5-Nitro-isophthalic acid based Co(II)-coordination polymers: Structural diversity tuned by imidazolyl ligands, efficient dye degradation and luminescence sensing

• Published in: Polyhedron Vol. 206; p. 115339
• Main Authors: Yang, Yuting, Tu, Changzheng, Liu, Zining, Wang, Jianling, Yang, Xiaoli, Cheng, Feixiang
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.09.2021
• Subjects: 5-Nitro-isophthalic acid; Imidazolyl; Photo-degradation; Sensing behavior; Imidazolyl; Sensing behavior; 5-Nitro-isophthalic acid; Photo-degradation
• ISSN: 0277-5387
• DOI: 10.1016/j.poly.2021.115339

Three new coordination polymers with 2D and 3D architectures formed by H2nip and different configurations of imidazolyl ligands were structurally characyerized. Complex 1 is an effective and stable photocatalyst for the photodegradation of MEB. Complexes 1 and 3 reveal promising luminescent sensors towards Fe3+ ion. [Display omitted] Three new coordination polymers with the formulas of {[Co(nip)(bibp)]·0.5(H2O)}n (1), [Co(nip)(bimh)]n (2), {[Co(nip)(titb)]·H2O}n (3) (H2nip = 5-nitro-isophthalic acid, bibp = 4,4′-bis(imidazol-1-yl)biphenyl, bimh = 1,6-bis(imidazol-1-yl)-hexane, titb = 1,3,5-Tris(imidazol-1-ylmethyl)-2,4,6-trimethylbenzene) were synthesized and structurally characyerized. Compound 1 has 2D (36)-hxl layer topology structure. Compound 2 shows a two-fold interpenetrating 2D 44 square-grid planar network (44-sql) in which 1D [Co(nip)]n chains are interconnected by bimh ligand. Compound 3 possesses a 3D (3,5)-connected topological structure with a (63)(69·8) Schläfli symbol. Furthermore, the heterogeneous catalytic oxidation activity of 1 toward methylene blue in the presence and abserence of H2O2 are investigated in aqueous solution. And both compounds 1 and 3 exhibit selective sensing toward Fe3+ through the luminescent quenching experiments.