Structural diversity and fluorescent sensing of four novel complexes based on rigid terphenyl-3,3″,5,5″-tetracarboxylic acid

• Published in: Journal of solid state chemistry 2019-06, Vol.274, p.280-285
• Main Authors: Liang, Jinxia, Zhao, Qiannan, Gao, Lingling, Zhang, Jie, Niu, Xiaoyan, Hu, Tuoping
• Format: Article
• Language: English
• Subjects: Complex; Fe(III) ion; Fluorescent properties; Nitrobenzene derivatives
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2019.03.047

Based on H4TPTC and 1,2-bimb/1,3-bimb ligands, four novel complexes, namely, {[Cu(TPTC)(1,2-bimb)2]·4.5(H2O)}n (1), [Cu(TPTC)0.5(1,3-bimb)]n (2), {[Eu2(TPTC)1.5(H2O)4]·4.5(H2O)·2(1,4–DOX)}n (3) and {[Ce(TPTC)(H2O)4]·0.5(H2O)·0.5(1,4–DOX)}n (4) have been constructed under solvothermal conditions [H4TPTC = terphenyl-3,3″,5,5″-tetracarboxylic acid, 1,3-bimb = 1,3-bis (imidazol-1-ylmethyl) benzene, 1,2-bimb = 1,2-bis (imidazol-1-ylmethyl) benzene]. Complexes 1 and 2 are 4-connected 2D networks with the topological types of sql (1) and kgm (2). Complex 3 exhibits a 4, 4, 12-connected network with the point symbol of {432.634}{44.62}{46}2. Complex 4 presents a 3D supramolecular network through hydrogen bonds. The fluorescent properties of complexes 1 and 3 showed that 1 has good fluorescence sensitivity for Cr2O72− and Fe3+ ions in aqueous solutions, and 3 can selectively detect NDVs. Furthermore, possible mechanism for luminescence quenching was also investigated. Four novel complexes have been synthesized based on rigid terphenyl-3,3″,5,5″-tetracarboxylic acid by solvothermal methods. The fluorescent properties of complexes 1 and 3 showed that 1 has good fluorescence sensitivity for Fe3+ and Cr2O72− ions in aqueous solutions, and 3 can selectively detect NDVs. [Display omitted] •Four complexes have been synthesized based on rigid terphenyl-3,3″,5,5″-tetracarboxylic acid by solvothermal methods.•Complex 1 has good fluorescence sensitivity for Fe3+/Cr2O72- ions in aqueous solution, and 3 can selectively detect NDVs.•The possible fluorescence quenching mechanism was also investigated.