A series of 2-D and 3-D silver(i) coordination polymers constructed from a new angular-shaped di-2-pyrazinylsulfide: role of anions in molecular construction

Abstract

Seven coordination polymers (CPs) based on a new multidentate di-2-pyrazinylsulfide (DpzS) ligand and various anions, namely {[Ag₃(DpzS)₂(ClO₄)₂](ClO₄)}_∞ (1), [Ag₃(DpzS)₂(CF₃SO₃)₃]_∞ (2), {[Ag₃(DpzS)₂(CF₃SO₃)(H₂O)₂](CF₃SO₃)₂·H₂O}_∞ (3), [Ag₂(DpzS)(NO₃)₂(H₂O)]_∞ (4), [Ag(DpzS)(NO₂)]_∞ (5), [Ag₂(DpzS)(NO₂)₂]_∞ (6) and [Ag₂(DpzS)(C₂F₅CO₂)₂]_∞ (7), have been synthesized and fully characterized by IR spectroscopy, elemental analyses, single crystal X-ray diffraction and powder X-ray diffraction. In 1–7, the DpzS ligand exhibits diverse coordination modes with various silver(I) salts, yielding fascinating 2-D and 3-D topological frameworks. The effect of the anion, such as the size and geometry, on the structural diversities of 1–7 has been discussed. In addition, the role played by anion–π(pyrazinyl) interaction in the supramolecular assembly of 1–7 has also been studied.