Two coordination polymers based on mixed 1,4-bis(benzimidazo-1-yl)benzene and O-donor linker ligands: syntheses, crystal structures and properties

Autor: Wei-Wei Cheng, Mei-Pin Liu, Youzhen Dong, Qing-Wen Liu, Zhuo-Ling Chen, Yun-Shan Xue, Rong-Rong Bian
Rok vydání: 2019
Předmět:
Zdroj: Transition Metal Chemistry. 44:445-454
ISSN: 1572-901X
0340-4285
DOI: 10.1007/s11243-019-00323-5
Popis: Two coordination polymers based on 1,4-bis(benzimidazo-1-ly)benzene (L) and O-donor linking co-ligands, namely {[ZnL(mipa)(H2O)]}n (1) and {[Cd2L2(sdba)Cl2]}n (2) (H2mipa = 5-methylisophthalic acid, H2sdba = 4,4′-sulfonyldibenzoic acid), have been synthesized under solvothermal conditions and structurally characterized by X-ray single-crystal diffraction. Compound 1 has a 1D chain structure, forming 2D layers by hydrogen bonds. Adjacent layers stack over each other in an ABCD manner along the c-axis to further pack into a 3D supramolecular structure supported by π–π interactions. Compound 2 possesses an intriguing 3D architecture, which is constructed from dinuclear [Cd2L4Cl2] secondary building units and V-shaped sdba2− linkers. Both compounds show strong photoluminescence at room temperature with peaks at 362 and 356 nm, respectively, assigned to intraligand and/or ligand-to-ligand charge transfer transitions. Compound 2 can be used as a highly selective probe for Hg2+ detection in aqueous solution based on luminescence quenching. The activity of compound 2 as a photocatalyst for the degradation of methylene blue under UV irradiation has been explored.
Databáze: OpenAIRE
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