一种基于中性分子的层状磁体[Fe(C₂O₄)(CH₃OH)]ₙ，在约23 K的奈尔温度（TN）下表现出磁有序。

A neutral molecular-based layered magnet [Fe(C2O4)(CH3OH)]n exhibiting magnetic ordering at TN approximately 23 K.

作者信息

Zhang Bin, Zhang Yan, Zhang Jinbiao, Li Junchao, Zhu Daoben

机构信息

Organic Solid Laboratory, Beijing National Laboratory for Molecular Science, CMS & Institute of Chemistry, The Chinese Academy of Science, Beijing 100190, PR China.

出版信息

Dalton Trans. 2008 Oct 7(37):5037-40. doi: 10.1039/b805776a. Epub 2008 Aug 1.

DOI:10.1039/b805776a

PMID:18802617

Abstract

Solvothermal synthesis of FeCl(2).4H2O and H2C2O(4).2H2O in methanol at 120 degrees C yielded yellow plate-like crystals of [Fe(C2O4)(CH3OH)]n. Each iron atom is in a distorted octahedral environment, being bonded to four oxygen atoms from two bisbidentate oxalate anions, one O atom of a chelating oxalate anion and one O atom from a methanol molecule as an oxalate group bridging ligand in a five-coordination mode. The neutral layer of [Fe(C2O4)(CH3OH)]n with a [4,4] net along the ac plane. There is no interaction between layers. A long range magnetic ordering with spin canting at TN approximately 23 K was observed and confirmed by AC susceptibility measurements.

摘要

在120℃下于甲醇中对FeCl₂·4H₂O和H₂C₂O₄·2H₂O进行溶剂热合成，得到了[Fe(C₂O₄)(CH₃OH)]ₙ的黄色片状晶体。每个铁原子处于扭曲的八面体环境中，与来自两个双齿草酸根阴离子的四个氧原子、一个螯合草酸根阴离子的一个O原子以及一个来自甲醇分子的O原子键合，甲醇分子作为草酸根基桥联配体以五配位模式存在。[Fe(C₂O₄)(CH₃OH)]ₙ的中性层沿ac平面具有[4,4]网络结构。层间没有相互作用。通过交流磁化率测量观察并证实了在约23K的奈尔温度（TN）下存在具有自旋倾斜的长程磁有序。