摘要
合成了系列苯甲酸－镝－钆混合稀土配合物．由元素分析确定其组成为（Ｄｙ＿（１－ｘ）Ｇｄ＿ｘ）Ｌ＿３（Ｌ＝Ｃ＿６Ｈ＿５ＣＯＯ￣－），通过ＦＴ－ＩＲ光谱和荧光光谱研究了配合物中羧酸根离子红外吸收峰的特征和荧光发射光谱的特征．配合物的红外光谱表明，在三个羧酸根中，至少有一个羧酸根是通过螯合－桥式混合配位形式与稀土中心离子键合的．因此，Ｄｙ￣（３＋）离子在配合物中不是位于正八面体的中心，而是处于一个非对称中心的位置．配合物的荧光光谱表明，当ＤｙＬ＿３中部分Ｄｙ￣（３＋）离子被Ｇｄ￣（３＋）离子取代时，Ｄｙ￣（３＋）离子的特征荧光发射强度得到较大提高．
series of the mixed rare earth complexes of the benzoate in solid state have been synthe-sized and were characterized by elemental analysis,IR and fluorescent spectra. The results of ele-mental analysis confirmed to the formula(Dy_(1-x)Gd_x)L_3(L=C_6H_5COO￣-).The IR spectra showedthat at least one of three benzoates in complex had the form of chelation-bridging dentate,ie. oneof the carboxyl oxygens for benzoate ion was shared between two adjacent rare earth ions.There-for,Dy￣(3+) ion in complex does not lie a centre of an octahedron formed by 6 oxygen atoms of thethree benzoate ions,whereas occupies a site which is not the centre of symmetry. In the fluores-cent experiments it was found that the fluorescence emission for Dy￣(3+) ion in pure DyL_3 is veryweak,but the fluorescence intensity of Dy￣(3+) can be enhanced when a part of Dy￣(3+) in DyL_3 weresubstitued for Gd￣(3+) ions.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
1994年第3期295-299,共5页
Journal of Inner Mongolia University：Natural Science Edition
基金
国家自然科学基金
关键词
稀土苯甲酸盐
红外光谱
荧光光谱
rare earth benzoate Dy￣(3+) ion Gd￣(3+) ion infrared spectra fluorescent spectra
