论文部分内容阅读
合成和表征了一种新的Schiff碱配合物MnL(ClO4)·3H2 O(1) (其中L为n(水杨醛 )∶n(二乙撑三胺 ) =1∶1缩合而成的Schiff碱 )。 1与FeSO4·7H2 O和K3 [Fe(ox) 3 ]·3H2 O(ox =oxalate)进一步反应 ,生成了双金属层状配位聚合物 { [MnL][FeⅡFeⅢ(ox) 3 ]·1.5H2 O} ∞(2 )。IR和M¨ossbauer谱测定结果表明 ,2具有二维层状结构 ,其阴离子层由 [FeⅡFeⅢ(ox) 3 ]-单元构成。变温磁化率 (5K～ 10 0K)测试结果表明 ,2中的自旋载体之间存在反铁磁交换作用。 5K时的磁滞现象表明 2在低温时可能存在铁磁有序 ,这可能是亚铁磁或自旋倾斜造成的
A novel Schiff base complex MnL (ClO4) · 3H2O (1) (where L is n (salicylaldehyde): n (diethylenetriamine) = 1: 1 was synthesized and characterized as Schiff Base). 1 was further reacted with FeSO4 · 7H2O and K3 [Fe (ox) 3] · 3H2 O (ox = oxalate) to form bimetallic layered coordination polymer {[MnL] [FeⅡFeⅢ (ox) 3] · 1.5H2 O} ∞ (2). The results of IR and Mossbauer spectroscopy indicate that 2 has a two-dimensional layered structure and its anion layer consists of [FeⅡFeⅢ (ox) 3] -units. The experimental results of the temperature-dependent magnetic susceptibility (5K ~ 100K) show that antiferromagnetic exchange exists between the two spin carriers. Hysteresis at 5K indicates that there may be ferromagnetic ordering of 2 at low temperatures, which may be due to ferrimagnetic or spin-tilt