 48109

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1996年 / 35卷 / 1-3期

基金：

美国国家卫生研究院;

关键词：

fiber-optic chemical sensor; ETH; 2439; 2412; 5350; ruthenium(II) octaethyl porphyrin; nitrite ionophore I;

D O I：

10.1016/S0925-4005(97)80058-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The present work demonstrates the ability to extend coextraction based anion optodes into the fluorescence regime for the purpose of miniaturization. These optodes utilize standard ion-selective electrode ionophores with universal pH chromoionophores that have been selected for their fluorescence efficiency, photo-stability and pK(a) based tunability of the optimal activity range. The miniaturization of the photo-excitation zone enhances the optode lifetime, due to fast diffusion of unbleached chromoionophores into this zone. Specifically, we provide here examples of charged and neutral-carrier ionophore based fluorescent optodes, one highly selective for nitrite and the other selective for thiocyanate. The ability to tune the dynamic range of the nitrite-selective optode is also demonstrated.

引用

页码：217 / 221

页数：5

共 20 条

[1] ANION SELECTIVITY OF METALLOPORPHYRINS IN MEMBRANES [J].