A well-defined mesoporous amine silica surface via a selective treatment of SBA-15 with ammonia

2D double-quantum H-1-H-1 NMR unambiguously shows that the ``isolated'' Si-OH surface silanols of dehydroxylated SBA-15 are converted upon treatment with ammonia into single silylamine surface site Si-NH2. The ``gem'' di-silanols (= Si(OH)(2)) remain intact. Treatment using HMDS produces (= Si(OSiMe3)(2)) but leaves Si-NH2 untouched. The resulting surface is hydrophobic and stable.


Published in:
CHEMICAL COMMUNICATIONS, 48, 25, 3067-3069
Year:
2012
Publisher:
ROYAL SOC CHEMISTRY
ISSN:
1359-7345
Laboratories:




 Record created 2015-01-08, last modified 2018-03-17


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