Lanthanide-Organic complex with uncoordinated lewis basic triazolyl sites as multi-responsive sensor for nitrobenzene, Cu2+ and MnO4-

Ln-coordination polymer {Tb(BTTA)(1.5)(H2O)(4.5)]n (Tb-1) was successfully obtained via solvo-thermal reaction of Tb(NO3)(3)center dot 6H(2)O and 2,5-bis-(1H-1,2,4-triazol-1-yl) terephthalic acid (H(2)BTTA). The measurement of single-crystal X-ray diffraction exhibits that complex Tb-1 displays two-dimensional lay-by-lay frameworks with one-dimensional channels along b direction. Owning to its high stability in aqueous solution and organic solvent, as well as its exposed Lewis basic centers, Tb-1 was selected for luminescence probe experiments on anions, cations and organic small molecules. The results display that Tb-1 not only shows high selectivity and sensitivity for the recognition of Cu2+ and MnO4- with lower detection limits as 1.22 mu M and 0.39 mu M, respectively, but also exhibits high recognition ability and low detection limit (2.71 mu M) for nitrobenzene (NB).

Automated summary

Ln-coordination polymer Tb(BTTA)(1.5)(H2O)(4.5)]n (Tb-1) was successfully synthesized, displaying two-dimensional frameworks with one-dimensional channels. Tb-1 showed high selectivity and sensitivity for Cu2+ and MnO4-, as well as high recognition ability and low detection limit for nitrobenzene.