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Hydrosilylated Allyl‐silica Hybrid Monolithic Columns by Li Li; Luis A. Colón is a Chemistry article available to read on EtoBox.

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## Abstract Organic–inorganic silica hybrid monolithic columns were synthesized containing an allyl pendant. The ally‐monolithic columns were then modified __via__ hydrosilylation reactions to introduce further surface functionalization. The approach was demonstrated by functionalizing allyl‐monolytic columns with __n__‐octyl‐dimethylsilane (C~8~‐DMS) and benzyl‐dimethylsilane (benzyl‐DMS). Of the surface available ally groups on the hybrid monolith (__i.e__., 6.79 μmol/m^2^), 31.3% reacted __via__ hydrosilylation, resulting in a C~8~ surface coverage of 2.12 μmol/m^2^. When using benzyl‐DMS, a surface coverage of 1.95 μmol/m^2^ was calculated for the benzyl groups. The retentivity of the hybrid monolithic columns increased considerably after the hydrosilylation, as monitored by CLC and CEC. The largest increase in retention was observed with the C~8~ modified monolith. The hybrid monolithic columns showed higher hydrolytic stability than monolithic columns prepared by the conventional silanoxane bonding of alkyl chlorosilanes modification. The ally‐monolithic column provides a platform for the fabrication of hybrid monoliths that can be conveniently modified by means of hydrosilyl

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Author

Li Li; Luis A. Colón

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 1615-9306)

Published

2009

Language

CY

Field

Chemistry (Physical Sciences)