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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.)

Inclusion complexes of cyclodextrins with 4-amino-1,8-naphthalimides (part 2)

Texto completo
Autor(es):
Goncalves Silva, Barbara Perez [1] ; Marcon, Rodrigo Oliveira [2] ; Brochsztain, Sergio [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Fed ABC, BR-09210170 Santo Andre, SP - Brazil
[2] Univ Mogi das Cruzes, Ctr Interdisciplinar Invest Bioquim, BR-08780911 Mogi Das Cruzes, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY; v. 68, n. 3-4, p. 313-322, DEC 2010.
Citações Web of Science: 3
Resumo

Fluorescence spectroscopy was used to characterize inclusion compounds between 4-amino-1,8-naphthalimides (ANI) derivatives and different cyclodextrins (CDs). The ANI derivatives employed were N-(12-aminododecyl)-4-amino-1,8-naphthalimide (mono-C(12)ANI) and N,N'-(1,12-dodecanediyl)bis-4-amino-1,8-naphthalimide (bis-C(12)ANI). The CDs used here were alpha-CD, beta-CD, gamma-CD, HP-alpha-CD, HP-beta-CD and HP-gamma-CD. The presence of CDs resulted in pronounced blue-shifts in the emission spectra of the ANI derivatives, with increases in emission intensity. This behavior was parallel to that observed for the dyes in apolar solvents, indicating that inclusion complexes were formed between the ANI and the CDs. Mono-C(12)ANI formed inclusion complexes of 1:1 stoichiometry with all the CDs studied. Complexes with the larger CDs (HP-beta-CD, HP-gamma-CD and gamma-CD) were formed by inclusion of the chromophoric ANI ring system, whereas the smaller CDs (alpha-CD, HP-alpha-CD and beta-CD) formed complexes with mono-C(12)ANI by inclusion of the dodecyl chain. Bis-C(12)ANI formed inclusion complexes of 1:2 stoichiometry with HP-beta-CD, HP-gamma-CD and gamma-CD, but did not form inclusion complexes with alpha-CD, HP-alpha-CD and beta-CD. The data were treated in the case of the large CDs using a Benesi-Hildebrand like equation, giving the following equilibrium constants: mono-C(12)ANI:HP-beta-CD (K (11) = 50 M(-1)), mono-C(12)ANI:HP-gamma-CD (K (11) = 180 M(-1)), bis-C(12)ANI:HP-beta-CD (K (12) = 146 M(-2)), bis-C(12)ANI:HP-gamma-CD (K (12) = 280 M(-2)). (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