Interlayer Water Molecules in the Vanadium Pentoxide Hydrate, V2O5·nH2O. 6. Rigidity of Crystal Structure against Water Adsorption and Anisotropy of Electrical Conductivity
Interlayer Water Molecules in the Vanadium Pentoxide Hydrate, V2O5·nH2O. 6. Rigidity of Crystal Structure against Water Adsorption and Anisotropy of Electrical Conductivity
复制标题
五氧化二钒水合物 V2O5·nH2O 中的层间水分子 6. 晶体结构对水吸附的刚性和电导率的各向异性。
作者：
S. Kittaka;H. Hamaguchi;T. Shinno;T. Takenaka
采用偏振红外光谱法研究了水分子对V2O5·nH2O导电性的影响，并与水分子的取向有关。据证实，层间H2O分子是各向同性的ab平面的层状结构，表明它们是随机吸附在层状结构之间。这与电导率的各向异性相反，电导率的各向异性与a和B方向之间的跳跃距离的差异有关。随着H2O含量的变化，样品骨架振动的红外多色性保持不变。然而，ESR谱的V4+，其中微量的是固有地存在于样品中，表明，自由旋转运动的V4+时，形成了双层的H2O。这个物质…
The effect of H2O molecules on the electrical conductivity of vanadium pentoxide hydrate, V2O5·nH2O, was investigated in connection with their orientation through polarized FT-IR spectroscopy. It was confirmed that interlayer H2O molecules are isotropic in the ab plane of the layered structure, indicating that they are adsorbed randomly between the layered structures. This is in contrast to the anisotropy of electrical conductivity, which is related to the difference in the hopping distances between the a and b directions.The structure of V2O5·nH2O in a humid condition was also studied by means of FT-IR, ESR, and XRD measurements, which should strongly affect the electric conductivity. The infrared polychroic property of the skeletal vibrations of the sample remained unchanged with varying H2O content. However, the ESR spectra of V4+, a trace amount of which is intrinsically present in the sample, indicated that a free rotational motion of V4+ occurs when a double layer of H2O was formed. This substantiat...