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Construction of 2D- and 3D-Heterospin Networks Connected by Photoresponsive Magnetic Couplers and Their Magnetic Properties

光响应磁耦合器连接的2D和3D异旋网络的构建及其磁性能

基本信息

批准号：
09440242
负责人：
KOGA Noboru
金额：
$ 8.96万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

By employing the heterospin system constituting of organic 2p spin and metal 3d spin, we aimed at the photochemical formations of super-high spin networks. For the formation do 1D chain, two kinds of 1 : 1 complexes of bis (hexafluoroacetylacetonato)manganese(II) and copper(II) coordinated with diazodi(4-pyridyl)methane(1) were prepared and their molecular and crystal structures were revealed by x-ray analyses. The magnetic susceptibilities (XィイD2molィエD2) of their crystals before and after irradiation were measured on a SQUID susceptometer. The thermal behaviors observed in XィイD2molィエD2 T vs T plots after irradiation for 97 hr showed characteristic ferrimagnetic and ferromagnetic chains ; interaction between the metal(II) ion and the photo-generated carbene is antiferro- and ferromagnetic in manganese and copper complexes, receptively. Maximum values of XィイD2molィエD2T for manganese and copper complexes correspond to ca. 200 and 20 manganese- and copper-carbene units with S=3/2, respectively.These results proved that the heterospin system we employed was useful for the construction of super high spin chain. To extend and improve the dimensionality of spin network, we designed the branched diazo-pyridyl derivatives as new type of photoresponsive couplers. The investigation of the magnetic properties f their metal complexes under matrices conditions are in progress.

利用由有机2p自旋和金属3d自旋组成的异自旋体系，研究了超高自旋网络的光化学形成。为了形成1D链，制备了二（六氟乙酰丙酮）锰（II）和铜（II）与重氮（4-吡啶基）甲烷(1)配位的两种1:1配合物，并通过x射线分析揭示了它们的分子结构和晶体结构。在SQUID电纳计上测量了辐照前后晶体的磁化率（X γ γ γ γ γ γ γ γ γ γ）。热行为中观察到XィイD2molィエD2 T vs情节辐照后97小时显示特征亚铁磁性和铁磁链;在锰和铜配合物中，金属（II）离子与光生成的碳之间的相互作用具有反铁磁性和铁磁性。在S=3/2的条件下，锰和铜配合物的X γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ。这些结果证明了我们所采用的异自旋体系对于构建超高自旋链是有用的。为了扩展和提高自旋网络的维数，我们设计了支链重氮吡啶衍生物作为新型光响应耦合器。它们的金属配合物在基体条件下的磁性能研究正在进行中。