Synthesis, characterization, and photophysical properties of europium complex-functionalized fumed silica and its corresponding PMMA-doped composites†

Lanthanide organic–inorganic hybrid fluorescent materials are considered as promising candidates for next-generation lighting materials due to their unique optical properties and potential applications. In this work, commercialized silica materials (fumed silica) were selected as the carrier. By means of the bridging function of silane coupling agents, Eu(TTA)₃(Phen) was covalently grafted onto the surface of fumed silica to synthesize lanthanide hybrid phosphors. Subsequently, the phosphor was dispersed into the MMA polymerization system, and a monolithic fluorescent organic glass was fabricated via in situ polymerization. Both the obtained europium hybrid phosphor and the europium complex-doped organic glass exhibited intense red fluorescence under UV light and possessed the characteristics of broad absorption, narrow emission, and long fluorescence lifetime. The design and synthesis process is straightforward and cost-effective, making this approach highly valuable for the development and advancement of novel rare earth hybrid luminescent materials.