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Reference type: Journal
Authors: Ling TR, Syu YZ, Tasi YC, Chou TC, Liu CC
Article Title: Size-selective recognition of catecholamines by molecular imprinting on silica-alumina gel.
Publication date: 2005
Journal: Biosensors and Bioelectronics
Volume: 21
Issue: (6)
Page numbers: 901-907.
DOI: 10.1016/j.bios.2005.02.009
Alternative URL: http://www.sciencedirect.com/science/article/B6TFC-4FRB7W1-3/2/608f424c7e8fe7ac528a584090b8b0da

Abstract: The preparation of a catecholamine receptor was carried out using a molecular imprinting method with silica-alumina gel to form complementary structures for template recognition. The molecularly imprinted polymer (MIP) was synthesized by the condensation of silicate from tetraethyl orthosilictate (TEOS) under hydrothermal conditions at 60 [deg]C. Aluminum chloride was added as a functional monomer to increase the material's rebinding ability. The selectivity of the MIP receptor prepared with different ratios of template to Si and Al, was examined with seven analytes including: dopamine, epinephrine, norepinephrine, ascorbic acid, homovanillic acid, uric acid, and l-tyrosine. The results showed a size selective effect for the receptors with respect to the recognition of the catecholamines. Some factors affecting the recognition ability were investigated including: the solution pH of analytes, surface capping on the MIP, and the imprinting pH of the silica-alumina solution. Also, the catecholamine MIP films on quartz crystal microbalance (QCM) electrodes were fabricated as sensors for in situ monitoring of the analytes in a 2-propanol solution
Template and target information: dopamine, epinephrine, norepinephrine, ascorbic acid, homovanillic acid, uric acid, l-tyrosine
Author keywords: catecholamines, molecular imprinting, Silica-alumina gel

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