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Reference type: Journal
Authors: Luoa GT, Li YP, Wang A, Lin Q, Zhang GL, Wang C
Article Title: Dummy molecularly imprinted mesoporous silicates for selective adsorption of 2-naphthol.
Publication date: 2015
Journal: Open Chemistry
Volume: 13
Issue: (1)
Page numbers: 756-762.
Alternative URL: http://www.degruyter.com/view/j/chem.2015.13.issue-1/chem-2015-0090/chem-2015-0090.xml

Abstract: Dummy molecularly imprinted mesoporous silicates (MIMS-2) were made by co-condensation of tetraethyl orthosilicate (TEOS) with precursors of bi-functional mimic of 2-naphthol, 2,7-dihydroxynaphthalene, around triblock copolymer surfactant Pluronic (P123) micelles. The bi-functional template was linked to two functional monomers through thermally cleavable covalent bonds to generate imprint precursor. This provides the possibility of incorporating the target into the cross-linked mesoporous silicate matrix in the non-ionic surfactant templated sol-gel process. P123 was eluted by ethanol extraction and template molecules were removed by refluxing the materials in a mixture of dimethyl sulfoxide (DMSO) and water. MIMS-1 was prepared similarly except that 2-naphthol was used as template instead of 2,7-dihydroxynaphthalene. Solid phase extraction studies showed that MIMS-2 exhibited good retention and selectivity for 2-naphthol among its structural analogues. The mono-functional molecule 2-naphthol was unable to be incorporated into the silica matrix of mesoporous material by the identical method, and the resulting material MIMS-1 exhibits poor selectivity to the template analogues.
Template and target information: dummy template, 2,7-dihydroxynaphthalene, 2-naphthol
Author keywords: sol-gel preparation, porous materials, molecular imprinting, organosilicates, 2-naphthol

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