摘要
在甲醇体系中,用常规溶液法由自行设计合成的配体2-[2-(4-苯甲酸甲酯)乙烯基]-8-羟基喹啉(C19H15NO3,HL)和稀土硝酸盐(Ln(NO3)3·nH2O)反应合成了6个相应的配合物[Ln(NO3)(L)2](Ln=Nd,1;Sm,2;Eu,3;Gd,4;Tb,5;Dy,6);配体用红外光谱、核磁共振、单晶X射线衍射进行表征和结构测定;配合物用元素分析、红外光谱、摩尔电导、热重分析进行表征。室温下,测定了配体和配合物的荧光光谱及配合物的荧光寿命,结果表明:配体本身在575 nm处有较强的荧光发射,当形成配合物后,仍然表现为配体的发光而没有出现稀土中心离子的特征发光;与此同时,依中心离子的不同出现了不同程度的荧光增强或减弱现象,并伴随一定程度的红移或蓝移现象。
Six rare earth complexes[Ln(NO3)(L)2](Ln=Nd,1;Sm,2;Eu,3;Gd,4;Tb,5;Dy,6)were synthesized from(E)-2-[2-(4-benzoate)ethenyl]-8-hydroxy-quinoline(HL,C19H15NO3)and rare earth nitrate salts Ln(NO3)3·nH2O(Ln=Nd,Sm,Eu,Gd,Tb,Dy).The ligand was characterized by IR,1H NMR,elemental analysis and the structure was determined by single crystal X-ray diffraction.The complexes were characterized by elemental analysis,IR,molar conductance and TG.The fluorescence spectra of complexes and ligand were investigated at room temperature in solid state.The results showed that the ligand itself has strong fluorescence emission at 575 nm.When the complexes are formed,they still show the luminescence of the ligand itself without the characteristic luminescence of the rare earth center ions.At the same time,the degree of fluorescence enhancement or attenuation and a degree of red shift or blue shift are accompanied by according to the central ion.
作者
孙若愚
吕妍
张敏芝
赵国良
Sun Ruoyu;LüYan;Zhang Minzhi;Zhao Guoliang(College of Chemistry and Life Science,Zhejiang Normal University,Jinhua 321004,China;Xingzhi College,Zhejiang Normal Universi-ty,Jinhua 321004,China)
出处
《中国稀土学报》
CAS
CSCD
北大核心
2019年第6期689-696,I0002,共9页
Journal of the Chinese Society of Rare Earths
基金
浙江省自然科学基金项目(LY12B01003)资助
