Hydrogencyanamide-bridged one-dimensional polymers built on Mn-II-Schiff base fragments: Synthesis, structure, and magnetism

doi:10.1002/chem.200601174

CORC > 化学研究所 > 中国科学院化学研究所

	Hydrogencyanamide-bridged one-dimensional polymers built on Mn-II-Schiff base fragments: Synthesis, structure, and magnetism
	Yuan, Mei; Zhao, Fei; Zhang, Wen; Pan, Feng; Wang, Zhe-Ming; Gao, Song
刊名	CHEMISTRY-A EUROPEAN JOURNAL
	2007
卷号	13 期号:10 页码:2937-2952
关键词	Chain Structures Magnetic Properties Manganese n Ligands n o Ligands
ISSN号	0947-6539
DOI	10.1002/chem.200601174
英文摘要	The ability of NCNH- to construct transition metal coordination polymers and to transmit magnetic coupling was investigated. By introduction of various tetradentate Schiff base ligands (L) and different solvents (S), nine NCNH--bridged manganese(III) coordination complexes were obtained. Their structures can be divided into three types: I) NCNH-bridged chains built on mononuclear [Mn-III (L)] units, [Mn-III (L)(mu(1,3)-NCNH)(n) (L=5-Brsalen (1), 5-Clsalen (2)); II)NCNH-bridged chains built on dinuclear [Mn-III (2)(L)(2)] units, complexes 3-8, [Mn-III (2)(L)(2)(mu(1,3)-NCNH)]ClO4 center dot S (L=salen, 5-Fsalen, 5-Clsalen, 5-OCH(3)salen; S=CH3OH or C2H5OH); III) NCNH-bridged Mn-III dimers linked by hydrogen bonds into a 1D polymer, {[Mn-III (3-OCH(3)salen)-(H2O)](2)(mu(1,3)-NCNH)}ClO4 center dot 0.5H(2)O, salen=N,N'-bis(salicylidene)-1,2-diaminoethane). In these complexes, the N equivalent to C-NH- resonance structure dominates the bonding mode of the NCNH- ligand adopting the mu(1,3)-bridging mode. Magnetic characterization shows that the asymmetric NCNH- bridge transmits antiferromagnetic interaction between Mn-III ions and often favors the weak ferromagnetism caused by spin canting in these one-dimensional chains. However, these complexes exhibit different magnetic behaviors at low temperatures.
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000245389700020
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/61997]
专题	中国科学院化学研究所
通讯作者	Gao, Song
作者单位	Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Yuan, Mei,Zhao, Fei,Zhang, Wen,et al. Hydrogencyanamide-bridged one-dimensional polymers built on Mn-II-Schiff base fragments: Synthesis, structure, and magnetism[J]. CHEMISTRY-A EUROPEAN JOURNAL,2007,13(10):2937-2952.
APA	Yuan, Mei,Zhao, Fei,Zhang, Wen,Pan, Feng,Wang, Zhe-Ming,&Gao, Song.(2007).Hydrogencyanamide-bridged one-dimensional polymers built on Mn-II-Schiff base fragments: Synthesis, structure, and magnetism.CHEMISTRY-A EUROPEAN JOURNAL,13(10),2937-2952.
MLA	Yuan, Mei,et al."Hydrogencyanamide-bridged one-dimensional polymers built on Mn-II-Schiff base fragments: Synthesis, structure, and magnetism".CHEMISTRY-A EUROPEAN JOURNAL 13.10(2007):2937-2952.