王洪鹏， 刘安宁， 刘洪基， 王冬梅
（山东科技大学化学与生物工程学院， 山东青岛266000）
DOI:10.13732/j.issn.1008-5548.2022.06.007
收稿日期： 2022-04-27， 修回日期：2022-07-07，在线出版时间：2022-11-01。
基金项目：国家自然科学基金项目，编号：21971152。
第一作者简介：王洪鹏（1998—），男，硕士研究生，研究方向为稀土配合物与无机材料复合的合成与应用。E-mail： 11470414422@qq.com。
通信作者简介：王冬梅（1966—），女，教授，博士，硕士生导师，研究方向为稀土配合物的复合与应用。E-mail： skdwdm@163.com。
摘要：选用铕离子作为中心离子，α-噻吩甲酰三氟丙酮(TTA)作为第一配体，邻菲罗啉(phen)作为第二配体，二氧化硅(SiO2)作为携载体，利用化学沉淀法合成二元配合物Eu(TTA)3·H2O和三元配合物Eu(TTA)3·phen,利用Stober方法合成2种SiO2携载的复合物；采用傅里叶变换红外光谱仪、紫外吸收光谱仪、荧光分光光度计、热重分析仪、扫描电子显微镜对2种铕配合物及相应的SiO2复合物的结构、形貌、荧光性质进行表征分析；通过配合物与复合物的对比，研究SiO2携载对于配合物荧光性能与热稳定性的影响。结果表明：稀土配合物携载SiO2后其荧光强度提升到接近2倍，三元配合物的荧光强度优于二元配合物的；SiO2携载后的复合物热稳定性得以提升。
关键词：铕；稀土配合物；二氧化硅携载
Abstract：Europium ion was selected as the central ion, α-thenoyltrifluoroacetone(TTA) as the first ligand, phenanthroline(phen) as the second ligand and silica(SiO2) as the carrier, the binary complexes Eu(TTA)3·H2O and ternary complexes Eu(TTA)3·phen were synthesized by chemical precipitation method. Two SiO2 supported composites were synthesized by Stober method. The structure, morphology and fluorescence properties of two Eu complexes and corresponding SiO2 complexes were characterized and analyzed by Fourier transform infrared spectrometer, ultraviolet absorption spectrometer, fluorospectrophotometer, thermal gravimetric analyzer and scanning electron microscope. The effects of SiO2 loading on the fluorescence properties and thermal stability of the complexes were studied by comparing with and without SiO2 loading. The results show that the fluorescence intensity of rare earth complexes carried on SiO2 increase to nearly 2 times, and ternary complexes are better than binary complexes and the thermal stability of SiO2 loaded composites is improved.
Keywords：europium; rare earth complex; silicon dioxide coating
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