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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Covalent attachment of 4-amino-1,8-naphthalimides onto the walls of mesoporous molecular sieves MCM-41 and SBA-15

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Autor(es):
Trindade, Fabiane de Jesus [1] ; Queiruga Rey, Jose Fernando [1] ; Brochsztain, Sergio [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Fed ABC, Petr Nanotechnol Grp, BR-09210170 Santo Andre, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: DYES AND PIGMENTS; v. 89, n. 2, p. 97-104, MAY 2011.
Citações Web of Science: 16
Resumo

This work describes the covalent grafting of 4-amino-1,8-naphthalimides, which are fluorescent dyes with very interesting optical properties, onto the walls of mesoporous molecular sieves. The mesoporous materials MCM-41 and SBA-15 were first treated with 3-aminopropyltriethoxysilane, generating amine-rich surfaces that were further reacted with 4-amino-1,8-naphthalic anhydride, resulting in yellow fluorescent solids. The success of the modification reactions was confirmed by elemental analysis, X-ray diffraction patterns, infrared spectroscopy, scanning electron microscopy and UV/visible and fluorescence spectroscopy. The emission spectra of the dye bound to MCM-41 was quite insensitive to solvent polarity, in contrast to dye-grafted SBA-15, which showed a high solvent sensitivity. These results suggest a tight fit of the dye molecules within the channels of MCM-41, leaving no room for the solvent molecules. In the case of SBA-15. the large pore size allows the invasion of the channels by solvent molecules, resulting in solvation of the encaged chromophore. (C) 2010 Elsevier Ltd. 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
Linha de fomento: 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
Linha de fomento: Auxílio à Pesquisa - Regular