A Series of Bimetallic Ammonium AlNa Formates

doi:10.1002/chem.201701099

CORC > 北京大学 > 化学与分子工程学院

	A Series of Bimetallic Ammonium AlNa Formates
	Yu, Yao ; Shang, Ran ; Chen, Sa ; Wang, Bing-Wu ; Wang, Zhe-Ming ; Gao, Song
刊名	CHEMISTRY-A EUROPEAN JOURNAL
	2017
关键词	AlNa bimetallic ammonium metal formate dielectric properties phase transition structure METAL-ORGANIC FRAMEWORKS NEGATIVE THERMAL-EXPANSION PROMINENT DIELECTRIC ANOMALIES STRUCTURAL PHASE-TRANSITIONS PEROVSKITE-LIKE MAGNETIC-PROPERTIES INORGANIC PEROVSKITES MECHANICAL-PROPERTIES COPPER-FORMATE ZN
DOI	10.1002/chem.201701099
英文摘要	A series of AlNa bimetallic ammonium metal formate frameworks (AlNa AMFFs) have been prepared by employing various ammoniums from NH4+ to large linear poly-ammoniums. The series consists of six perovskites of (4(12).6(3)) topology for mono-ammoniums, two chiral (4(9).6(6)) frameworks incorporating polyethylene ammoniums, two niccolites with (4(12).6(3))(4(9).6(6)) topology containing diammoniums, and two layered compounds made of 2D (4,4) AlNa formate sheets intercalated by small diammoniums. The first ten compounds present the structural hierarchy of (4(12).6(3)) m(4(9).6(6)) n framework topologies for (m, n)=(1, 0), (0, 1), and (1, 1), respectively, in parallel to the homometallic AMFFs for divalent metals. The symmetry lowering, asym-metric formate bridges, and different hydrogen-bonding strengths appeared in the bimetallic structures owing to the different charge and size of Al3+ and Na+ seemingly inhibits the occurrence of phase transitions for more than half the AlNa AMFFs within the series, and the bimetallic members undergoing phase transitions show different transition behaviors and dielectric properties compared with the homometallic analogs. Anisotropic/negative/zero thermal expansions of the materials could be rationally attributed to the librational motion, or flip movement between different sites, of the ammonium cations, and the coupled change of AlNa formate frameworks. The thermal and IR spectroscopic properties have also been investigated.; NSFC [21671008, 91422302, 21321001, 21290170, 21290171]; National Basic Research Program of China [2013CB933401]; SCI(E); ARTICLE; 41; 9857-9871; 23
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/472047]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Yu, Yao,Shang, Ran,Chen, Sa,et al. A Series of Bimetallic Ammonium AlNa Formates[J]. CHEMISTRY-A EUROPEAN JOURNAL,2017.
APA	Yu, Yao,Shang, Ran,Chen, Sa,Wang, Bing-Wu,Wang, Zhe-Ming,&Gao, Song.(2017).A Series of Bimetallic Ammonium AlNa Formates.CHEMISTRY-A EUROPEAN JOURNAL.
MLA	Yu, Yao,et al."A Series of Bimetallic Ammonium AlNa Formates".CHEMISTRY-A EUROPEAN JOURNAL (2017).