Abstract
Detecting antibiotics and heavy metal ions in water system are great crucial to protect environment. Two new ternary coordination polymers (CPs), [Cd(HBTC)(L)1.5]n (1) and {[Cd(TBTA)(L)]·H2O}n (2) (H3BTC = 1,3,5-benzenetricarboxylic acid, H2TBTA = tetrabromoterephthalic acid, and L = 1,4-bis(benzimidazole-2-yl)butane) were prepared under the hydrothermal conditions. 1 possesses a 1D infinite chain which further extended into a 3D supramolecular network through O–H⋯O hydrogen bonding interactions, while 2 exhibits a 3D dia framework. 1 and 2 display excellent thermal and chemical stability. Moreover, Both CPs can be as the difunctional fluorescent sensors with high sensitivity, selectivity, and low limit of detection, which can detect enrofloxacin and Fe3+ (for 1), tetracycline and Cr2O72− ions (for 2) in aqueous solution through the fluorescence quenching effects process.
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