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Proceedings Paper

Photochromic nanocomposites
Author(s): Edward J. A. Pope
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Paper Abstract

The photochromic organic molecule 2,3-diphenyl indenone oxide (DPIO) has been incorporated into transparent silica gel-PMMA nanocomposites. Under ultraviolet illumination, the colorless DPIO molecule transforms into 1,3-diphenyl-2-benzo-pyrillium-4- oxide (DPBO), which is deep red. Upon exposure to visible light, DPBO transforms reversibly into DPIO. Some DPBO, however, irreversibly decomposes into 3,4-diphenyl isocoumarin (DPIC) and other by-products. In this preliminary study, the rate of photochromic fatigue for a variety of samples of DPIO-doped PMMA, silica gel-PMMA nanocomposites, and ORMOSILs is presented and discussed. The prospects for DPIO-based photochromic materials exhibiting long-term stability are discussed.

Paper Details

Date Published: 13 October 1994
PDF: 12 pages
Proc. SPIE 2288, Sol-Gel Optics III, (13 October 1994); doi: 10.1117/12.188975
Show Author Affiliations
Edward J. A. Pope, Matech (United States)

Published in SPIE Proceedings Vol. 2288:
Sol-Gel Optics III
John D. Mackenzie, Editor(s)

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