Construction of a triazine polycarboxylate Co-MOF with flexible and rigid coordination arms as well as excellent catalytic reduction and adsorption properties

Abstract

A new compound [Co₂(H₂BATD)(DMF)₂]·2.5DMF·0.5H₂O (1) was synthesized from the triazine ligand H₆BATD (H₆BATD = 5,5′-(6-biscarboxymethylamino-1,3,5-triazine-2,4-diyl) bis (azadiyl), DMF = N,N-dimethylformamide) and Co(NO₃)₂·6H₂O. Compound 1 was characterized using infrared spectroscopy, UV-vis spectroscopy, PXRD, and thermogravimetry. The three-dimensional network of compound 1 was further constructed using [Co₂(COO)₆] building blocks from the flexible coordination arms and the rigid coordination arms from the ligand. In terms of functional properties, compound 1 can be used for the catalytic reduction of p-nitrophenol (PNP) to p-aminophenol (PAP), and compound 1 with a dose of 1 mg showed good catalytic reduction properties, as well as a conversion rate of over 90%. Based on the unique π-electron wall and carboxyl groups in the H₆BATD ligand that provide abundant adsorption sites, compound 1 can be used to adsorb iodine in cyclohexane solution.