论文部分内容阅读
采用樟脑衍生物为配体,分别合成了氰基桥联Cu(Ⅱ)-Fe(Ⅲ)-Cu(Ⅱ)三核配合物[{Cu(D,L-La)2}2Fe(CN)6](ClO4)(1)和Mn“-Fe”双核配合物[Mn(D,L-Lb)(DMF)(Tp)Fe(CN)3·](H2O)6(2)。晶体结构分析表明,化合物1中Cu(Ⅱ)离子处于五配位的配位环境,分别和1个D-La,1个L-La及[Fe(CN)6]3-中的1个氰基配位,2个Cu(Ⅱ)离子通过[Fe(CN)6]3-桥联。通过分子间氢键作用,化合物1形成二维超分子网络结构。化合物2中,[(Tp)Fe(CN)3]-通过其中的1个氰基与[Mn(D,L-Lb)]+桥联,其中Mn(Ⅲ)离子为六配位,分别和四齿配体Lb的2个氧原子和2个氮原子、DMF的1个氧原子及[(Tp)Fe(CN)3]-中的氰基氮原子配位。磁性研究表明,在化合物1中,Cu(Ⅱ)离子与Fe(Ⅲ)离子之间表现出铁磁相互作用,用哈密顿函数■=-2J(1·2+2·3)对其χMT-T曲线进行拟合,得到1的朗日因子g为2.190,交换常数J为0.55cm-1。
Cyano-bridged Cu (Ⅱ) -Fe (Ⅲ) -Cu (Ⅱ) trinuclear complex [{Cu (D, L-La) 2} 2Fe (CN) 6 ] (ClO4) (1) and Mn “- Fe ” binuclear complex [Mn (D, L-Lb) (DMF) (Tp) Fe (CN) 3 ·] (H2O) 6 (2). The crystal structure analysis showed that Cu (Ⅱ) ion in compound 1 is in a five-coordinate coordination environment, and one cyanide in one D-La, one L-La and [Fe (CN) 6] 3- Coordination, two Cu (Ⅱ) ions through the [Fe (CN) 6] 3-bridge. Compound 1 forms a two-dimensional supramolecular network structure by intermolecular hydrogen bonding. In compound 2, [(Tp) Fe (CN) 3] - is bridged with [Mn (D, L-Lb)] + through one cyano group, The two oxygen atoms of the tetradentate ligand Lb coordinate with two nitrogen atoms, one oxygen atom of DMF and a cyano nitrogen atom of [(Tp) Fe (CN) 3] -. Magnetic studies show that in compound 1, the ferromagnetic interaction between Cu (Ⅱ) ions and Fe (Ⅲ) ions shows the ferromagnetic interaction with the Hamilton function ■ = -2J (1 · 2 + 2 · 3) Fitting χMT-T curves, we obtained 1 of the Rankine factor g of 2.190, exchange constant J of 0.55cm-1.