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利用嵌入反应合成了有机 无机嵌入化合物Fe0 95PS3(MV) 0 1 1 (MV为 1,1′ 二甲基 4 ,4′ 联吡啶阳离子 ) ,对其结构和磁性进行了研究 .x射线衍射数据表明 ,此嵌入化合物的晶体结构仍为单斜晶系 ,空间群为C2 m ,晶胞参数a=0 879nm ,b=0 94 4nm ,c=1 0 70nm ,β =114 76°.相对于纯FePS3,层间距离增大 0 33nm .磁化率研究表明 ,从室温降到 4 2K过程中 ,此化合物经历了两级磁相变 .在居里温度TC =84K以下发生铁磁相变 ,奈尔温度TN =2 6K以下为反铁磁相变 .12— 30 0K变温M ssbauer谱研究证实 ,此化合物存在三个高自旋二价铁的位置 ,表明在嵌入反应过程中有电荷从客体分子转移到主体晶格中Fe—S的e g 反键轨道上 ,并有部分铁离子从晶格中脱出 ,从而在主体晶格中产生金属阳离子空位 .铁磁性是由于自旋倾斜所致 ,而极低温度下自旋倾斜消失 ,又表现为反铁磁性 .
The structure and magnetism of the organic-inorganic embedded compound Fe095PS3 (MV) 0 1 1 (MV is 1,1’-dimethyl4,4’-bipyridyl cation) were synthesized by the insertion reaction. The X-ray diffraction data , The crystal structure of the intercalated compound is still monoclinic and the space group is C2 m. The unit cell parameters a = 0 879nm, b = 0 94 4nm, c = 170 70nm, β = 114 76 °. Compared with pure FePS3 , The distance between the layers increases by 0 33nm.The magnetic susceptibility studies show that the compound undergoes two-stage magnetic phase transition from room temperature to 42K.The ferro-magnetic phase transition occurs at a Curie temperature TC = 84K, TN = 2 6K or less for the antiferromagnetic phase change .12-30K variable temperature M ssbauer spectroscopy study confirmed that this compound exists three high spin ferrous iron position, indicating that during the charge reaction from guest molecules to the host crystal Lattice Fe-S eg anti-bond orbit, and some of the iron ions from the lattice prolapse, resulting in the host lattice metal cation vacancies due to the ferromagnetic spin due to tilt, and very low temperature from Rotational tilt disappears, but also showed anti-ferromagnetic.