稀土冠醚类配合物的研究——ⅩⅩ.三价及二价稀土硫氰酸盐与辛二酰双(4′-苯并-15-冠-5)配合物的合成和性质  

Studies on Rare Earth Complexes with Crown Ethers ⅩⅩ. Synthesis and Characterization of the Complexes of Rare Earth Elements (Ⅲ, Ⅱ) with Octanedioyl-bis (B-15-C-5)

作　　者：张伯彦[1] 谭民裕[1] 甘新民[1] 唐宁[1] 黄枢[2] 田宝芝[2] 

机构地区：[1]兰州大学化学系,兰州730000 [2]四川大学化学系,成都610064

出　　处：《化学学报》1992年第6期571-577,共7页Acta Chimica Sinica

基　　金：国家自然科学基金

摘　　要：在乙腈和二氯甲烷混合溶液中合成了三价稀土元素(La,Nd,Eu,Dy,Er,Yb)硫氰酸盐与辛二酰双(4′-苯并-15-冠-5)的六个新配合物。并在氩气氛中,以四氢呋喃为溶剂,锂-萘为还原剂,制得了二价铕硫氰酸盐与辛二酰双(4′-苯并-15-冠-5)的固体配合物。通过元素分析、红外光谱、差热热重分析、荧光光谱、穆斯堡尔谱、电子自旋共振谱、还原性实验等研究了双冠醚与稀土离子的配位作用,并讨论了三价和二价稀土配合物在物理及化学性质上的差别。In the present work, the 2:1 (M:L) solid complex 2La(SCN)_3·OBB·2H_2O, the 1:1 solid complexes Ln(SCN)_3·OBB·nH_2O [Ln=Nd, Eu, Dy, Er, Yb; OBB=Octanedioylbig (4'-benzo-15-crown-5); n=1-5] have been synthesized. The divalent europium complex Eu(SCN)_2·OBB·THF·3H_2O has been also prepared under argon being isolated from water and oxygen by reducing of the Eu (Ⅲ) complex with the reagent Li/naphthalene in THF. The complexation of the rare earth ions with the his (orown ether) and the differences between di-and trivalent europium complexes were established on the basis of elemental analysis, infrared spectra, the thermogravimetrio and differentical thermal analysis, electron spin resonance spectra, M(?)ssbauer spectra. The luminescence properties of the complexes were also studied.

关 键 词：稀土配合物 冠醚 硫氰酸盐 合成 

分 类 号：O614.33[理学—无机化学]