Reversible and selective detection of NO2 by means of optical fibres

被引：19

作者：

Baldini, F

Capobianchi, A

Falai, A

Mencaglia, AA

Pennesi, G

机构：

[1] CNR, IROE, I-50127 Florence, Italy

[2] CNR, ICMAT, Ist Chim Mat, I-00016 Rome, Italy

[3] Prodotec, I-50127 Florence, Italy

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2001年 / 74卷 / 1-3期

关键词：

optical fibres; nitrogen oxides; bis-phthalocyanine; optoelectronic unit;

D O I：

10.1016/S0925-4005(00)00706-1

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A sandwich-type metal diphthalocyanine, bis(pthalocyaninato)titanium(IV) [Ti(Pc)(2)], is proposed as a selective chemical transducer for the optical detection of nitrogen dioxide (NO2). An alumina disc was used as a solid support for the immobilisation of the transducer, by means of evaporation from a Ti(Pc)(2) solution in toluene, and was placed in a suitable flow-cell. Through interaction with nitrogen dioxide, this compound underwent spectral changes in the red and green components of the visible spectrum. The optical characterisation of the optode was carried out by an appropriate optoelectronic unit, which was connected to the flow-cell by a single optical fibre. Appropriate treatment with UV light made the optode fully reversible. The optode developed was found to be very selective, and no interference coming from other gases was observed. A detection limit of 0.6 ppm was obtained. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：12 / 17

页数：6

共 11 条

[1]

Ackermann-liebrich U., 1999, Air pollution and health, P559

[2] A new sandwich-type diphthalocyanine as a potential optical transducer for NO2 detection [J].