Copper aromatic dicarboxylate complexes with a very long conformationally flexible dipyridyl ligand: Coordination polymers and a supramolecular nanotube
作者:Nathan H. Murray、Emily M. Low、Amy L. Pochodylo、Robert L. LaDuca
DOI:10.1016/j.ica.2014.12.026
日期:2015.3
Hydrothermal reaction of copper nitrate and aromatic dicarboxylate precursors with the conformationally flexible and very long-spanning dipyridylamide ligand propane-1,3-diylbis(piperidine-4,1-diyl) bis(pyridin-4-ylmethanone) (4-ppbp) has generated three coordination polymers and a threaded-loop supramolecular complex. [Cu(tere)(4-ppbp)(H2O)]center dot 1.5H(2)O}(n) (1, tere = terephthalate) and [Cu(iph)(4-ppbp)(H2O)]center dot 2H(2)O}(n) (2, iph = isophthalate) both display slab motifs built from interdigitated (4,4) grid layers. [Cu-2(phda)(phdaH)(2)(4-ppbp)(2)]center dot 6H(2)O}(n) (3, phda = 1,4-phenylenediacetate) possesses a 4-connected 6(5)8 cds network with self-penetration of 8-membered circuits. [Cu-2(phtH)(2)(4-ppbp)(2)(H2O)(4)](NO3)(2)center dot H2O}(n) (4, pht = phthalate) manifests ring-like dinuclear coordination complex cations with anionic phtH ligands projecting into supramolecular tubes with an inner diameter of approximately 12 angstrom. Dehydration and thermal degradation properties of these new materials are discussed. We also report the crystal structure of the recrystallized dipyridylamide, 4-ppbp center dot 2H(2)O. (C) 2015 Elsevier B.V. All rights reserved.