【摘要】 本文测定了系列稀土螯合物（TTA）₄ LnQH 的振动光谱,讨论了螯合物的结构,低波数谱带和 Ln-O 振动。更多还原

【Abstract】 The FT-IR and Raman spectra for （TTA）₄LnQH（Q=quinoline） series were measured and discussed as following. 1.Structure and spectra Due to the similar IR and Raman spectra observed for （TTA）₄LnQHseries there would be the structural analogy for the compounds,i.c.the central ion Ln³⁺ is coordinated with eight oxygen atoms which belong to four TTA groups respective- ly.IR spectra indicates that The hydrogen bond between the nitrogen of quinoline and the oxygen atom of TTA group is formed to make a stable molecular system. The facts that there is a successive change of Ln-O IR(306-320 cm^-1) and Raman(310—323 cm^-1) vibrational frequencies with the increase of lauthanide atomic number and the vibrational frequencies of TTA C=O groups coordinated come down to near 1605 cm^-1 from near 1657 cm^-1 prove the coordination of TTA with lanthanidc ions.The band near 3240 cm^-1 indicats the existancc of hydrogen bond. In addition the low frequency spectrs(500-100 cm^-1) is discussed in detail. 2.The abnormal spectra of Tb and TmThe vibrational frequencies of Tb—O,Tm—O in （TTA）₄LnQHseries show a deviation from the lanthanide “inclined W effects” namely,somewhat higher frequency for Tb—O,and lower one for Tm—O,The calculation with standard EHMO program suggested that as the f-electrons fluctuate between the 4f-orbitals and the frontier orbitals of TTA,the lanthanidc ions alternate between two oxida- tion states.As for the electrion configuration they trend toward: Tb³⁺Tb⁴⁺+e Tm³⁺+eTm²⁺ As is well know,the frequency of tetravalent cationic compounds should be higher than that for trivalent componnds related and the frequency of bivalent cationic compounds should be lower.Therefore the anomalous phenomena related Tb and Tm appears.更多还原