Optical probes in sol-gel silica

摘要

Eu$+3$PLU$/ and UO$-2$/$+2$PLU$/ have been used as optical probes in sol-gel silica. Optical fluorescence and decay times were monitored as a function of processing parameters such as pH and densification temperature, and the optical data were correlated with structural changes in the materials. Fluorescence and decay times of Eu$+3$PLU$/ -UO$-2$/$+2$PLU$/ co-doped materials were studied and energy transfer effects were interpreted in terms of the pore morphology.