Poly[diaqua(μ₂-1,3-di-4-pyridylpropane-κ²N:N′)(μ₂-thiophene-2,5-dicarboxylato-κ²O:O′)nickel(II)]: a two-dimensional bilayered coordination polymer

Abstract

The hydrothermally prepared title compound, [Ni(C6H2O4S)(C13H14N2)(H2O)2]n, is an Ni polymer based on thiophene‐2,5‐dicarboxylate dianions (tda2−) and 1,3‐di‐4‐pyridylpropane (bpp) ligands. Each Ni atom is coordinated by two carboxylate O atoms from two independent tda2− groups along the a direction, two N atoms from two bpp ligands along the b direction, and two aqua O atoms, in a distorted octahedral geometry. This leads to a two‐dimensional grid‐type bilayer assembly running parallel to the (001) plane, in which the bilayer is formed through intermolecular O—H...O hydrogen bonds.

Synthesis, Ab Initio X-ray Powder Diffraction Crystal Structure, and Magnetic Properties of Mn3(OH)2(C6H2O4S)2 Metal–Organic Framework

“…The bridging mode found here is unprecedented for the tdc linker. Supporting Information, Scheme S1 summarizes, to the best of our knowledge, all the coordination modes observed for tdc in MOFs and coordination polymers − ,,,− or complexes, − as well as the new one found in Mn 3 (OH) 2 (C 6 H 2 O 4 S) 2 MOF. The final geometry of tdc obtained here from synchrotron XRPD data (without any constraints) compares very well with that of the optimized molecule (see Supporting Information, Figure S6).…”

“…In the case of the direct synthesis of MOFs, the shorter thiophenedicarboxylate, namely, 2,5-thiophenedicarboxylate (tdc), has taken a major place because of its good solubility in various solvents. In these tdc-based materials, this linker can either acts as the only ligand ,,,,, in combination with small O-donor or N-donor molecules (hydroxide, water, ,,,, methanol, ethanol and dimethylformamide , ), or as a coligand ,,, in combination with other large ligands (pyridine, bipyridine, ,, phenantroline, 1,3-bis(4-pyridyl)propane, , oxalate, 1-methyl-3-ethylimidazolium and propane-1,3-diamine). The rich structural diversity found in MOFs containing tdc has been attributed to its “V-shaped” configuration yielding various coordination modes. , Among MOFs including tdc, one can distinguish Ni 3 (OH) 2 (tdc) 2 (H 2 O) 4 as the only one containing hydroxide groups .…”