Interaction and Dynamics of Chemical Species in the Nanospace (Interlayr Space)

水合五氧化二钒是一种离子层状物质，与蒙脱土具有相同的特性。本课题研究了插入H_2O分子和NH_3的稳态条件，以及它们的扩散、电导率、化学反应、层间离子迁移率等动力学特性。结果表明：(1)插入的H_2O分子偶极矩取向于c轴，而偶极矩取向于ab平面。而H_2O沿b轴表示交流电导率。(2)层间H_2O分子扩散活化能远小于液态和冰态H_2O分子扩散活化能。这可以解释为在吸附初期形成的柱状结构，减缓了H_2O分子的扩散。(3)先前插入的氨分子与新插入的H_2O和大量的V_2O_5层片反应形成NH_4VO_3，其（001）平面在拓扑上与水合钒的（001）平面重合。(4)材料水化作用使具有各向异性的V^<4+>的ESR谱转变为各向同性谱。这表明层间钒离子的存在，是关于水合物五氧化二钒结构的新命题。

Vanadium pentoxide hydrate is an ionic layred substance and has characteristic properties as does the montmorillonite. In the present project statinary conditions of intercalated H_2O molecules and NH_3, and their dynamics like diffusion, electric conductivity, chemical reactions, interlayr ions's mobility were studied. Results are as follows,(1) The intercalated H_2O molecules are oriented their dipole moment to the c-axis and non- directionally in the ab-plane. However, AC electri cconductivity along b-axis is marked in H_2O along b-axis.(2) Activation energy of diffusion of H_2O molecules between the layrs is much smaller than those for liquid and ice H_2O.This is explained by the formaiton of pillars in the initial stage of adsorption, which eases the diffusion of H_2O molecules.(3) Ammonia molecules previously intercalated react with newly intercalated H_2O and substantial V_2O_5 layr sheets to form NH_4VO_3 topotactically coinciding its (001) plane with that of vanadium oxide hydrate.(4) ESR spectrum of V^<4+> with anisotropic character was changed into that of isotropic one by hydration of the material. This signifies the presence of interlayr vanadium ions, which is the new proposition about the structure of vnadium pentoxide hydrate.