Crown-ether lutetium bisphthalocyanine Langmuir-Blodgett films as gas sensors

被引：33

作者：

RodriguezMendez, M ^{[1
]}

Souto, J ^{[1
]}

deSajaGonzalez, J ^{[1
]}

deSaja, JA ^{[1
]}

机构：

[1] FAC CIENCIAS,DPTO FIS MAT CONDENSADA CRISTALOG & MINERAL,E-47011 VALLADOLID,SPAIN

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1996年 / 31卷 / 1-2期

关键词：

crown-ether lutetium bisphthalocyanine; Langmuir-Blodgett film; gas sensor;

D O I：

10.1016/0925-4005(96)80016-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The gas adsorption and electrochromic properties of Langmuir-Blodgett films of octa-(15-crown-5)-lutetium bisphthalocyanine (CR-Pc(2)Lu) are reported. Films of CR-Pc(2)Lu were sensitive to electron donor and electron acceptor gases as well as tobacco smoke. The adsorption was traced using electronic absorption spectroscopy. The presence of crown ether groups on the phthalocyanine ring increased the sensitivity of the films to oxidizing gases. Stable red films were prepared using 0.01 M HCl as a subphase. Red films were also obtained by chemical oxidation. The use of previously oxidized LB films as the active layer highly increases the sensitivity of the proposed sensor towards electron donor gases. The possibility of discriminating between the main and the side streams of the tobacco smoke, as well as the sensitivity to increasing amounts of smoke, were studied.

引用

页码：51 / 55

页数：5

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