Periodic bifunctional organosilicas synthesised using cationic supramolecular templating

Treuherz, Ben A. and Khimyak, Yaroslav Z. ORCID: (2007) Periodic bifunctional organosilicas synthesised using cationic supramolecular templating. Microporous and Mesoporous Materials, 106 (1-3). pp. 236-245. ISSN 1387-1811

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Bifunctional periodic mesoporous organosilicas containing -CH2-CH2- and -CH{double bond, long}CH- bridges have been synthesised via direct synthesis using cationic surfactant templates. The mesoscopic ordering of the products was confirmed using powder X-ray diffraction and nitrogen adsorption. The local structure of mesocomposites was probed via 13C and 29Si solid-state NMR methods. The application of 1H-13C and 1H-29Si CP/MAS NMR dynamics revealed a complex structure of hybrid walls; organic bridges with different mobilities have been identified. The component with fast CP/MAS kinetics represents organic bridges in the bulk of the pore walls, while the component with slow CP/MAS NMR kinetics is attributable to the organic bridges on the hybrid wall interface. 1H-29Si CP/MAS dynamics also indicates that both bridges are incorporated into the same hybrid framework. The strength of template-framework interactions depends on the nature of incorporated organic bridges. Crown

Item Type: Article
Uncontrolled Keywords: periodic mesoporous organosilica,solid-state nmr,chemistry(all),materials science(all),condensed matter physics,mechanics of materials ,/dk/atira/pure/subjectarea/asjc/1600
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Depositing User: LivePure Connector
Date Deposited: 09 Jul 2021 07:28
Last Modified: 23 Oct 2022 02:37
DOI: 10.1016/j.micromeso.2007.03.005

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