Abstract
Two 1-D lanthanide-based CPs (coordination polymers), Eu-CP and Tb-CP, have been solventhermally synthesized from a phenolic-linked tricarboxylate ligand 1,3,5-tri(2-carboxyphenoxy)benzene (H3L). Both complexes demonstrate stability and strong characteristic luminescence emissions in organic and water media. They also possess excellent luminescence sensing activities toward Fe3+ and Cr2O72−/CrO42− in DMF and aqueous solutions as well as simulated biological system. Notably, Tb-CP is one of the very few examples to effectively distinguish between CrO42− and Cr2O72− in aqueous and HEPES media. Both CPs could be simply and quickly regenerated at least five circles. The research on sensing mechanism indicated that the luminescence quenching may be related with the energy competition and weak interactions between CPs and sensing analytes.
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