Solid State Properties of Metal-Assembled Complexes

金属组装配合物的固态特性

• 批准号: 10149103
• 负责人: KATO Reizo
• 金额: $ 53.57万
• 依托单位: RIKEN (1999-2002)The University of Tokyo (1998)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas (A)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10149103/
• 关键词: Photo-induced phase transition; Super conductivity; Magnetic properties; Charge transfer phase transition; Metal complexes; Transport properties; Nonlinear optics; Spin-crossover complexes; 光誘起相転移; 強磁性; 電荷移動相転移; 光物性; 強磁性体; 電荷移動; 光学特性; スピンクロ

We have studied solid state properties of metal-assembled complexes and have obtained the following results;1) Two new Pd(dmit)_2-based molecular superconductors have been found. Electronic states of these systems under pressure have been investigated with X-ray diffraction method and band calculation.2) Two examples of superconductivity induced by uniaxial strain have been found in molecular conductors, (DIETS)_2[Au(CN)_4] and ヲツ'-Me_4As[Pd(dmit)_2]_2, where metal complexes play an important role.3) The first metallic crystals of Ni(tmdt)_2 composed of single component molecules have been synthesized and characterized.4) The first examples of metallic systems interacting with ferromagnetic spins, (EDO-TTF)_2M(mnt)_2 (M=Ni, Pt), have been found. For (DMET)_2FeBr_4, a direct evidence of the ヲミ-d interaction particularly enhanced around the M-I transition has been obtained by the magnetoresistance measurements.5) The newly synthesized mixed-valence complex [(n-Pr)_4N][Fe^<II>Fe^<III>(dto)_3] has been revealed that the system shows the ferromagnetic transition at 6.5 K and the reversible charge transfer phase transition at about 120 K.6) We have prepared several [Fe(4-R=z)_3] complex films by using ion-exchange films such as Nafion film as counter anion, and have revealed that these films show the spin-crossover phenomenon near the room temperature.7) The dynamical study on the photo-effect under magnetic field in organic Fe(II) complex which shows the spin-crossover transition has revealed that the cooperative interaction plays an important role in the dynamic process of the photoconversion.8) Gigantic optical nonlinearity has been found in the one-dimensional (1D) Mott insulators, halogen-bridged Ni complexes, with electro-reflectance measurements, which strongly indicates a high potential for new optoelectronic materials of the 1D Mott-insulators.

我们研究了金属组装配合物的固态性质，并得到了以下结果：1）通过X射线衍射研究了这些体系在压力下的两种新型Pd(dmit)_2基分子超导体的电子态。 2) 在分子导体中发现了两个由单轴应变引起超导的例子，(DIETS)_2[Au(CN)_4]和Wotsu'-Me_4As[Pd(dmit)_2]_2，其中金属配合物发挥着重要作用。3) 第一个由单组分分子组成的 Ni(tmdt)_2 金属晶体已经合成并表征。4) 第一个例子已发现与铁磁自旋相互作用的金属系统 (EDO-TTF)_2M(mnt)_2 (M=Ni, Pt)。 (DMET)_2FeBr_4，通过磁阻测量获得了 Womi-d 相互作用在 M-I 转变周围特别增强的直接证据。5) 新合成的混合价配合物 [(n-Pr)_4N][Fe^<II >Fe^<III>(dto)_3]表明该体系在 6.5 K 时表现出铁磁转变，在约 5.5 K 时表现出可逆电荷转移相变120 K.6) 我们利用Nafion膜等离子交换膜作为抗衡阴离子制备了几种[Fe(4-R=z)_3]络合物薄膜，并揭示了这些薄膜在接近7)有机Fe(II)配合物在磁场下显示自旋交叉跃迁的光效应的动力学研究表明，协同相互作用在光转换的动态过程中起着重要作用。8)巨型光学通过电反射测量，在一维 (1D) 莫特绝缘体、卤素桥镍配合物中发现了强烈的非线性，这表明一维莫特绝缘体的新型光电材料具有很高的潜力。