A Ni(II) Coordination Polymer as a Multifunctional Luminescent Sensor for Detection of UO(2)(2+), Cr(2)O(7)(2−), CrO(4)(2−) and Nitrofurantoin

A new Ni coordination polymer [Ni(MIP)(BMIOPE)](n) (1) was constructed (BMIOPE = 4,4′-bis(2-methylimidazol-1-yl)diphenyl ether, and H(2)MIP = 5-methylisophthalic acid), possessing two-dimensional (2D) twofold parallel interwoven net structure with a 4(4)∙6(2) point symbol. Complex 1 has been successfully obtained based on mixed-ligand strategy. The fluorescence titration experiments revealed that complex 1 could act as multifunctional luminescent sensor to simultaneously detect UO(2)(2+), Cr(2)O(7)(2−) and CrO(4)(2−), and NFT (nitrofurantoin). The limit of detection (LOD) values for complex 1 are 2.86 × 10(−5), 4.09 × 10(−5), 3.79 × 10(−5) and 9.32 × 10(−5) M for UO(2)(2+), Cr(2)O(7)(2−), CrO(4)(2−) and NFT. The K(sv) values are 6.18 × 10(3), 1.44 × 10(4), 1.27 × 10(4) and 1.51 × 10(4) M(−1) for NFT, CrO(4)(2−), Cr(2)O(7)(2−) and UO(2)(2+). Finally, the mechanism of its luminescence sensing is studied in detail. These results manifest that complex 1 is a multifunctional sensor for sensitive fluorescent UO(2)(2+), Cr(2)O(7)(2−), CrO(4)(2−) and NFT detection.