A STUDY ON MICROSCOPIC STRUCTURE IN INCOMPLETELY HYDRATED MELTS

本文对EuCl_3、DyCl_3、LiBr和HCOOLi的不完全水合熔体以及高浓度LiBr和LiI的甲醇溶液进行了X射线反常散射、同位素替代中子衍射和各向同性拉曼光谱研究，以获得这些溶液中组分离子周围局域结构的详细信息。对含有过量Cl^-（Dy^&lt;3+&gt;：Cl^-=1：6）的DyCl_3浓水溶液进行结构分析，证明存在接触离子对Dy^&lt;3+&gt;Cl^-（r_<DyCl>=2.9A）。用中子衍射和拉曼散射方法测定了Li^+在高浓度LiBr、HCOOLi和LiBr、LiI甲醇溶液中的溶剂化结构。获得了这些溶液中接触离子对Li^+X^-（X=Br、I和HCOO）的结构细节。通过对高浓度HCOONa水溶液的X射线、中子和拉曼光谱分析，推测了Na^+和HCOO^-的水合结构。

X-ray anomalous scattering, neutron diffraction with isotopic substitution and Isotropic Raman spectroscopic studies have been carried out for incompletely hydrated EuCl_3, DyCl_3, LiBr and HCOOLi melts, and highly concentrated methanolic LiBr and Lil solutions, in order to obtain detailed information on the local structure around constituent ions in these solutions. Stuctural analysis of concentrated aqueous DyCl_3 solution with excess amount of Cl^- (Dy^<3+> : Cl^-=1 : 6) evidenced the existence of contact ion pair, Dy^<3+>Cl^- (r_<DyCl>=2.9A). The solvation structure of Li^+ in highly concentrated aqueous LiBr, HCOOLi and methanolic LiBr and Lil solutions was determined by neutron diffraction and Raman scattering methods. Details of the structure concerning the contact ion pair, Li^+X^- (X=Br, l and HCOO), in these solutions was obtained. The hydration structure of Na^+ and HCOO^- was deduced from the X-ray, neutron and Raman analyzes for highly concentrated aqueous HCOONa solution.