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Two Homometallic Antiferromagnets Based on Oxalato-Bridged Honeycomb Assemblies: (A)(2)[M-2(II)(C2O4)(3)] (A = Ammonium Salt Derived from Diethylenetriamine; M-II = Fe2+, Co2+)
Duan, Zhiming1,2; Zhang, Yan3; Zhang, Bin1; Pratt, Francis L.4
2009-03-02
Source PublicationINORGANIC CHEMISTRY
ISSN0020-1669
Volume48Issue:5Pages:2140-2146
AbstractOxalato-bridged divalent homometallic compounds (A)(2)[M-2(II)(C2O4)(3)] (M-II = Fe2+ (1), Co2+ (2)) were obtained by a solvothermal method. They consist of honeycomb anions and cations, that is, the 5-oxo-1,4,7-triazabicyclo[4.3.0]non-6-en-7-yl ammonium ion (hereafter abbreviated as A(1)) in 1 and the 2-(2,3-dioxo-1-piperazinyl)eth-1-yl ammonium ion (hereafter abbreviated as A2) in 2, which were generated from in situ reactions of diethylenetriamine (DETA) with oxalic acid catalyzed by the metal ions and yielded two compounds with different cell parameters: a = 17.2224(4)angstrom, b = 9.3151(2)angstrom, c = 15.1518(4)angstrom, beta = 95.767(1)degrees, V = 2418.5(1)angstrom(3), and Z = 4, C2/c for 1 and a = 9.6924(2)angstrom, b = 15.8325(4)angstrom, c = 17.2995(4)angstrom, beta = 95.144(1)degrees, V = 2644.0(1)angstrom(3), Z = 4, and P2(1)/n for 2. A, points its carbonyl group to the pocket of the honeycomb network. A2 forms a helical chain around the anion layers through hydrogen bonds along the 21 axis, and the crystal remains achiral due to the existence of the inversion symmetry. The methanol molecules occupy the holes situated between A2 and the oxalate network in 2. The distance between two anion layers in 1 was shorter than in 2 due to the template effect of the ammonium salts. In the anion layers, the hexagonal rings are elongated along the a axis in 1 and 2. There are interactions as hydrogen bonds between the cation and anion and between cations. A broad maximum observed in the temperature-dependent susceptibility curve shows antiferromagnetic interactions between paramagnetic ions. The antiferromagnetic ordering at 28 K in 1 and 21 K in 2 was confirmed by ac suspceptibility and specific heat measurements. Hysteresis loops with a coercive field of 17 Oe in I and 2300 Oe in 2 were observed at 2 K.
DOI10.1021/ic8021003
Indexed BySCI
Language英语
WOS IDWOS:000263667700043
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/67494
Collection中国科学院化学研究所
Corresponding AuthorZhang, Bin
Affiliation1.Chinese Acad Sci, CMS & Inst Chem, Organ Solid Lab, BNLMS, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
3.Peking Univ, Dept Phys, Beijing 100871, Peoples R China
4.Rutherford Appleton Lab, ISIS, Didcot OX11 0QX, Oxon, England
Recommended Citation
GB/T 7714
Duan, Zhiming,Zhang, Yan,Zhang, Bin,et al. Two Homometallic Antiferromagnets Based on Oxalato-Bridged Honeycomb Assemblies: (A)(2)[M-2(II)(C2O4)(3)] (A = Ammonium Salt Derived from Diethylenetriamine; M-II = Fe2+, Co2+)[J]. INORGANIC CHEMISTRY,2009,48(5):2140-2146.
APA Duan, Zhiming,Zhang, Yan,Zhang, Bin,&Pratt, Francis L..(2009).Two Homometallic Antiferromagnets Based on Oxalato-Bridged Honeycomb Assemblies: (A)(2)[M-2(II)(C2O4)(3)] (A = Ammonium Salt Derived from Diethylenetriamine; M-II = Fe2+, Co2+).INORGANIC CHEMISTRY,48(5),2140-2146.
MLA Duan, Zhiming,et al."Two Homometallic Antiferromagnets Based on Oxalato-Bridged Honeycomb Assemblies: (A)(2)[M-2(II)(C2O4)(3)] (A = Ammonium Salt Derived from Diethylenetriamine; M-II = Fe2+, Co2+)".INORGANIC CHEMISTRY 48.5(2009):2140-2146.
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