Synthesis and Surface Chemistry of Spherical Mesoporous Organic−Inorganic Hybrid Particles with an Integrated Alcohol Functionality on the Pore Surface

Autor:	James T. Cook, Julia Ding, John E. O'Gara, Christopher J. Hudalla, Daniel P. Walsh, Pamela C. Iraneta, Cheryl E. Boissel
Rok vydání:	2004
Předmět:	General Chemical Engineering Epoxide Sorption Alcohol General Chemistry Cyanation chemistry.chemical_compound Monomer Polymerization chemistry Chemical engineering Materials Chemistry Organic chemistry Mesoporous material Protecting group
Zdroj:	Chemistry of Materials. 16:670-681
ISSN:	1520-5002 0897-4756
DOI:	10.1021/cm035014t
Popis:	Novel mesoporous organic−inorganic spherical hybrid particles are described that contain a 3-hydroxypropyl organic functionality which is integral to the pore surface. The 3-hydroxypropyl hybrid particle is synthesized in three steps starting from a 4:1 (mol/mol) mixture of tetraethoxysilane and [3-(methacryloxy)propyl]trimethoxysilane, where the monomers are polymerized to a poly(organoalkoxysilane) oil, followed by sol−gel reaction to the hybrid silicate bead, which is finally subjected to an alkaline hydrothermal treatment to liberate the alcohol from the ester protecting group. The silicate precursor and final product were characterized by NMR spectroscopy and nitrogen sorption analysis. The heterogeneous surface chemistry of the hybrid's alcohol functionality was explored by running a series of classical alcohol reactions including bromination, esterification (carbamic and carbonic), and etherification (Williamson, epoxide ring opening). The brominated analogue was further converted via cyanation and...
Databáze:	OpenAIRE
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