Three azido-bridged Mn(II) complexes based on open-chain diazine   Schiff-base ligands: Crystal structures and magnetic properties

doi:10.1021/cg800138x

CORC > 北京大学 > 化学与分子工程学院

	Three azido-bridged Mn(II) complexes based on open-chain diazine Schiff-base ligands: Crystal structures and magnetic properties
	Yue, Yan-Feng ; Gao, En-Qing ; Fang, Chen-Jie ; Zheng, Tao ; Liang, Jue ; Yan, Chun-Hua
刊名	crystal growth design
	2008
关键词	METAL-ORGANIC FRAMEWORKS FERROMAGNETIC-ANTIFERROMAGNETIC INTERACTIONS MANGANESE(II) COORDINATION POLYMERS MONTE-CARLO-SIMULATION LIGHT-EMITTING-DIODES SPIN-CROSSOVER WEAK FERROMAGNETISM SPONTANEOUS RESOLUTION COPPER(II) COMPLEXES DINUCLEAR COMPLEXES
DOI	10.1021/cg800138x
英文摘要	Three new Mn(II)-azido polymeric complexes [MnL1(N-3)(2)center dot CH3OH](n) (1) (L-1 = 1-(2-pyridyl)-l-amino-4-(6-bromo-2-pyridyl)-2,3-diaza-1,3-butadiene), [MnL2 (N-3)(2)](n) (2a) and [Mn-2(L-2)(2)(N-3)(4)](n) (2b) (L-2 = 1-(2-pyridyl)-l-amino-4-benzyl-2,3-diaza-1,3-butadiene) have been synthesized and crystallographically characterized, and their magnetic properties are studied. Complexes I and 2b show similar one-dimensional (ID) coordination polymeric structure, in which Mn(II) ions are alternately bridged by two end-to-end (EE) and two end-on (EO) azido ligands, resulting in zigzag Mn(II)-azido chains. Complex 2a has a ID structure, and the Mn(II) ions are connected by double EO azido ligands, forming a neutral ID uniform chain. Standing in their mother liquor for ca. 2 weeks or more, 2a is transformed to 2b completely. The structures of 2a and 2b are characterized, and the quite different magnetic properties based on this transformation of kinetic favored phase to thermodynamic favored phase are discussed. Magnetic analyses reveal that alternating ferro- and antiferromagnetic interactions are mediated through the alternating EO and EE azido bridges, and the J(F) and J(AF) parameters are 7.8(1) and - 10.8(1) for complex 1, respectively, 7.7(4) and - 1 1.2(1) cm(-1) for complex 2b, respectively. For 2a, on the contrary, magnetic analyses reveal that the ferromagnetic coupling interactions are mediated through the double EO azido bridges, and the J(F) is 1.4 cm(-1).; Chemistry, Multidisciplinary; Crystallography; Materials Science, Multidisciplinary; SCI(E); 23; ARTICLE; 9; 3295-3301; 8
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/290092]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Yue, Yan-Feng,Gao, En-Qing,Fang, Chen-Jie,et al. Three azido-bridged Mn(II) complexes based on open-chain diazine Schiff-base ligands: Crystal structures and magnetic properties[J]. crystal growth design,2008.
APA	Yue, Yan-Feng,Gao, En-Qing,Fang, Chen-Jie,Zheng, Tao,Liang, Jue,&Yan, Chun-Hua.(2008).Three azido-bridged Mn(II) complexes based on open-chain diazine Schiff-base ligands: Crystal structures and magnetic properties.crystal growth design.
MLA	Yue, Yan-Feng,et al."Three azido-bridged Mn(II) complexes based on open-chain diazine Schiff-base ligands: Crystal structures and magnetic properties".crystal growth design (2008).