title: Copper(II) 5-methoxyisophthalate coordination polymers incorporating dipyridyl co-ligands: syntheses, crystal structures, and magnetic properties.
abstract: Hydrothermal reactions of mixed ligands 5-methoxyisophthalate (CH(3)O-H(2)ip) and dipyridyl with Cu(OAc)(2).2H(2)O afford five new coordination polymers, including {[Cu(CH(3)O-ip)(bpa)].H(2)O}(n) (1), [Cu(2)(CH(3)O-ip)(2)(bpa)(0.5)(H(2)O)](n) (2), [Cu(2)(CH(3)O-ip)(2)(bpp)(H(2)O)](n) (3), {[Cu(3)(CH(3)O-ip)(3)(bpp)(2)(H(2)O)].3H(2)O}(n) (4) and [Cu(4)(CH(3)O-ip)(3)(bpe)(OH)(2)](n) (5) (bpp = 1,3-di(4-pyridyl)propane, bpa = 1,2-bi(4-pyridyl)ethane, and bpe = 1,2-di(4-pyridyl)ethylene). Compound 1 consists of CH(3)O-ip anion-bridged 1D Cu(II) chains that are linked by trans-bpa into a 2D layer. Compound 2 is a 2D (4,4) layer that is connected by CH(3)O-ip anions. The gauche bpa in 2 lies in the cavity and meets the coordination requirement of the paddle-wheel dimeric copper unit. Compound 3 is an extended 3D polythreading network consisting of 2D (4,4) motifs with dangling bpp lateral arms. Compound 4 exhibits a 3D (4,6)-connected self-penetrating (6(5).8)(6(14).8) network that is composed of binuclear and mononuclear metal nodes. Compound 5 exhibits a 3D network with the tetranuclear [Cu(4)(mu(3)-OH)(2)](6+) cluster acting as nodes, which is constructed by the interconnection of 2D helical layers via bpe pillars. The results of magnetic determination show that the syn-anti carboxylato bridges in our cases induce a weak antiferromagnetic interaction in 1, and the syn-syn carboxylato bridge in 3 and 4 mediates a strong antiferromagnetic interaction.
authors.affiliation: College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, 471022, P. R. China.
authors.forename: Lu-Fang
authors.initials: LF
authors.lastname: Ma
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.forename: Li-Ya
authors.initials: LY
authors.lastname: Wang
authors.forename: Cheng-Peng
authors.initials: CP
authors.lastname: Li
authors.forename: Miao
authors.initials: M
authors.lastname: Du
mesh_terms: D015082:2,2'-Dipyridyl / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008024:Ligands; D008280:Magnetics; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*
chemical_list: D008024:Ligands; D009942:Organometallic Compounds; D011108:Polymers; C548936:copper(II)5-methoxyisophthalate; D015082:2,2'-Dipyridyl; D003300:Copper