Abstract
Guided by mixed ligands strategy, a novel binuclear cadmium(II) coordination polymer, {[Cd2(HDDB)(m-bib)(H2O)2]·1.5H2O·DMF}n (1) [H5DDB = 3,5-di(2′,4′-dicarboxylphenyl)benozoic acid, m-bib = 1,3-bis(imidazol-1-yl)benzene], was constructed under solvothermal condition and then was further characterized by X-ray crystallography, IR, EA, TG, and PXRD. Structure analysis shows 1 displaying a new (3,4)-c {6.82}4{62.84} sheet when HDDB4− ligands and the [Cd2(COO)2] SBUs were simplified into 3-connected and 4-connected nodes. And further fluorescence analysis revealed that 1 showing outstanding performances as efficient chemo-sensor in the detection of NFT antibiotic in aqueous solution with low LOD, high selectivity, high sensitivity, and strong anti-interference. Besides, the mechanisms of luminescence quenching were explored from the viewpoints of inner filter effects (IFE) and the photo-induced electron transfer (PET), implied by the optical spectroscopy and quantum chemical calculation. Based on the mixed ligands strategy, a 2D binuclear Cd(II)CP was constructed and can be act as efficient chemo-sensor in the detection of NFT antibiotic in aqueous solution.
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