化学学报 ›› 2004, Vol. 62 ›› Issue (5): 489-492. 上一篇    下一篇

研究论文

高温自旋交叉配合物Fe(mtt)2(NCS)2·2.5H2O的合成和磁性研究

陶建清1, 余智2, 游效曾2   

  1. 1. 盐城师范学院化学系, 盐城, 224002;
    2. 南京大学配位化学国家重点实验室, 南京, 210093
  • 投稿日期:2003-08-16 修回日期:2003-10-25 发布日期:2014-02-18
  • 通讯作者: 陶建清,E-mail:Jianqingtao@163.com E-mail:Jianqingtao@163.com
  • 基金资助:
    国家自然科学基金(No.G2001004)和江苏省教育厅自然科学基金(No.02KJB150010)资助项目.

Synthesis and Magnetic Study on High Temperature Spin Crossover Complex [Fe(mtt)2(NCS)2]·2.5H2O

TAO Jian-Qing1, YU Zhi2, YOU Xiao-Zeng2   

  1. 1. Department of Chemistry, Yancheng Teacher's College, Yancheng 224002;
    2. Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093
  • Received:2003-08-16 Revised:2003-10-25 Published:2014-02-18

自旋交叉配合物的研究是分子磁化学中的一个重要领域,已引起人们的普遍关注.近期我们设计、制备了配体2-methyl-1,4,8,9-tetraaza-triphenylene (mtt),并以此配体合成了一个新的高温自旋交叉配合物[Fe(mtt)2(NCS)2]*2.5H2O.通过元素分析、核磁共振、红外光谱、电喷雾质谱和紫外光谱等方法对该配体和配合物进行了表征.变温磁化率研究发现该配合物的自旋转换温度为Tc↑=347 K, Tc↓=343 K,回滞宽度4 K,是体系[Fe(L)2(NCS)2]中自旋转换温度最高的.与同体系其它配合物比较,发现配体的修饰对自旋交叉临界温度以及回滞宽度都有显著影响.

关键词: 配体, 磁化率, 自旋交叉, 自旋转换, 分子材料

The study of the spin-crossover phenomenon is an important field of magnetochemistry, which has attracted much attention. A new ligand, 2-methyl-1,4,8,9-tetraaza-triphenylene (mtt) and its complex, [Fe(mtt)2(NCS)2]·2.5H2O, exhibiting high temperature spin crossover were prepared. Elemental analysis, 1H NMR, infrared spectrum, electrospray ionization mass spectrum and ultraviolet spectrum were used to study the structure of the ligand and the complex. The variable-temperature magnetic susceptibility study shows that the temperatures of spin transition are Tc↑=347 K and Tc↓=343 K, respectively, and the hysteresis loop is 4 K, which is the highest spin crossover temperature in the kind of [Fe(L)2(NCS)2] system. By comparing the complex with other similar structural complexes, it is revealed that the modification of ligand will influence greatly the critical temperature and hysteresis loop of spin crossover.

Key words: ligand, magnetic susceptibility, spin crossover, spin transition, molecular material