冠醚铕镧异核配合物的合成表征及荧光性质  

Preparation and Properties of Complex of Europium Lanthanum with Crown Ether and p -phthalic Acid

作　　者：赵永亮[1] 赵凤英[2] 郝忠喜[1] 

机构地区：[1]内蒙古大学化学化工学院 [2]内蒙古农业大学基础部,内蒙古呼和浩特010019

出　　处：《光谱学与光谱分析》2004年第3期305-307,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金 (2 0 0 61 0 0 2 )资助项目

摘　　要：以 18冠 6为配体 ,分别与高氯酸铕和高氯酸镧在乙腈介质中反应 ,合成冠醚铕和冠醚镧配合物 ;两种冠醚配合物与交联配体———对苯二甲酸反应 ,形成了对苯二甲酸冠醚铕镧异核稀土超分子配合物。由元素分析数据推测 ,超分子配合物的组成式为EuLaL2 L′(ClO4) 4 ·6H2 　 [L =18 C 6 ,L′ =p C6H4(COO-) 2 ],测定了超分子配合物的红外光谱 ,紫外光谱 ,摩尔电导及荧光光谱。结果表明 ,冠醚和对苯二甲酸根与稀土离子配位 ,而高氯酸根离子处于配合物的外界 ,铕镧异核稀土超分子配合物的荧光强度是冠醚铕的 8倍多。Two complexes of crown ether europium(EuL) and crown ether lanthanum(LaL) were synthesized by europium perchlorate and lanthanum perchlorate with 18-crown-6(18-C-6) respectively. The heternuclear complexes of europium-lanthanum p-phthalic acid crown ether were prepared by the two complexes (EuL and LaL) with p-phthalic acid. The elemental analysis shows that its composition is EuLaL2 L'(ClO4)(4) . 6H(2)O(L = 18-C-6 and L' = p-C6H4 (COO)(2)). The IR spectra, UV-spectra and molar conductor indicate that both ligands(L and L') coordinate rare earth ions (Eu3+ and La3+), but perchlorate group is free. The fluorescence spectra show that the fluorescence intensities of the complex of heternuclear (EuLaL2 L'(ClO4)(4).6H(2)O) are more than eight times that of the crown ether europium complex. It was shown that the linked ligand (P-phthalic acid) can transfer the absorbed energy of Lanthanum-crown ether to europium-crown ether with high efficiency.

关 键 词：冠醚铕配合物 冠醚镧配合物 合成 荧光光谱 超分子配合物 对苯二甲酸 稀土冠醚配合物 

分 类 号：O614.33[理学—无机化学] O641.4[理学—化学]