Research on Multifunctional Properties Coupled with Photon and Spin for Transition-Metal Complexes

Transition metal complexes with D14 d17 d17 d1configuration have a possibility of spin transition between an low-spin state and a high spin state。特别地，在混合效力复合体的情况下，任何自旋国家都在自旋交叉区域撒谎，新的结合现象类型，自旋和电荷是预期的。从这个观点来看，我们已经合成了混合的价值复合体。（n-C型D23型D27型D2）型D24型D2 N][Fe型D1 II型D1 Fe型D1 III型D1（dto）型D23型D2]（dto = CイイD22イイD22イイD22イイD2）， and have investigated the magnetic properties by means of magnetic susceptibility， magnetization，ESR andイイD157エD1Fe Mossbauer spectroscopy。From the measurements of magnetic susceptibility and magnetization as a function of temperature， [（n-C ― D23 ― D2H ― D2）― D24 ― D2N][Fe ― D1II ― D1Fe ― D1III ― D1（dto）― D23 ― D2] was found to show the ferManagement magnetic transition at 6 K and to show the reversible charge transfer phase transition at about 120 K。Moreover， we have investigated the spin transition of [Fe（NHイD22イエD2trz）イD23イエD2 [RSOイD23イエD2] 22 HイD22イイD2O。In the case of [Fe（NH ― D22 ― D2 trz）― D23 ― D2]（C ― D2 n +1 ― D2 SO ― D23 ― D2）― D22 ― D22 ― D22 ― D22 ― D2 O（n=1-9）， the transition temperature becomes higher by约80 K，增加了烷基链的长度，然后它饱和于n > 5。even-odd effect was observed in the hysteresis width。In the case of three-dimensional mixed-valence system Cs D22 Au D22 X D26， we have discovered a photo-induced Au valence transition for Cs D22 Au D22 Au D2Br D26 under high pressure。

Transition metal complexes with dィイD14ィエD1-dィイD17ィエD1 configuration have a possibility of spin transition between an low-spin state and a high spin state. Particularly, in the case of mixed-valence complexes whose spin states lie in the spin-crossover region, new types of conjugated phenomena due to spin and charge are expected. From this viewpoint, we have synthesized the mixed valence complex, [(n-CィイD23ィエD2HィイD27ィエD2)ィイD24ィエD2N][FeィイD1IIィエD1FeィイD1IIIィエD1(dto)ィイD23ィエD2](dto = CィイD22ィエD2OィイD22ィエD2SィイD22ィエD2), and have investigated the magnetic properties by means of magnetic susceptibility, magnetization, ESR and ィイD157ィエD1Fe Mossbauer spectroscopy. From the measurements of magnetic susceptibility and magnetization as a function of temperature, [(n-CィイD23ィエD2HィイD27ィエD2)ィイD24ィエD2N][FeィイD1IIィエD1FeィイD1IIIィエD1(dto)ィイD23ィエD2] was found to show the ferromagnetic transition at 6 K and to show the reversible charge transfer phase transition at about 120 K. Moreover, we have investigated the spin transition of [Fe(NHィイD22ィエD2trz)ィイD23ィエD2](RSOィイD23ィエD2)22HィイD22ィエD2O. In the case of [Fe(NHィイD22ィエD2trz)ィイD23ィエD2](CィイD2nィエD2HィイD22n+1ィエD2SOィイD23ィエD2)ィイD22ィエD22HィイD22ィエD2O(n=1-9), the transition temperature becomes higher by about 80 K with increasing the length of alkyl chain of the counter anion, and then it saturated at n > 5. The even-odd effect was observed in the hysteresis width.In the case of three-dimensional mixed-valence system CsィイD22ィエD2AuィイD22ィエD2XィイD26ィエD2, we have discovered a photo-induced Au valence transition for CsィイD22ィエD2AuィイD22ィエD2BrィイD26ィエD2 under high pressure.