A Stable EU (III) Coordination Polymer for Sensitive and Selective Sensing of Fe3+/Cr2o72- ions in Aqueous Medium
6 Pages Posted: 14 Aug 2020
A lanthanide coordination polymer [Eu(BCPB)(H2O)2]n (1) was synthesized based on a semirigid tripodal polycarboxylic acid ligand (H3BCPB = 3,5-bis(2-carboxy-phenoxy)-benzoic acid). Single crystal X-ray diffraction analyses showed that compound 1 exhibits 2D layer structures with [Eu6(COO)22(H2O)12] SBU. Furthermore, fluorescence tests demonstrated that 1 has highly sensitive detection for Fe3+/Cr2O7 2− ions in aqueous solution by a fluorescence quenching effect. Meanwhile, the quenching mechanisms of 1 for Fe3+ and Cr2O7 2− were also investigated in detail.
Keywords: Semirigid polycarboxylic acid ligandLanthanide coordination polymerFe3+ cationCr2O72− anionSensing
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