Structural variation in silver(I) complexes with pyridazine ligand and aromatic polycarboxylic acids: Structural analysis with silver chains

摘要

To systematically explore the influence of pyridazine ligands and aromatic polycarboxylate on the existence of argentophilicity, four inorganic-organic hybrid Ag(I) complexes were obtained by one-pot ultrasonic reaction. Four complexes were named [Ag-6(pdz)(2)(btc)(2)](n) (1), [Ag-2(pdz)(npt)](n) (2), [Ag-2(pdz)(pma)(1/2)](n) (3), and [Ag-2(pdz)(npa)center dot H2O](n) (4) (pdz = pyridazine, H(3)btc = 1,3,5-benzene tricarboxylic, H(2)npt = 3-nitrophthalic acid, H(4)pma = pyromellitic acid, H(2)npa = 1,4-naphthalenedicarboxylic acid). Structural analyses reveal that complexes 1-4 display diverse 2D or 3D frameworks, which all of the N-donor pdz ligands exhibit the same coordination mode but the distances of the silver atoms which link to the pdz ligands are different to each other. Complex 1 shows Ag6 clusters and the cluster is comprised by two distorted tetrahedron silver units. And the clusters are shared by two silver ions to form 1D silver chains. Complex 2 features 1D silver chains which are formed by the Ag-4 units and the four Ag(I) ions are in the vertices of parallelogram. Complex 3 is an interpenetrating architecture with the pdz ligands alternately repeating up and down in ac plane. The structure of complex 4 is a 2D layer structure which the pdz and npt ligands alternately repeat along a axis. Moreover, complexes 1-4 indicate different photoluminescence behaviors in the solid state. (C) 2014 Elsevier B.V. All rights reserved.