By using 3-glycidoxypropyltrimethoxysilane (GPTMS), methyltrimethoxysilane (MTMS) and vinyltriethoxysilane (VTES) respectively as organically modifying precursors, three types of organically modified silicate (ormosil) glass co-doped with Eu^3＋ ion, β-diketone 2-thenoyltrifluoroacetone (TTA) and synergic agent 1,10-phenanthroline (phen) were prepared via in situ sol-gel method. The photoluminescence (PL) and infrared absorption (IR) spectra, XRD, SEM and TG-DSC measurements were performed. The influence of the organically modifying precursors and heat-treatment temperatures on the thermal, mechanical and photoluminescence properties of rare earth organic complex doped silica glass was also investigated. The results indicated that the organically modifying precursors could densify the gel glass, but the thermal stability was reduced simultaneously. As for the photoluminescence property, it could be improved by MTMS and VTES to some degree, but the maximum contents should be less than 50% to avoid the opacification. GPTMS could increase the photoluminescence of the gel greatly. Considering the thermal stability, mechanical and photoluminescence properties in a whole, the optimum contents were chosen. The results can provide certain basis to manufacture high photoluminescence silica gel glass materials containing europium ion in the future.

Key words: sol-gel method, in situ synthesis, photoluminescence, ormosil