Impedometric herbicide chemosensors based on molecularly imprinted polymers

  • The technique of grafting polymerization has been used for preparation of thin films of molecularly imprinting polymers on the surface of polypropylene membranes and on hydrophobized gold electrodes. The herbicide desmetryn was used as a template. The solid supports used were hydrophobic, while the polymer was hydrophilic. The adsorbed layer of benzophenone, irradiated by UV-light, initiated a radical polymerization near the surface. Polymer films were characterized by weighing, contact angle measurements and impedance spectroscopy. The electrodes coated with the molecularly imprinted polymers displayed fairly specific binding of desmetryn, as detected by the decrease in the capacitance of the electrode. Only small capacitive effects were observed on addition of terbumeton or atrazine, while metribuzine displayed capacitance decrease similar to desmetryn.

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Author: Tanya Panasyuk-Delaney, Vladimir M. MirskyORCiDGND, Mathias Ulbricht, Otto S. WolfbeisGND
DOI:https://doi.org/10.1016/S0003-2670(00)01280-0
ISSN:0003-2670
Title of the source (English):Analytica Chimica Acta
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2001
Tag:Capacitive sensor; Chemical sensor; Grafting polymerization; Molecular imprinting; Photopolymerization
Volume/Year:435
Issue number:1
First Page:157
Last Page:162
Faculty/Chair:Fakultät 2 Umwelt und Naturwissenschaften / FG Nanobiotechnologie
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