title: Three-dimensional mesomeric networks assembled from helix-linked sheets: syntheses, structures, and magnetisms.
abstract: Two new three-dimensional nickel coordination polymers, [Ni3(BTC)2(4,4'-bpy)2(H2O)5].1.5H2O (1) and [Ni(PDB)(4,4'-bpy)].0.5H2O (2)(4,4'-bpy = bipyridine, BTC = 1,2,4-benzenetricarboxylate, PDB = pyridine-3,4-dicarboxylate), have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR, TGA, and single crystal X-ray diffraction. Both compounds contain 2D scaffolding motifs, and most interestingly adjacent scaffolds are connected by infinite helical chains into unique three-dimensional mesomeric networks. Moreover, temperature-dependent magnetic susceptibilities for the two compounds were studied, and ferromagnetic interactions through syn-anti carboxylate bridges between Ni sites have been observed.
authors: Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.
authors: Chao
authors: C
authors: Qin
authors: Xin-Long
authors: XL
authors: Wang
authors: Yang-Guang
authors: YG
authors: Li
authors: En-Bo
authors: EB
authors: Wang
authors: Zhong-Min
authors: ZM
authors: Su
authors: Lin
authors: L
authors: Xu
authors: Rodolphe
authors: R
authors: Clérac
mesh_terms: D018360:Crystallography, X-Ray; D008280:Magnetics; D008958:Models, Molecular; D009532:Nickel / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D011725:Pyridines; D013696:Temperature
chemical_list: D009942:Organometallic Compounds; D011725:Pyridines; D009532:Nickel; C034306:4,4'-bipyridyl