Halogen sensing using thin films of crosswise-substituted phthalocyanines

被引:51
作者
Altindal, A
Öztürk, ZZ
Dabak, S
Bekaroglu, Ö
机构
[1] Marmara Univ, Dept Phys, Fac Sci, Istanbul, Turkey
[2] Tubitak Marmara Res Ctr, TR-41470 Gebze, Kocaeli, Turkey
[3] Itu, Dept Chem, Fac Sci, Istanbul, Turkey
关键词
halogen; phthalocyanines; conductivity;
D O I
10.1016/S0925-4005(01)00759-6
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Organic compound phthalocyanines (Pcs) are able to act as chemically sensitive films because of the various physical effects induced in them by interaction with a large number of gases. Specifically, they are used as thin film semiconducting gas sensors for the detection of halogens such as chlorine (Cl-2) and nitrogendioxide (NO2) as well as organic vapors. In a systematic test of different materials, crosswise-substituted with two alkylsulfanyl and two amino groups phthalocyanine films were investigated as sensitive materials for the detection of halogens. The sensing properties of these films were investigated by measuring both de and ac conductivity changes as a function of the gas concentration (0.05-0.15 ppm) at different temperatures (5-75 degreesC). The electrical properties of the films were determined by means of de and ac conductivity measurements under vacuum and without vacuum. The results show that the conductivity curve goes through a maximum at a certain temperature, T-max, depending on the molecular structure of the phthalocyanine films. The gas sensing measurements show that the sensors are highly sensitive to very low concentration of Br-2 and Cl-2 gases. The sensor signals are nearly reversible and reproducible even at room temperature. The crosswise substituted phthalocyanine thin films have good selectivity. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:389 / 394
页数:6
相关论文
共 22 条
[1]   THE INFLUENCE OF IODINE ON THE ELECTRICAL-PROPERTIES OF LEAD PHTHALOCYANINE (PBPC) INTERDIGITAL PLANAR GAS SENSORS [J].
ABASS, AK ;
KRIER, A ;
COLLINS, RA .
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1994, 142 (02) :435-442
[2]  
ABASS K, 1993, J PHYS D, V26, P20
[3]   THE EFFECT OF OXYGEN ON THE ELECTRICAL CHARACTERISTICS OF TRICLINIC LEAD PHTHALOCYANINE [J].
AHMAD, A ;
COLLINS, RA .
THIN SOLID FILMS, 1992, 217 (1-2) :75-82
[4]   SYNTHESIS AND CHARACTERIZATION OF METAL-FREE AND METAL DERIVATIVES OF A NOVEL SOLUBLE CROWN-ETHER-CONTAINING PHTHALOCYANINE [J].
AHSEN, V ;
YILMAZER, E ;
ERTAS, M ;
BEKAROGLU, O .
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1988, (02) :401-406
[5]   SYNTHESIS AND CHARACTERIZATION OF CROWN-ETHER-CONTAINING PHTHALOCYANINES WITH GROUP-IV-A ELEMENTS [J].
AHSEN, V ;
YILMAZER, E ;
GUREK, A ;
GUL, A ;
BEKAROGLU, O .
HELVETICA CHIMICA ACTA, 1988, 71 (07) :1616-1621
[6]   ELECTRICAL AND MAGNETIC-PROPERTIES OF LIQUID-CRYSTALLINE MOLECULAR MATERIALS - LITHIUM AND LUTETIUM PHTHALOCYANINE DERIVATIVES [J].
BELARBI, Z ;
SIRLIN, C ;
SIMON, J ;
ANDRE, JJ .
JOURNAL OF PHYSICAL CHEMISTRY, 1989, 93 (24) :8105-8110
[7]  
Dabak S, 1997, NEW J CHEM, V21, P267
[8]   Electrical resistance of copper phthalocyanine thin films as influenced by substrates, electrodes and physical features of the films [J].
deHaan, A ;
Decroly, A .
SENSORS AND ACTUATORS B-CHEMICAL, 1996, 30 (02) :143-150
[9]   Electrical properties of nickel phthalocyanine (NiPc) sandwich devices incorporating a tetracyanoquinodimethane (TCNQ) layer [J].
Hooper, PD ;
Newton, MI ;
McHale, G ;
Willis, MR .
SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 1997, 12 (04) :455-459
[10]   PREPARATION OF A NOVEL, SOLUBLE COPPER PHTHALOCYANINE WITH CROWN-ETHER MOIETIES [J].
KORAY, AR ;
AHSEN, V ;
BEKAROGLU, O .
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1986, (12) :932-933