Utilize este identificador para referenciar este registo: http://hdl.handle.net/1822/50886

TítuloSpectroscopic characterization of porphyrin-doped sol-gel-derived matrices
Autor(es)Hungerford, Graham
Ferreira, Maria Isabel Pereira Lucas Calado
Pereira, Mário R.
Ferreira, João
Coelho, Anabela
Palavras-chaveSol-gel media
EditoraSpringer Verlag
RevistaJournal of Fluorescence
CitaçãoHungerford, G., Ferreira, M. I. C., Pereira, M. R., Ferreira, J. A., & Coelho, A. F. (2000). Spectroscopic characterization of porphyrin-doped sol-gel-derived matrices. Journal of Fluorescence, 10(3), 283-283
Resumo(s)Absorption and fluorescence spectra were measured for metal free (HTSPP) and zinc (ZnTSPP) sulfonated porphyrins in SiO 2 and TiO 2 matrices produced by the sol-gel technique. These are compared to correspondent data obtained for the two porphyrins in ethanol at different pH values. In the silica medium (acidic), HTSPP is diprotonated and forms aggregates. This effect is found to be reversed on exposure to ammonia vapor and occurs to a much lower degree in titania matrices. This is possibly because of the smaller amount of solvent retained in the pore structure. The main effect of incorporating ZnTSPP in sol-gel-derived matrices is demetallation, although to a lesser extent than in acidic solution.
Versão da editorahttps://link.springer.com/article/10.1023/A:1009405412172
Arbitragem científicayes
Aparece nas coleções:CDF - FAMO - Artigos/Papers (with refereeing)

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