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

Germain Puccetti, Roger Leblanc

Research output: Contribution to journalArticle

6 Citations (Scopus)

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 languageEnglish
Pages (from-to)57-69
Number of pages13
JournalJournal of Non-Crystalline Solids
Volume258
Issue number1
DOIs
StatePublished - Nov 1 1999

Fingerprint

Chromophores
chromophores
Sol-gels
Doping (additives)
gels
matrices
Gels
interactions
Photoacoustic spectroscopy
carotene
photoacoustic spectroscopy
gelation
Gelation
Carotenoids
Silicon Dioxide
Silica
silicon dioxide
Copper
porosity
copper

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Caging interactions between a dopant chromophore and the sol-gel matrix. / Puccetti, Germain; Leblanc, Roger.

In: Journal of Non-Crystalline Solids, Vol. 258, No. 1, 01.11.1999, p. 57-69.

Research output: Contribution to journalArticle

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