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Reference type: Journal
Authors: Carboni D, Malfatti L, Pinna A, Lasio B, Tokudome Y, Takahashi M, Innocenzi P
Article Title: Molecularly imprinted La-doped mesoporous titania films with hydrolytic properties toward organophosphate pesticides.
Publication date: 2013
Journal: New Journal of Chemistry
Volume: 37
Issue: (10)
Page numbers: 2995-3002.
DOI: 10.1039/C3NJ00291H

Abstract: The present work is aimed at developing a titania-based mesoporous film with catalytic properties toward organophosphate pesticides by combining two different approaches: the molecular imprinting and the self-assembly with a supramolecular template. The mesoporosity of the material has been obtained by using a tri-block copolymer (Pluronic F127) as a micellar template while the molecular imprinted cavities have been templated by a complex between La3+ and bis-4-nitro-phenyl-phosphate. The template removal allowed opening, in one step, both the mesopores and the imprinted cavities with a simultaneous estimation of the active sites. The catalytic activity of the molecularly imprinted and not imprinted films toward the pesticide ParaoxonŽ has been evaluated by means of UV-Vis spectroscopy titration of the 4-nitro-phenolate released by the ParaoxonŽ hydrolysis. The analysis of the initial rates of molecularly imprinted and not imprinted films has shown that the presence of a very low number of molecular cavities improves the catalytic properties of the imprinted film when compared to the not imprinted films and the background hydrolysis
Template and target information: bis-4-nitro-phenyl-phosphate La(III) complex

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