Thermolytic Synthesis of Imprinted Amines in Bulk Silica

Autor:	Alexander Katz, John D. Bass
Rok vydání:	2003
Předmět:	Thermogravimetric analysis Trimethylsilyl Chemistry General Chemical Engineering Potentiometric titration Thermal decomposition General Chemistry Nuclear magnetic resonance spectroscopy Fluorescence chemistry.chemical_compound Silanol Reagent Polymer chemistry Materials Chemistry Organic chemistry
Zdroj:	Chemistry of Materials. 15:2757-2763
ISSN:	1520-5002 0897-4756
DOI:	10.1021/cm021822t
Popis:	The synthesis of bulk, hydrophilic imprinted silica is reported via a novel method relying on the thermolysis of carbamates. This method is used to synthesize single-site materials consisting of either isolated primary amines or multiple organized primary amines within an imprinted site. Materials are characterized by multinuclear solid-state NMR spectroscopy, high-resolution thermogravimetric analysis, and potentiometric titration. Diffuse-reflectance UV/Vis and solid-state fluorescence spectroscopies of probe molecule-bound materials are used to demonstrate the site-isolated and polar nature of the imprinted sites resulting from this process. The polar nature is due to hydrophilic silanol groups ingenerate to the framework of the material. These permit the partitioning of polar reagents, such as 1,3,5-trinitrobenzenesulfonic acid (TNBS), which are unable to access the imprinted sites when framework silanols are end-capped with hydrophobic trimethylsilyl functionality. The latter observation provides a m...
Databáze:	OpenAIRE
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