Construction of Super-Structured Spin-Polarized Donor having Spin-rectifying Property

具有自旋校正特性的超结构自旋偏振施主的构建

• 批准号: 13304056
• 负责人: SUGAWARA Tadashi
• 金额: $ 28.2万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13304056/
• 关键词: Spin-Polarized Donor; Organic Ferromagnetic Metal; Organic Field Effect Transistor; Magneto-Resistance; Nano Particle; Molecular Wire; Molecular Wire Network; Molecular Magnetism; スピン整流; 磁性; 導電性; 超分子; 分子素子; 磁性金属; 多重項; 量子効果

The ultimate goal of this project is to construct super-structured "spin-polarized donors" that operate as molecule-based spin-rectifying devices. The following findings along this line have been achieved during the project period.1.In order to improve the conductivity of its ionradical salt of benzo-annulated OF based spin-polarized donors, sulfur atoms of the donor moiety were replaced with selenium atoms. The ionradical salts and the charge-transfer complexes of these spin-polarized donors were also prepared. Among them, an ion-radical salt of a selenium-introduced spin-polarized donor (ESBN) turned out to behave as the low band-gap (Ea = 40 meV) semiconductor, which exhibited the possibility to show the metallic conductivity under a high pressure. Such ion-radical salts are expected to manifest spin-alignment through the spin-polarized conduction electrons on the basis of the double exchange mechanism.2.A novel TTF based donor, OdTBN, having long alkyl chains was prepared to increa … More se the feasibility of fabrication. A thin film composed of OdTBN was formed on a silicon wafer and it was found that the sample acted as a field-effect transistor (FET).3.The preparative method of Roll nano-particles chemisorbed by organic π-radical has been established. The nano-particles, with an average diameter of 4nm, were chemisorbed by ca. 100 molecules of a thiol-derivatized spin-polarized donor, which was generated by the reduction cleavage of the corresponding disulfide precursor. The extreme broadening of ESR line-shape suggests the presence of the exchange interaction between localized spins of chemisorbed radicals and conduction electrons in the gold nano-particle. Moreover, it was to be noted that the evaluation technique of the precise size and its distribution of gold nano-particles by means of an X-ray small-angle-scattering method was established in collaboration with Rigaku-Denki Corporation.4.Various molecular wires bearing thiol groups at both ends were synthesized and it was found that they constructed network-like structures with gold nano-particles on interdigitated gold electrodes. The conducting property of the networked gold nano-particles strongly depended on the size of the nano-particles and the structure and the length of molecular wires. The conductivity of the networked structures was measured under the application of an external magnetic field and it was found that some of the samples exhibited a magneto-resistance effect. Less

该项目的最终目标是构建超结构的“自旋极化供体”，作为基于分子的自旋整流装置运行。本课题沿着这条路线取得了以下研究成果：1.为了提高苯并环化OF基自旋极化给体的离子自由基盐的电导率，用硒原子取代了给体部分的硫原子。还制备了这些自旋极化供体的离子自由基盐和电荷转移络合物。其中，硒引入的自旋极化供体（ESBN）的离子自由基盐被证明表现为低带隙（Ea = 40 meV）半导体，其表现出在高压下显示金属导电性的可能性。这种离子自由基盐在双交换机制的基础上通过自旋极化传导电子表现出自旋取向。2.制备了一种新型的TTF基长链给体OdTBN，以提高其在电子自旋取向方面的性能 ...更多信息 评估制造的可行性。在硅片上制备了由OdTBN组成的薄膜，发现该薄膜具有场效应晶体管（FET）的功能。3.建立了有机π自由基化学吸附Roll纳米粒子的制备方法。纳米颗粒平均直径为4 nm，被约10 μ m的化学吸附。100分子的硫醇衍生的自旋极化供体，其通过相应的二硫化物前体的还原裂解产生。电子自旋共振谱线的极大展宽表明，金纳米粒子中化学吸附自由基的局域自旋与导电电子之间存在交换作用。此外，还与Rigaku-Denki公司合作建立了通过X射线小角散射法对金纳米粒子的精确尺寸及其分布进行评估的技术。4.合成了两端带有巯基的各种分子线，发现它们在交叉指型金电极上与金纳米粒子构成了网状结构。网络化金纳米粒子的导电性能与纳米粒子的尺寸、分子线的结构和长度密切相关。在外加磁场的作用下测量了网络结构的电导率，发现部分样品表现出磁阻效应。少

项目成果

菅原 正, 松下未知雄: "超分子化学は何を目指すか"化学と教育. 50巻2号. 94-97 (2002)

菅原正、松下道雄：“超分子化学的目标是什么？”，第 50 卷，第 2. 94-97 期（2002 年）。

谷口伸一, 菅原正, ほか3名: "Noncatalytic, solvent-free thermal formation of cyclic trimers using 1,6-bis (acyloxylmethyl)haxa-2,4-diene derivatives"Tetrahedron Letters. 45. 2671-2675 (2004)

Shinichi Taniguchi、Tadashi Sukawara 和其他 3 人：“使用 1,6-双（酰氧基甲基）haxa-2,4-二烯衍生物非催化、无溶剂热形成环状三聚体”Tetrahedron Letters 45. 2671-2675 (2004)。

谷口伸一, 松下未知雄, 菅原正: "π型分子ワイヤーで連結した金ナノ粒子ネットワークの構造と電子輸送"ナノ学会会報. 2. 55-62 (2004)

Shinichi Taniguchi、Michio Matsushita、Tadashi Sukawara：“由 π 型分子线连接的金纳米颗粒网络的结构和电子传输”日本纳米学会公告 2. 55-62 (2004)。

Matsushita, Michio, Sugawara, Tadashi et al.: "Formation of self-assembled monolayer of phenylthiol carrying nitronyl nitroxide on gold surface."Chemistry Letters. 2002. 596-597 (2002)

Matsushita、Michio、Sugara、Tadashi 等人：“在金表面形成携带硝基氮氧化物的苯硫醇自组装单层。”化学快报。

Nakazaki, Jotaro, Sugawama, Tadashi et al.: "Design of spin-polarized molecular wire as a prototypal unimolecufar quantum spin device."Internet Electronic Journal of Molecular Design. 2. 112-127 (2003)

Nakazaki、Jotaro、Sukawama、Tadashi 等人：“作为原型单分子量子自旋器件的自旋极化分子线的设计。”分子设计的互联网电子杂志。