高等学校化学学报

高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (9): 919.

• 研究论文 •    下一篇

[(NH3)5CoImCu(dien)ImCo(NH3)5](ClO4)6·4H2O配合物单晶的ESR研究

陈东, 韩世莹, 眭云霞, 唐雯霞, 戴安邦   

  1. 南京大学配位化学研究所材料分析中心
  • 收稿日期:1988-10-11 出版日期:1990-09-24 发布日期:1990-09-24
  • 通讯作者: 唐雯霞, 210008
  • 基金资助:

    国家自然科学基金

Single Crystal ESR Study of Hctcrotrinuclcar Complex [(NH3)5CoImCu(dicn)ImCo(NH3)5](ClO4)6·4H2O

Chen Dong, Han Shiying, Sui Yunxia, Tang Wenxia, Dai Anbang   

  1. Coordination Chemistry Institute, Center of Material Aualyis, Nanjing University, Nanjing
  • Received:1988-10-11 Online:1990-09-24 Published:1990-09-24

PDF (PC)

摘要： 研究了咪唑桥联异三核配合物[(NH3)5CoImCu(dien)ImCo(NH3)5](ClO4)6·4H2O与同构配合物[(NH3)5CoImZn(dien)ImCo(NH3)5](ClO4)6·4H2O混合单晶在低温(100K)下的ESR。应用适于求非同轴g张量和A张量的最小二乘法拟合技术,解出标题配合物的g张量和A张量主值分别为:g1=2.246,g2=2.093,g3=2.048,A1=1.63×10-2cm-1,A2=0.38×10-2cm-1,A3=0.17×10-2cm-1及g1=2.245,g2=2.090,g3=2.051,A1=1.64×10-2cm-1,A2=0.37×10-2cm-1,A3=0.17×10-2cm-1。配合物Cu2+的4s、3d轨道上的电子自旋密度分别为0.018和0.557.Cu2+与配体间的键有较强的共价性。

关键词: 单晶ESR, 咪唑桥联异三核配合物, 铜, 钴

Abstract: Asingle crystal ESRstudy of heterotrinuclear complex [(NH3)5CoImCu (dien) ImCo (NH3)5] (ClO4)6·4H2O which is diluted with diamagnetic complex [(NH3)5CoImZn (dien)ImCo (NH3)5](ClO4)6·4H2O has been carried out at 100K. Two sets of ESR spectra were observed for the magnetic field orientations in the ZX and ZY planes. The spin-hamiltonian parameters are rigourously calculated by using the least-square-fitting method, specially adapted to non-coincident g and A tensor systems. Two sets of principal values and the directions of g and A tensors, which are caused due to the disorder of dien group, are given. The electron spin densities in the 4s and 3d orbitals of Cu( Ⅱ ) being 0. 018 and 0. 557 imply that the bonding between Cu( Ⅱ ) and ligands is not purely but mainly covalent.

Key words: Single crystal ESR, Imidazole bridged heterotrinuclear Complex, Copper, Cobalt

TrendMD: