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Proceedings Paper

Fluorescence depolarization studies of sol-gel-derived glasses using a rigidochromic probe
Author(s): John McKiernan; Jeffrey I. Zink; Bruce S. Dunn
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Paper Abstract

The rigidochromic molecule rhenium(I)chlorotricarbonyl-2,2'-bipyridine was used in fluorescence depolarization experiments to probe the gelation, aging, and drying of silica and aluminosilicate sol-gel derived materials. These studies indicate that the local environment of the probe is fluid until well after gelation has occurred. Aluminosilicate gels show an increase in local viscosity after gelation while silica gels show no increase until the drying stage is begun. These results are compared to previous studies in which the shift of the emission band was used to indicate the rigidity in the local environment of the probe.

Paper Details

Date Published: 7 December 1992
PDF: 6 pages
Proc. SPIE 1758, Sol-Gel Optics II, (7 December 1992); doi: 10.1117/12.132029
Show Author Affiliations
John McKiernan, Univ. of California/Los Angeles (United States)
Jeffrey I. Zink, Univ. of California/Los Angeles (United States)
Bruce S. Dunn, Univ. of California/Los Angeles (United States)

Published in SPIE Proceedings Vol. 1758:
Sol-Gel Optics II
John D. Mackenzie, Editor(s)

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