ISSN:
1573-4846
Keywords:
ORMOCER
;
organic dye
;
photochromism
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Aluminosilicate and ORMOCER gels and coatings containing photochromic dyes, 1, 3-dihydro-1, 3, 3-trimethylspiro-[2H-indole-2, 3′-[3H]-naphth-[2, 1-b][1, 4]-oxazine] (SO) and 1′, 8a′-dihydro-2′, 3′-dimethoxycarbonyl-spiro [fluorene-9, 1′-indolizine] (DHI), were prepared by the sol-gel method and the photochromic activity was monitored in the course of the sol-wetgel-xerogel transformation. The photochromic activity of the aluminosilicate gels decreases rapidly and even vanishes in the wetgel-xerogel stage while that of ORMOCER gels and coatings levels off in the early wetgel-xerogel stage at a reasonably high photochromic intensity with the colour-fading speed similar to that in ethanol and the photostability being considerably improved. The experimental results are discussed in terms of the matrix effect on photochromism of organic dyes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00486324
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