Hybrid mesoporous MCM-41 type material containing 1,4-diazobutadiene chelate ligand in the walls

resumo

A new organic-inorganic hybrid mesoporous MCM-41 type material has been synthesised by co-condensation of tetraethyl orthosilicate (TEOS) and 1,4-diazobutadiene (DAB) ligand RN=C(Ph)C(Ph) NR where R = (CH2)(3)Si(OEt)(3), in the presence of cetyltrimethylammonium bromide as the structure-directing agent. Surfactant extraction using acidified methanol leaves a hybrid mesoporous material with periodical hexagonal channels, large pore volume and high specific surface area. The material was characterised by powder X-ray diffraction, transmission electron microscopy, nitrogen gas adsorption, C-13 and Si-29 solid-state NMR, FTIR, elemental and thermogravimetry. The ordered structure and the integrity of the ligand structure are preserved after the extraction step. (C) 2005 Elsevier Ltd. All rights reserved.

palavras-chave

ORGANIC GROUPS; CHANNEL WALLS; SILICA; ORGANOSILICAS; FRAMEWORKS; SIEVES

categoria

Chemistry

autores

Ferreira, P; Nunes, CD; Vaz, PD; Bion, N; Brandao, P; Rocha, J

nossos autores

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