摘要
合成了三个以草酰胺为桥的新型三核配合物〔Ｃｕ＿２（ｏｘａｅ）＿２Ｌｎ（ＳＣＮ）＿３〕．由元素分析、红外光谱、电导、电子光谱、磁性测量以及ＥＳＲ潜等手段推定这些配合物具有草酰胺桥结构，测定了〔Ｃｕ＿２（ｏｘａｅ）＿２Ｇｄ（ＳＣＮ）＿３〕的变温磁化率，其数值用最小二乘法和从自旋哈密顿算符．导出的磁方程理论曲线拟合，求得交换积分Ｊ（Ｃｕ－Ｇｄ）和Ｊ＇（Ｃｕ－Ｃｕ）分别为２．３７／ｃｍ和－０．７１／ｃｍ，表明Ｃｕ（Ⅱ）和Ｇｄ（Ⅲ）离子间有弱的铁磁性超交换作用。
Three novel μ-oxamido trinuclear complexes,namely Cu_2Ln(oxae)_2(NCS)_3(Ln:Eu, Gd,Er),Where oxae is N,N'-bis(2-aminoethyl)oxamido dianion,have been synthesized.Based on IR, ESR,elemental analveses,electronic spectra, molar conductance and magnetic prop-erty measures, these complexesare proposed to have oxamidobridged structrue, The variabletem-perature magnetic susceptibilities of Cu_2Gd(oxae)(NCS)_3 were measured over 4-300 K and theobserved data were successfully simulated by equation based on spin Hammiltonian operator The excbange interals,J_(Gd-Cu) andJ’_(Cu-Cu)were found to be 2. 37 cm￣(-1) and-0.71 cm￣(-1) respectively,indicating that very weaklyferronagnetic spin-exchange interaction operates between Cu(Ⅱ)and Gd(Ⅲ)ions。
出处
《山东师范大学学报（自然科学版）》
CAS
1995年第2期168-172,共5页
Journal of Shandong Normal University(Natural Science)
关键词
三核配合物
草酰胺桥
配合物
合成
铜
Trinuclea complex
oxamido bridge
ferromagnetic spin-exchange interac-tion
variable-temperature magnetic susceptibility
