New kinds of organic–inorganic hybrid materials consisting of rare earth (Eu3+, Tb3+) complexes covalently bonded to a silica-based network have been obtained by a sol–gel approach. Three novel versatile molecular building blocks containing sulfoxide organic units have been synthesized by methylene modification reaction, which are used as the ligands of rare earth ions and also as siloxane network precursors. The obtained hybrids are characterized by chemical analysis and spectroscopic methods such as FTIR and UV; XRD and SEM. Photoluminescence measurements on the prepared hybrids were performed showing the intra-4fn emission in the visible (Eu3+, Tb3+) region and in all the cases being sensitized by the sulfoxide ligands. The emission quantum efficiency and the Judd–Ofelt intensity parameters of Eu3+ hybrid materials were also investigated in detail.
采用溶胶-凝胶方法获得了新型有机-无机杂化材料,由稀土(Eu3+, Tb3+)络合物与
硅基网络共价结合而成。通过亚甲基改性反应合成了三种新型多功能分子建筑块,含有亚磺酰基有机单元,作为稀土离子的
配体,同时也作为
硅氧烷网络的前体。所获得的杂化材料通过
化学分析及FTIR、UV等光谱方法进行表征,并采用XRD和
SEM。对制备的杂化材料进行了光致发光测量,显示出在可见光(Eu3+, Tb3+)区域的4fn内发射,且在所有情况下均被亚磺酰基
配体所敏化。同时,详细研究了Eu3+杂化材料的发射量子效率和Judd–Ofelt强度参数。