K. Maruszewskia et al., SPECTROSCOPIC BEHAVIOR OF K-3[CR(NCS)(6)] COMPLEXES ENTRAPPED IN SILICA GLASSES OBTAINED BY THE SOL-GEL METHOD, Journal of molecular structure, 404(1-2), 1997, pp. 137-140
K-3[Cr(NCS)(6)] complex samples entrapped in silica glass were prepare
d by the sol-gel technique. It has been noticed that the original colo
r of the complex changed gradually from violet to green upon entrapmen
t. This process occurred within several days. Electronic absorption an
d emission spectra obtained during this process, along with the severa
l chemical experiments performed, indicate that the sol-gel matrix ind
uces an exchange of the NCS- ligand with ammonia. (C) 1997 Elsevier Sc
ience B.V.