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

纳米空间（层间空间）中化学物质的相互作用和动力学

• 批准号: 06453060
• 负责人: KITTAKA Shigeharu
• 金额: $ 0.38万
• 依托单位: OKAYAMA UNIVERSITY OF SCIENCE
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06453060/
• 关键词: vanadium pentoxide hydrate; layr space; anisotropic electric conductivity; protonic conduction; diffusion of H_2O; ammonium methavanadate; interlayr V^<4+>; ESR; 層状物質; ナノスペース; 分子運動性; 層間反応性; 層間水; 光学的反応性

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.

五氧化二钒水合物是一种离子层状物质，具有蒙脱石的特性。本课题研究了H_2O分子和NH_3分子在插层过程中的稳态条件，以及它们在插层过程中的扩散、导电、化学反应、层间离子迁移等动力学过程。结果表明：（1）插层H_2O分子的偶极矩沿c轴方向取向，在ab平面内无方向性;而H_2O沿着b轴的交流电导率显著高于H_2O沿沿着b轴的交流电导率。(2)H_2O分子在层间的扩散活化能远小于液态和冰态H_2O的扩散活化能，这是由于在吸附初期形成了柱，使H_2O分子的扩散变得容易。(3)NH_4VO_3的（001）晶面与V_2O_5的（001）晶面重合。(4)材料的水化使V^<4+>的ESR谱由各向异性变为各向同性。这表明了层间钒离子的存在，这是对五氧化二钒水合物结构的一个新的命题。

项目成果

橘高茂治: "Dynamic Properties of Monolayer Water Molecules on the lonic Crystalline Surfaces" KENS REPORT-X 1993/1994. 71-71 (1995)

Shigeharu Tachibana：“离子晶体表面单层水分子的动态特性”KENS REPORT-X 1993/1994 (1995)。

橘高茂治: "Dynamic Properties of Monolayer Water Molecules on the Ionic Crystalline Surfaces" KENS REPORT-X 1993/1994. 71-71 (1995)

Shigeharu Takata：“离子晶体表面单层水分子的动态特性”KENS REPORT-X 1993/1994 (1995)。

S.Kittaka, M.Sumida, and Y.Kuroda: "Photochemical Formation of V^<4+> in a Layred Vanandium Pentoxide Hydrate" Mat.Res.Soc.Symp.Proc.346. 697-702 (1994)

S.Kittaka、M.Sumida 和 Y.Kuroda：“层状五氧化二钒水合物中 V^<4> 的光化学形成”Mat.Res.Soc.Symp.Proc.346。

S.Kittaka, H.Hamaguchi, T.Shinno, and T.Takenaka: "Interlayr Water Molecules in the Vanadium Pentoxide Hydrate 6.Rigididy of Layred Structure against Adsorption of Water" Langmuir. (in press).

S.Kittaka、H.Hamaguchi、T.Shinno 和 T.Takenaka：“五氧化二钒水合物中的层间水分子 6.层状结构对水吸附的刚性”Langmuir。

橘高茂治: "Eelectron Microscope Study of Revolving Crystal Growth of β-type Vanadium Oxide Hydrate under Hydrothermal Conditions" Materials Research Society,Symposium Proceeding. 346. 691-695 (1994)

Shigeharu Tachibana：“水热条件下 β 型氧化钒水合物旋转晶体生长的电子显微镜研究”材料研究学会，研讨会论文集 346. 691-695 (1994)。