The Design And Assembly Of Molecular-Based And Layered Lanthanide Silicate Hybrid Luminescent Materials

The study concentrates on the syntheses of organic-inorganic molecular-based hybrid material with the two components equipped with covalent bonds. The organic components,which can sensitize rare earth ions fluorescence were modified by coupling agents and then the organic monomers with double reactivity were obtained. The modified functional ligand further behaves as a bridge both coordinates to rare earth ion and occurs a in-situ sol-gel process with matrix precursor, resulting a novel molecular hybrid material. With two routes: the modification of carboxyl and hydroxyl, the PHA-Eu hybrid material and PEG-Ln polymeric/inorganic hybrid system were obtained, respectively. The experiment results shows that there exists a strong chemical bond between the inorganic phase and the organic phase, no evident interface in the final materials was found. The final materials exhibit excellent luminescent properties. Sol-gel technology is the one of the most versatile methods for the preparation of inorganic-organic hybrid materials for its low processing temperature and the preparation of hybrid system through this method exhibit innovation of this study.As we all know, layered like materials have good physical properties, and recently, there are more and more interests in this type of materials, for it could be used in many fields such as ions exchange, conduction, catalysis and so on. So, in our study, We used 3-methancryloxy propyl trimethoxysilane , 3-choropropyl trimethoxysilane , 3-aminopropyl trimethoxysilane and so on. Through hydrothermal and sol-gel methods, we got a series of Eu, Tb layered like hybrid materials with good luminescent properties. The experimental result shows that the resulting hybrids possess the homogeneous micromorphology without phase separation phenomena and the materials exhibit high performed luminescent.