ISSN:
1573-4846
Keywords:
photochromic sol-gel materials
;
UV-Vis spectroscopy
;
CuBr microcrystal
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract CuBr containing photochromic sol-gel glasses were synthesized by the introduction of CuBr dissolved in CH3CN into a sol-gel of Al2O3-SiO2 type. Microcrystals of CuBr were developed by a two step heat treatment, the first step in air initially at 280°C/2 h and then at 410°C/2 h for the removal of the organics and the second step at 700°C/2 h in nitrogen atmosphere for the reduction of the copper compounds to Cu+. Photometric measurements of the small gel pieces show a distinct darkening of 24% and a remarkable fading at room temperature of 13% within 10 minutes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1008653732620
