Soluble phthalocyanines as coatings for quartz-microbalances: specific and unspecific sorption of volatile organic compounds

Various new phthalocyanines (PcMs) species were synthesized which can be dissolved in organic solvents. They turned out to form particularly sensitive coatings on quartz-microbalances (QMBs) for the detection of a variety of volatile organic compounds (VOCs) in the gas phase. A two-step sorption mod...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 1999-09, Vol.57 (1), p.88-98
Main Authors: Fietzek, C., Bodenhöfer, K., Haisch, P., Hees, M., Hanack, M., Steinbrecher, S., Zhou, F., Plies, E., Göpel, W.
Format: Article
Language:English
Subjects:
Dual sorption mode
phthalocyanines
QMB
Soluble phthalocyanines
Sorption enthalpy
VOC detection
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Summary:Various new phthalocyanines (PcMs) species were synthesized which can be dissolved in organic solvents. They turned out to form particularly sensitive coatings on quartz-microbalances (QMBs) for the detection of a variety of volatile organic compounds (VOCs) in the gas phase. A two-step sorption model describes both, the initial highly sensitive response at low concentrations by preferential absorption and the less sensitive response at high concentrations by non-preferential absorption for different analyte/PcM combinations. The thermodynamic evaluation allows to determine the heats of specific interactions from temperature dependent sorption isotherms.
ISSN:0925-4005
1873-3077
DOI:10.1016/S0925-4005(99)00167-7