Assembly of 1D, 2D and 3D silver(I) coordination polymers with nitrilotriacetate and 2-aminopyrimidyl mixed ligands
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Three mixed ligands coordination polymers (CPs) [Ag(1.5)(apym)(nta)(0.5)](n) (1), [(NH(4))Ag(2)(mapym)(nta)center dot(H(2)O)(3)](n) (2), [Ag(2)(dmapym)(3)(Hnta)](n) (3) (apym = 2- aminopyrimidine, mapym = 4- methyl- 2- aminopyrimidine, dmapym = 4, 6- dimethyl-2-aminopyrimidine, H3nta = nitrilotriacetate) were synthesized and characterized. For 1-3, as the substituents change from H to one methyl and two methyl groups, the dimensionalities of 1- 3 decrease from three- dimension (3D) to one- dimension (1D) due to the steric effect of methyl groups. For 1, the mu(2)-apym ligands link the Ag(I) ions to form a 1D double- chain incorporating ligand unsupported Ag center dot center dot center dot Ag interaction. The nta(3) ligands extend the 1D double-chain into a 3D framework. In 2, one heptadentate nta(3) ligand binds four Ag(I) ions and incorporates mu(2)-mapym ligand to link metal centers to form a 2D sheet which can be simplified to be a 103 net. Complex 3 features a 1D chain structure incorporating Hnta(2) and monodentate dmapym ligands. The substituents on the pyrimidyl ring intensively influence the coordination environments of metal ion and the coordination modes of the carboxyl group, and thus determine the structures of the CPs. The photoluminescent properties of 1-3 were also investigated. (C) 2010 Elsevier B.V. All rights reserved.
CitationINORGANICA CHIMICA ACTA，2011,368（1）：67-73