Development of High-Pressuire X-ray Structure Analysis Technique and Solid State Chemistry at High Pressure

高压X射线结构分析技术及高压固态化学研究进展

• 批准号: 10440180
• 负责人: KOBAYASHI Hayao
• 金额: $ 8.58万
• 依托单位: Okazaki National Research Institutes
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10440180/
• 关键词: Structural Phase Transition; Molecular Conductor; Organic Superconductor; Metal-Insulator Transition; High-Pressure Structure; X-Ray Structure Analysis; 分子性伝導体; 結晶構造; 有機伝導体

Pressure is one of the most important parameters in the studies of physical properties of solids. Usually the precise data on the structure and electrical resistivities of single crystals at high pressure have been obtained by using clamp-type high-pressure cell. But the maximum pressure attainable in the clamp-type cell is not so high (in the case of X-ray studies using Be-cylinder cells. the maximum pressure is about 10kbar). Although the diamond anvile. which is the most convenient high-pressure generator, permits us the experiments at higher pressure. it is very difficult to apply the diamond-anvile high-pressure technique to very fragile organic single crystals. The aim of the present research project was the development of high-pressure X-ray structure analysis on the organic crystals by using diamond anvile and imaging plate X-ray detector. The technique of high-pressure single crystal four-probe resistivity measurements has been also developed in order to contribute to advance the solid state science of soft molecular materials at high pressure. We have recently succeeded to obtain the high-pressure crystal structure of an organic conductor whose accuracy has never realized. Furthermore, we have found the superconducting transition of the sulfur-analog of the first organic superconductor for the first time by using the improved method of high-pressure single crystal resisitivity measurements.

压力是固体物理性质研究中最重要的参数之一。通常单晶在高压下的结构和电阻率的精确数据是通过使用钳式高压池获得的。但钳式电池可达到的最大压力并不是那么高（在使用 Be 圆柱电池进行 X 射线研究的情况下，最大压力约为 10kbar）。虽有金刚砧。这是最方便的高压发生器，允许我们在更高的压力下进行实验。将金刚石砧高压技术应用于非常脆弱的有机单晶是非常困难的。本研究项目的目的是利用金刚石砧座和成像板 X 射线探测器对有机晶体进行高压 X 射线结构分析。还开发了高压单晶四探针电阻率测量技术，以促进高压软分子材料的固态科学。我们最近成功获得了有机导体的高压晶体结构，其精度从未实现过。此外，我们通过使用改进的高压单晶电阻率测量方法，首次发现了第一个有机超导体的硫类似物的超导转变。

项目成果

L.Brossard,H.Kobayashi 他11名: "Interplay between Chains of S=5/2 Localised Spins and Two-Dimensional Sheets of Organic Donors in the Synthetically Built Magnetic Multilayer λ-(BETS)_2FeCl_4" Eur.Phys.J.B1. 439-452 (1998)

L.Brossard、H.Kobayashi 和其他 11 人：“合成磁性多层 λ-(BETS)_2FeCl_4 中 S=5/2 局域自旋链与有机供体二维片之间的相互作用”Eur.Phys.J。 B1。439-452（1998）

H.Tanaka,H.Kobayashi 他3名: "Chemical Control of Electrical Properties and Phase Diagram of a Series of λ-Type BETS Superconductors,λ-(BETS)_2GaBr_xCl_<4-x>" J.Am.Chem.Soc.121. 760-768 (1999)

H.Tanaka、H.Kobayashi 等 3 人：“一系列 λ 型 BETS 超导体的电性能和相图的化学控制，λ-(BETS)_2GaBr_xCl_<4-x>”J.Am.Chem.Soc。 121.760-768 (1999)

T.Adachi et, al.: "Superconducting Transition of (TMTTF)_2PF_6 above 50 kbar [TMTTF=tetramethyltetrathiafulvalene"Chem.Lett.. 2000. 406-407 (2000)

T.Adachi 等人：“50 kbar 以上的 (TMTTF)_2PF_6 的超导转变 [TMTTF=四甲基四硫富瓦烯”Chem.Lett.. 2000. 406-407 (2000)

E.Arai,H.Fujiwara,H.Kobayashi 他3名: "Novel Stable Metallic Salts Based on a Donor Molecule Containing Peri-ditellurium Bridges,TMTTeN" Inorg.Chem.37. 2850-2851 (1998)

E.Arai、H.Fujiwara、H.Kobayashi 和其他 3 人：“基于含有二碲桥的供体分子的新型稳定金属盐，TMTTeN”Inorg.Chem.37 (1998)。

B.Narymbetov et.al.: "Origin of ferromagnetic exchange interactions in a fullerene-organic compound"Nature. 407. 883-885 (2000)

B.Narymbetov 等人：“富勒烯有机化合物中铁磁交换相互作用的起源”《自然》。