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Issue 10, 2013
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Molecularly imprinted La-doped mesoporous titania films with hydrolytic properties toward organophosphate pesticides

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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 Paraoxon® has been evaluated by means of UV-Vis spectroscopy titration of the 4-nitro-phenolate released by the Paraoxon® 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.

Graphical abstract: Molecularly imprinted La-doped mesoporous titania films with hydrolytic properties toward organophosphate pesticides

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Publication details

The article was received on 20 Mar 2013, accepted on 25 May 2013 and first published on 28 May 2013


Article type: Paper
DOI: 10.1039/C3NJ00291H
Citation: New J. Chem., 2013,37, 2995-3002
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    Molecularly imprinted La-doped mesoporous titania films with hydrolytic properties toward organophosphate pesticides

    D. Carboni, L. Malfatti, A. Pinna, B. Lasio, Y. Tokudome, M. Takahashi and P. Innocenzi, New J. Chem., 2013, 37, 2995
    DOI: 10.1039/C3NJ00291H

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