Two novel lineal d10 metal-organic frameworks with a ditopic flexible linker: Structures, blue luminescence and thermal stability

Two novel supramolecular Ag(I) complexes, {[AgL]NO3}(n) (1), and {[AgL]CF3SO3}(n) (2), (L) = ethane-1,2-diyl bis(pyridine-3-carboxylate) have been prepared by self-assembly of Ag(I) salts with ethane-1,2-diyl bis (pyridine-3-carboxylate) (L) in THF/H2O system. The IR, TGA and elemental analysis have been recorded and both complexes were structurally characterized by X-ray crystallography confirming that complexes (1) and (2) are one-dimensional coordination polymers with lineal and helical chain motifs respectively. Solid emission spectra at room temperature of (1) and (2) show interesting blue phosphorescence with maximum intensity at 414 and 411 nm respectively, which are assigned to (LLCT) transition. (C) 2011 Elsevier B.V. All rights reserved.