We have designed metal-organic supramolecules of copper(II) and nickel(II) using complexation of “click” ligands, and investigated their properties on capturing small molecular guests. A dimeric complex, [Cu2(5-MeO-m-xpt)2(H2O)2]4+, forms from tetradentate 5-methoxy-m-xylylenebis(pyridyltriazole), (5-MeO-m-xpt). This metallamacrocycle holds a benzene molecule as a guest inside its cavity in the solid state. Reduction of the complex using sodium ascorbate gives a Cu(I) dimer which, in turn, can reduce CO2 to oxalate giving an oxalate-bridged binuclear complex, [Cu2(5-MeO-m-xpt)2(μ-C2O4)]2+. With nickel (II), complexation of benzylpryidyltriazole, (bpt) gives [Ni(bpt)2(OH2)]2+ with the desired trans-planar arrangement of two pyridyltriazole chelating units around the metal center. We are currently working on extending the complexation to design binuclear complexes of Ni(II), such as [Ni2(5-MeO-m-xpt)2(OH2)]4+. The structural analysis and spectroscopic properties of the complexes will be discussed.

Chemistry of copper and nickel pyridyltriazole complexes

249th National Meeting (2015)

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