Caging interactions between a dopant chromophore and the sol-gel matrix

Germain Puccetti; Roger M. Leblanc

doi:10.1016/S0022-3093(99)00539-6

Caging interactions between a dopant chromophore and the sol-gel matrix

Germain Puccetti, Roger M. Leblanc

Chemistry

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

The successful incorporation of chromophores in a sol-gel matrix requires a careful study of their interaction with the gel environment. Photoacoustic spectroscopy is used to probe chemical changes in the direct neighborhood of dopant molecules in a silica-based sol gel during times of evolution up to 100 times the gelation time. Studies of different chromophores such as β-carotene (β-Car.) and copper phthalocyanine (Cu-Pht.) show a size dependent steric hindrance effect as well as chromophore relaxation phenomena within the gel pores. Three main phases of evolution of the medium are distinguished. The stability of the chromophores is discussed and the results compared to FTIR spectra over time.

Original language	English (US)
Pages (from-to)	57-69
Number of pages	13
Journal	Journal of Non-Crystalline Solids
Volume	258
Issue number	1
DOIs	https://doi.org/10.1016/S0022-3093(99)00539-6
State	Published - Nov 1999

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Materials Chemistry

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AB - The successful incorporation of chromophores in a sol-gel matrix requires a careful study of their interaction with the gel environment. Photoacoustic spectroscopy is used to probe chemical changes in the direct neighborhood of dopant molecules in a silica-based sol gel during times of evolution up to 100 times the gelation time. Studies of different chromophores such as β-carotene (β-Car.) and copper phthalocyanine (Cu-Pht.) show a size dependent steric hindrance effect as well as chromophore relaxation phenomena within the gel pores. Three main phases of evolution of the medium are distinguished. The stability of the chromophores is discussed and the results compared to FTIR spectra over time.

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Caging interactions between a dopant chromophore and the sol-gel matrix

Abstract

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