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合成了一种叠氮锰一维链状化合物([MnⅡ(N3)2(pybox)]n,1),该化合物采用2,6-吡啶双噁唑啉(pybox)三齿配体和叠氮作为共配体。用单晶X射线衍射的方法对其晶体结构进行了表征,结果表明二价锰离子通过双EO叠氮桥和双EE桥交替桥连成链状结构,其中锰离子分别与4个叠氮根和1个pybox配体上的3个氮原子配位,为七配位模式。变温磁化率数据表明,交替的EO叠氮桥和EE叠氮桥分别传递铁磁和反铁磁耦合相互作用形成一维交替的海森堡链。通过S=5/2交替铁磁-反铁磁耦合一维体系的理论模型,我们获得其磁耦合常数为:J1=9.19 cm-1,J2=-19.89 cm-1。化合物1在低温表现出反铁磁有序。
A novel azido manganese chain compound ([MnⅡ (N3) 2 (pybox)] n, 1) was synthesized using 2,6-pyridinedisoxazoline (pybox) tridentate ligand and azide As a co-ligand. The crystal structure was characterized by single crystal X-ray diffraction. The results showed that the divalent manganese ions were alternately bridged into double chains by the double EO azide bridge and the double EE bridge. Among them, the manganese ions were connected with four azide Coordination with three nitrogen atoms on one pybox ligand for the seven-coordinate mode. The results show that the alternating EO azide bridge and the EE azide bridge respectively transmit the ferromagnetic and antiferromagnetic coupling interactions to form a one-dimensional alternating Heisenberg chain. Through the theoretical model of S = 5/2 alternating ferromagnetic-antiferromagnetic coupling one-dimensional system, we obtain the magnetic coupling constants: J1 = 9.19 cm-1, J2 = -19.89 cm-1. Compound 1 exhibits antiferromagnetic ordering at low temperatures.