Dummy molecularly imprinted mesoporous silicates for selective adsorption of 2-naphthol

作者：Luoa, Guitao; Li, Yunping; Wang, An; Lin, Qiang; Zhang, Guolin; Wang, Chun^*

来源：Open Chemistry, 2015, 13(1): 756-762.

DOI：10.1515/chem-2015-0090

• sol-gel preparation
• porous materials
• molecular imprinting
• organosilicates
• 2-naphthol

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.

• 出版日期2015-1
• 单位中国科学院; 海南师范大学; 中国科学院成都生物研究所