同位素锂盐冠醚络合物的红外位移

INFRARED SHIFT OF COMPLEXES OF ISOTOPIC LITHIUM SALTS WITH CROWN ETHER

摘要: <正> 利用冠醚分离锂同位素的研究工作已有一些报道。在锂盐冠醚络合物化学交换体系中冠醚结构,特别是冠醚环的大小与锂离子的匹配效应将影响同位素的分离效果。文献4中指出,Li~+的晶体半径为6.0nm,而其配位半径为9.0nm,故与15-冠-5(冠醚环半径为8.5—

Abstract: The complexes of LiTFA(lithium trifluoro acetate), LiSCN, LiTNA(lithium picrate), LiClO4,LiBr and LiCl isotopie salts with benzo-15-crown-5 have been prepared and their infrared absorption spectra investigated.Three peaks in the far infrared region which show remarkable isotopie shiftare observed.