Modification of molecular sieves MCM-41 and SBA-15 with covalently grafted pyromellitimide and 1,4,5,8-naphthalenediimide

Autor(es)

Trindade, Fabiane Jesus ^[1] ; Rey, Jose Fernando Queiruga ^[1] ; Brochsztain, Sergio ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed ABC, Petr Nanotechnol Grp, BR-09210170 Santo Andre, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Colloid and Interface Science; v. 368, p. 34-40, FEB 15 2012.
• Citações Web of Science: 10

Resumo

This article describes the covalent grafting of pyromellitimide and 1,4,5,8-naphthalenediimide, which are organic semiconductors with very interesting electro-optical properties, onto the walls of mesoporous molecular sieves. The mesoporous materials MCM-41 and SBA-15 were first treated with 3-aminopropyl-triethoxysilane, generating materials with a surface coverage of primary amino groups. These materials were further reacted with either pyromellitic dianhydride or 1,4,5,8-naphthalenetetracarboxylic dianhydride, generating surface-bound pyromellitimide or 1,4,5,8-naphthalenediimide, respectively. The success of the modification reactions was confirmed by elemental and thermogravimetric analyses, X-ray diffraction patterns and infrared, reflectance and fluorescence spectroscopies. The results indicated that the mesoporous structure of the new materials was preserved after the modification reactions and that the chromophores were included inside the mesoporous channels with stacked aromatic rings. (C) 2011 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 08/57940-7 - Produção de biocombustíveis por craqueamento fotoquímico de óleos vegetais utilizando imidas aromáticas suportadas em sílicas mesoporosas como sensitizadores
• Beneficiário: Sergio Brochsztain
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular
• Processo FAPESP: 05/51104-4 - Preparação de cápsulas ocas revestidas com camadas de imidas aromáticas para o armazenamento de energia solar
• Beneficiário: Sergio Brochsztain
• Modalidade de apoio: Auxílio à Pesquisa - Regular