Synthesis and Magnetic Properties of Dual-Ligand Divalent Copper Coordination Polymers with Rhomboid Layer, Archimedean Grid, and Self-Penetrated Network Topologies

Citations Over TimeTop 10% of 2009 papers

Abstract

Four divalent copper coordination polymers containing both 1,2-phenylenediacetate (1,2-phda) and dipyridyl-type coligands have been prepared and structurally characterized by single-crystal X-ray diffraction. {[Cu(1,2-phda)(dpa)]·H2O}n (1, dpa = 4,4′-dipyridylamine) possesses a simple (4,4) rhomboid polymeric grid structure but can be considered a (4,6)-connected binodal supramolecular lattice with (4462)(446108) fsc topology. Use of a longer dipyridyl ligand afforded [Cu2(1,2-phda)2(dpp)]n (2, dpp = 1,3-di(4-pyridyl)propane), which manifests a rare self-penetrated rob lattice (48668 topology) built from the linkage of copper dicarboxylate layers through crossed dpp tethers. [Cu(1,2-phda)(H2O)(4-bpmp)0.5]n (3, 4-bpmp = bis(4-pyridylmethyl)piperazine) forms a 5-connected Archimedean cem layer with 334453 topology. The topology of 3 can be alternately described as a 3,4-connected binodal layer with a V2O5-type network. Incorporation of nitrate counterions led to formation of {[Cu(1,2-phda)(H2O)(H4-bpmp)] (NO3)·4.5H2O}n (4), a layered coordination polymer with hydrogen-bonded water molecule/nitrate ion chain motifs situated in the interlamellar regions. Strong antiferromagnetic coupling (J = −278(3) cm−1 with g = 2.28(1)) was observed within the {Cu2(OCO)4} “paddlewheels” in 2, while weak ferromagnetic superexchange (J = 3.5(9) cm−1 with g = 2.12(4)) along the {Cu(OCO)}n was evident in 3.

Related Papers

• → The crystal structure of an unstable polymorph of β-d-allose(2004)9 cited
• → Supramolecular formation of large hydrogen-bonded rings in the structures of two amino acid derivatives(2002)2 cited
• → Crystallographic and Computational Analysis of the Supramolecular Structure of 2,5-Dimethylpyrazolo[1,5-a]pyrimidin-7(4H)-one(2009)
• → 1-(2-Amino-4,5-dimethylphenyl)ethanone(2018)
• → The Crystal and Molecular Structure of .GAMMA.-Guanidinobutyric Acid Monohydrate.(1995)