Clathrates as coating materials for dielectric transducers with regard to organic solvent vapour sensors

• Published in: Sensors and actuators. B, Chemical Vol. 26; no. 1; pp. 158 - 161
• Main Authors: Buhlmann, Klaus, Reinbold, Jörg, Cammann, Karl, Shul'ga, Alexandre A., Sundermeier, Christian, Knoll, Meinhard, Wierig, Andreas, Weber, Edwin
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 1995; Amsterdam Elsevier; New York, NY
• Subjects: Analytical chemistry; Chemistry; Clathrates; Dielectric transducers; Exact sciences and technology; Gas sensors; General, instrumentation; Dielectric transducers; Gas sensors; Clathrates; Clathrate; Artificial membrane; Reversible reaction; Halocarbon; Organic solvent; Sensitivity; Vapor phase; Response time; Reproducibility; Polyvinyl chloride; Capacitor; Fluorene derivatives; Gas detector
• ISSN: 0925-4005; 1873-3077
• DOI: 10.1016/0925-4005(94)01578-6

The interdigitated capacitor using 2,2′-bis(9-hydroxy-9-fluorenyl)biphenyl (
1 as inclusion host, embedded in a polymer matrix (polyvinyl chloride with a plasticizer) as coating material, shows a sensitivity to organic solvent vapours. The sensitivity depends on the host compound contents in the membrane. The bset results have been obtained for the PVC membrane containing 27%
1 and 57% 2-fluorophenyl 2-nitrophenyl ether as plasticizer. The sensor demonstrates reproducible, reversible responses with a response time of 1–2 min when exposed to vapours of dichloromethane and tetrachloroethylene with concentrations in the range 0.05–3.5 vol.%, while being about 10 times more sensitive to tetrachloroethylene.