Science of Nano-Wire Metal Complexes with Strong Electron-Correlation

强电子关联纳米线金属配合物科学

• 批准号: 15GS0216
• 负责人: YAMASHITA Masahiro
• 金额: $ 253.84万
• 依托单位: Tohoku University (2004-2007)Tokyo Metropolitan University (2003)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Creative Scientific Research
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15GS0216/
• 关键词: Third-Order Optical Nonlinearity; Strong Electron Correlation; Electron-Phonon Interaction; Peierls Transition; Nano-Wire; Mott-Insulator; Fastener Effect; Ultra-Fast Optical Communication; 電荷密度波状態; モット絶縁体状態; 相転移; 光誘起相転移; 化学的圧力; ナノワイヤー金属錯体

Quasi-one-dimensional halogen-bridged Pd compounds take a Pd(II)-Pd(IV) mixed-valence state or charge-density-wave state or Peierls Insulator due to the electron-phonon interaction. In order to realize a Pd(III) Mott-Insulator we used the sulphonic acid counter anions with long alkyl chains. In the raw of the five alkyl chain, the Pd compound shows the phase transition from the Pd(II)-Pd(IV) Peierls Insulator into the Pd(III) Mott-Insulator about 200K with hysteresis, which is the inverse Peierls transition. This phenomena were evidenced by ESR, X-ray single-crystal analyses, single-crystal reflection spectra, electrical conductivities, etc. In the case of the ten and twelve alkyl chains, the Pd(III) Mott-insulators are the ground state even in mom temperature, which is the first example. These interesting phenomena are well explained by the fastener effect or chemical pressure of the long alkyl chains. In the Pd(III) Mott-Insulator at 15 K the photo-irradiation with the energy of the charge transfer band (0.5eV) produced the Pd(II)-Pd(IV) Peierls Insulator state, while the photo-irradiation with L5 eV produced the metallic state. Such photo-induced phase transitions occurred in femto-seconds, which are available for the ultra-fast optical communication.

由于电子 - 载体相互作用而导致的PD（II）-PD（IV）混合含量状态或电荷密度波状态或PEIERLS绝缘子，含卤素的卤素桥接PD化合物。为了实现PD（III）Mott-Mundulator，我们使用了具有长烷基链的磺酸反阴离子。在五个烷基链的原料中，PD化合物显示了从Pd（II）-PD（IV）Peierls绝缘子中的相变到PD（III）Mott-Mott-usulator，约为200K，磁滞，这是反向PEIERLS的过渡。 ESR，X射线单晶分析，单晶反射光谱，电导率等证明了这一现象。在十个和十二烷基链的情况下，PD（III）Mott-Mundulators甚至是基态均为基态。在妈妈温度下，这是第一个例子。这些有趣的现象通过长烷基链的紧固效应或化学压力很好地解释了。在15 K的PD（III）Mott-undulator中，带有电荷传递带（0.5EV）能量的光辐照产生了PD（II）-pd（iv）Peierls Peierls绝缘子状态，而带有L5的光辐照EV产生了金属状态。这种照片诱导的相变发生在FEMTO秒中，可用于超快速的光学通信。

项目成果

Single-Chain Magnet(Net_4)[Mn_2(5-MeOsalen)_2Fe(CN)_6] Made of Mn^<III>-Fe^<II>-Mn^<III> Trinuclear Single-Molecule Magnet with an ST=9/2 Spin Ground State

单链磁体(Net_4)[Mn_2(5-MeOsalen)_2Fe(CN)_6] Mn^<III>-Fe^<II>-Mn^<III>三核单分子磁体，ST=9/

• 发表时间: 2005
• 期刊: J.Am.Chem.Soc. 127
• 作者: T. Matsumoto;T. Taguchi;K. Mima;R. Kajitani,;M.Ferbinteanu et al.
• 通讯作者: M.Ferbinteanu et al.

[Mn_2^<III>(5-Rsaltmen)_2Ni^<II>(pao)_2L]^<2+> : An S_T=3 Building Block for a Single-Chain Magnet That Behaves as a Single-Molecule Magnet

[Mn_2^<III>(5-Rsaltmen)_2Ni^<II>(pao)_2L]^<2>：用于单链磁体的 S_T=3 构建块，其行为类似于单分子磁体

• 发表时间: 2005
• 期刊: Chem.Eur.J. 11
• 作者: H. Sakagami;T. Johzaki;H. Nagatomo;K. Mima;H.Miyasaka et al.
• 通讯作者: H.Miyasaka et al.

Visualization of Local Structures in Quasi-One-Dimentional Halogen-Bridge Complexes[Ni_<1-x>Pd_x(chxn)_2Br]Br_2bySTM

准一维卤桥配合物[Ni_<1-x>Pd_x(chxn)_2Br]Br_2bySTM的局部结构可视化

• 发表时间: 2004
• 期刊: Angew.Chem.Int.Ed. 43
• 作者: Tomonori Nomoto;Taka-aki Ishibashi;Hiromi Okamoto;Hiro-o Hamaguchi;S.Takaishi et al.
• 通讯作者: S.Takaishi et al.

H.Miyasaka et al.: "Heterometallic Hexanuclear Cluster with and S=8 Spin Ground state : Mn^<II>{Mn^<II>(hfac)_2}_3[Ni^<II>(pao)_3]_2 Chfac^-=Hexafluoroacethylacetonate, pao^-=Pyridine-2-aldoxaimate)"Inorg.Chem.. 42. 4501 (2003)

H.Miyasaka 等人：“具有 S=8 自旋基态的异金属六核团簇：Mn^<II>{Mn^<II>(hfac)_2}_3[Ni^<II>(pao)_3]_2 Chfac

H.Tanaka et al.: "LESR Studies of Long-Lived Photogenerated Spins in the MX-Chain Complexes, Pd(chxn)_2Br_3"Synth.Met.. 135-136. 317-318 (2003)

H.Tanaka 等人：“MX 链复合物中长寿命光生自旋的 LESR 研究，Pd(chxn)_2Br_3”Synth.Met.. 135-136。