A 36-Fold Multiple Unit Cell and Switchable Anisotropic Dielectric   Responses in an Ammonium Magnesium Formate Framework

doi:10.1002/anie.201411005

CORC > 北京大学 > 化学与分子工程学院

	A 36-Fold Multiple Unit Cell and Switchable Anisotropic Dielectric Responses in an Ammonium Magnesium Formate Framework
	Shang, Ran ; Wang, Zhe-Ming ; Gao, Song
刊名	angewandte chemie international edition
	2015
关键词	ammonium metal formate dielectricity metal-organic frameworks multiple unit cell phase transition METAL-ORGANIC FRAMEWORKS X-RAY-DIFFRACTION BOND REARRANGEMENT PHASE-TRANSITIONS THERMAL-EXPANSION RATIONAL DESIGN PEROVSKITE PRESSURE DISORDER CRYSTAL
DOI	10.1002/anie.201411005
英文摘要	An ammonium Mg formate framework, prepared by using di-protonated 1,3-propanediamine (pnH(2)(2+)), has a rare three-dimensional binodal (4(12)6(3))(4(9)6(6))(3) Mg-formate framework with elongated cavities accommodating pnH(2)(2+)H(2)OpnH(2)(2+) assemblies. It displays a para-electric to antiferroelectric phase transition at 275K, with a 36-fold multiple unit cell from the high-temperature cell of 1703 angstrom(3) to the low-temperature one of 60980 angstrom(3). The change results from the disorder-order transition of the pnH(2)(2+) cations and H2O molecules. The motions of these components freeze in a stepwise fashion on going from the high-temperature disorder state to the low-temperature ordered state, triggering the switch from high to low dielectric constants, and the spatial limitation of such motions contributes the strong dielectric anisotropy.; Chemistry, Multidisciplinary; SCI(E); EI; PubMed; 2; ARTICLE; zmw@pku.edu.cn; gaosong@pku.edu.cn; 8; 2534-2537; 54
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/149654]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Shang, Ran,Wang, Zhe-Ming,Gao, Song. A 36-Fold Multiple Unit Cell and Switchable Anisotropic Dielectric Responses in an Ammonium Magnesium Formate Framework[J]. angewandte chemie international edition,2015.
APA	Shang, Ran,Wang, Zhe-Ming,&Gao, Song.(2015).A 36-Fold Multiple Unit Cell and Switchable Anisotropic Dielectric Responses in an Ammonium Magnesium Formate Framework.angewandte chemie international edition.
MLA	Shang, Ran,et al."A 36-Fold Multiple Unit Cell and Switchable Anisotropic Dielectric Responses in an Ammonium Magnesium Formate Framework".angewandte chemie international edition (2015).