Imprint Coating: A Novel Synthesis of Selective Functionalized Ordered Mesoporous Sorbents

Abstract

Molecular imprinting of surfaces of mesoporous sorbents is a novel method for introducing template-selective recognition sites. This method makes use of the unique surface environment of hexagonally packed mesopore surfaces of selected pore sizes (see the schematic representation) and coats such surfaces with functional ligands by binding to a metal ion template.

A Fast-Response pH Optode Based on a Fluoroionophore Immobilized to a Mesoporous Silica Thin Film

“…Using a mesoporous silica host as a solid binding substrate has inherent advantages, such as optical transparency in the visible region, which also enables such silica-based materials to be promising optical sensor substrates. 8 Therefore, mesoporous materials have been applied as optical waveguides 9,10 and for dye-doped optical 3,[11][12][13] sensors. As an example of a dye-doped optical sensor, Yan and coworkers prepared a sensor based on functionalized mesoporous silica, and detected H + and Cu 2+ ions using aqueous buffer solutions with the functionalized mesoporous silica suspended in powder form.…”

Molecularly Imprinted Mesoporous Organosilica

“…Several reports of molecular imprinting in thin films of silica have confirmed that significantly improved target interaction can be achieved by reducing the diffusion length. 4,[8][9][10] Alternatively, surface imprinting on silica eliminates the need for diffusion altogether, 11,12 but in the case of organic molecules, this method does risk sacrificing the size and shape selectivity that can be achieved by creating a closed imprint cavity. Thin films may be useful for sensing and other analytical applications, but if molecularly imprinted silica is to be used for preparative applications or produced in larger quantities for industrial use, a better choice of morphology is silica powder; it can easily be packed into columns or other vessels, suspended in various solvents and then isolated by centrifugation or filtration, and washed and dried for reuse.…”

Synthesis and Characterization of Surface Ion-imprinted Polymer Based on Mesoporous Silica SBA-15 for Selective Removal of Cu(II) from Aqueous Solutions

“…), selectivity coefficient k, and the relative selectivity coefficient k' [29] were given as follows:…”