Erbium-formate frameworks templated by diammonium cations: syntheses,   structures, structural transition and magnetic properties

doi:10.1039/c1dt10241a

CORC > 北京大学 > 化学与分子工程学院

	Erbium-formate frameworks templated by diammonium cations: syntheses, structures, structural transition and magnetic properties
	Li, Mengyuan ; Liu, Bin ; Wang, Bingwu ; Wang, Zheming ; Gao, Song ; Kurmoo, Mohamedally
刊名	dalton transactions
	2011
关键词	METAL-ORGANIC FRAMEWORKS SINGLE-MOLECULAR LEVEL COORDINATION POLYMERS DIAMOND FRAMEWORK WEAK FERROMAGNETISM REVERSIBLE DEHYDRATION ISONICOTINATE LIGANDS GUEST INCLUSION GAS-ADSORPTION LANTHANIDE
DOI	10.1039/c1dt10241a
英文摘要	Two structurally different Er-formate frameworks, one NaCl-like [dmenH(2)][Er(HCOO)(4)](2) (1) and the other pillared-layer type [tmenH(2)][Er(HCOO)(4)](2) (2), were obtained when templated by the corresponding protonated N, N'-dimethylethylenediamine (dmenH(2)) and N, N, N',N'-tetramethylethylenediamine (tmenH(2)). The shape and size of the template cations dictate the different coordination geometries of erbium and consequently the framework topologies, though erbium adopts eight coordination in the two compounds. In the NaCl-like structure of 1, erbium is coordinated by eight anti-anti bridging formates in a square antiprism, while in the pillared-layer structure of 2, it is coordinated by six anti-anti bridging formates and one chelating formate in a pentagonal bipyramid. 2 exhibits a structural phase transition around -70 degrees C which is related to the disorder-order transition of the template cation. Both compounds behave as paramagnets between 2 and 300 K. However, they display field-dependent ac-susceptibilities with complicated field-induced magnetic relaxation processes, and the major slow ones probably results from spin-lattice relaxation.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000291034300027&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Inorganic & Nuclear; SCI(E); EI; PubMed; 36; ARTICLE; 22; 6038-6046; 40
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/149985]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Li, Mengyuan,Liu, Bin,Wang, Bingwu,et al. Erbium-formate frameworks templated by diammonium cations: syntheses, structures, structural transition and magnetic properties[J]. dalton transactions,2011.
APA	Li, Mengyuan,Liu, Bin,Wang, Bingwu,Wang, Zheming,Gao, Song,&Kurmoo, Mohamedally.(2011).Erbium-formate frameworks templated by diammonium cations: syntheses, structures, structural transition and magnetic properties.dalton transactions.
MLA	Li, Mengyuan,et al."Erbium-formate frameworks templated by diammonium cations: syntheses, structures, structural transition and magnetic properties".dalton transactions (2011).