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(SiO_(2))作为携载体,利用化学沉淀法合成二元配合物Eu(TTA)_(3)·H_(2)O和三元配合物Eu(TTA)_(3)·phen,利用Stöber方法合成2种SiO_(2)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SiO_(2)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SiO_(2)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SiO_(2)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;SiO_(2)携载后的复合物热稳定性得以提升。
Europium ion was selected as the central ion,α-thenoyltrifluoroacetone(TTA)as the first ligand,phenanthroline(phen)as the second ligand and silica(SiO_(2))as the carrier,the binary complexes Eu(TTA)_(3)·H_(2)O and ternary complexes Eu(TTA)_(3)·phen were synthesized by chemical precipitation method.Two SiO_(2)supported composites were synthesized by Stöber method.The structure,morphology and fluorescence properties of two Eu complexes and corresponding SiO_(2)complexes were characterized and analyzed by Fourier transform infrared spectrometer,ultraviolet absorption spectrometer,fluorospectrophotometer,thermal gravimetric analyzer and scanning electron microscope.The effects of SiO_(2)loading on the fluorescence properties and thermal stability of the complexes were studied by comparing with and without SiO_(2)loading.The results show that the fluorescence intensity of rare earth complexes carried on SiO_(2)increase to nearly 2 times,and ternary complexes are better than binary complexes and the thermal stability of SiO_(2)loaded composites is improved.
作者
王洪鹏
刘安宁
刘洪基
王冬梅
WANG Hongpeng;LIU Anning;LIU Hongji;WANG Dongmei(School of Chemistry and Bioengineering,Shandong University of Science and Technology,Qingdao 266000,China)
出处
《中国粉体技术》
CAS
CSCD
2022年第6期58-63,共6页
China Powder Science and Technology
基金
国家自然科学基金项目,编号:21971152。
关键词
铕
稀土配合物
二氧化硅携载
europium
rare earth complex
silicon dioxide coating
