Narrow-range optical pH sensors based on luminescent europium and terbium complexes immobilized in a sol gel glass

被引：86

作者：

Blair, S ^{[1
]}

Lowe, MP ^{[1
]}

Mathieu, CE ^{[1
]}

Parker, D ^{[1
]}

Senanayake, PK ^{[1
]}

Kataky, R ^{[1
]}

机构：

[1] Univ Durham, Dept Chem, Durham DH1 3LE, England

来源：

INORGANIC CHEMISTRY | 2001年 / 40卷 / 23期

关键词：

D O I：

10.1021/ic010371w

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The metal-based emission of a series of luminescent europium and terbium complexes incorporating an aromatic chromophore is rendered pH-dependent either through perturbation of the aryl singlet or triplet energy or by modulating the degree of quenching of the lanthanide excited state. Systems exhibiting each of these pathways have been incorporated in thin-film sot gel matrixes and evaluated as pH sensors in static and flow analyses at constant ionic strength. pH-dependent intensity or ratiometric methods, for emission or excitation spectra, have been defined for lanthanide complexes incorporating substituted phenanthridine (pK(a)* from ca. 6.8 to 7.2) or 6-cyanophenanthridine-2-sulfonyl chromophores (pK(a) similar to 7.14 in human serum solution) (lambda (exc) 365 nm, phiH(2)O = 7.2%).

引用

页码：5860 / 5867

页数：8

共 27 条

[21] Dissolved oxygen sensor based on fluorescence quenching of oxygen-sensitive ruthenium complexes immobilized in sol-gel-derived porous silica coatings [J].