Two 2-fold interpenetrated polythreading networks assembled by 4,4′-sulfonyldibenzoic acid and N-donor ligand

<div><p>Self-assembly of Ni<sup>II</sup>/Co<sup>II</sup> with 4,4<b>′</b>-sulfonyldibenzoic acid (H<sub>2</sub>E1) and 1,4-bis(1,2,4-triazole-1-ylmethyl)benzene (pbtx) has produced 3-D interpenetrated polythreading networks with non-trivial linkages, [{Ni(pbtx)(E1)(H<sub>2</sub>O)}·H<sub>2</sub>O]<sub>n</sub> (<b>1</b>) and [{Co(pbtx)(E1)(H<sub>2</sub>O)}·H<sub>2</sub>O]<sub>n</sub> (<b>2</b>), respectively. Single-crystal X-ray diffraction analyses revealed that <b>1</b> and <b>2</b> are isomorphous and isostructural. Complexes <b>1</b> and <b>2</b> possess a 2-D grid layer consisting of metal ions bridged by pbtx ligands and entirely deprotonated E1<sup>2−</sup> ligands, which led to the formation of 2-fold interpenetrated polythreading networks. The interpenetrated networks were further bridged by C–H⋯O and O–H⋯O hydrogen bonds to generate their 3-D frameworks. Further characterizations including elemental analysis, FT-IR, XPRD, and Thermogravimetric analysis have been studied.</p></div>