A family of silver(I) complexes built with 2-sulfoterephthalic acid monosodium salt and different aminopyridine ligands: Syntheses, structures and properties

Five Ag(l) coordination complexes, namely, [Ag-6(2-stp)(2)(3-methyl-2-apy)(3)center dot H2O](n) (1), [Ag-3(2-stp)(4-methyl-2-apy)(3)](n) (2), [Na2Ag18(2-stP)(4)(2-HstP)(4)(5-methyl-2-aPY)(16) (H2O)(4)center dot 11H(2)O](n) (3), Ag-3(2-stP)(6-methy-2-apy)(4)center dot H2O (4), and [Ag-6(2-stp)(2)(6-methyl-2-apy)(8)(H2O)(2)center dot H2O](n) (5) (2-NaH(2)stp = 2-sulfoterephthalic acid monosodium salt, 3-methyl-2-apy = 3-methyl-2-aminopyridine, 4-methyl-2apy = 4-methyl-2-aminopyridine, 5-methyl-2-apy = 5-methyl-2-aminopyridine, 6-methyl-2-apy = 6-methyl-2-aminopyridine), have been synthesized and structurally characterized. Complexes 1 and 2 show two-dimensional network. In complex 3, the adjacent Agio units are bridged by 5-methyl-2-apy ligands to form a 2D infinite undulated sheet. Adjacent 2D sheets are linked by coordinative bonds between carboxylic oxygen atoms and Na(I) ions to form a 3D coordination polymer. Complex 4 is a O-D discrete trinuclear molecule, and the self-complementary the O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonds incorporating hydrogen bond motifs extend these molecules into a 2D supramolecular framework. Compound 5 exhibits 1D-chain structure. However, complex 5 shows 3D supramolecular structure results from the linkage of neighboring layers through a rich hydrogen-bonding between uncoordinated sulfonates, amino groups and coordinated carboxylates. The thermogravimetric analyses and photoluminescence of the complexes were also investigated. (C) 2017 Elsevier B.V. All rights reserved.