Synthesis and characterization of a luminescent Ni(II)-compound based on tpt and m-H2bdc detecting picric acid and chromate anions in aqueous

Designed, synthesized, structure and fluorescent probe studies Ni-MOF based on tpt and m-H2bdc. [Display omitted] •A stable Ni(II)-MOF has been hydrothermally synthesized based on tpt and m-H2bdc.•1 has excellent thermal and chemical stability.•1 exhibits excellent sensitivity and selectivity for detecting PA and CrO42−.•1 shows great anti-interferent ability and reusability for detecting PA and CrO42−. A new luminescent compound Ni4(tpt)4(m-bdc)4·H2O (1) (tpt = tris(4-pyridyl)triazine, m-H2bdc = m-benzenedicarboxylic acid) was successfully synthesized by hydrothermal method, and characterized using single-crystal X-ray diffraction, PXRD, TG analysis and IR. 1 possesses a four-connected three-dimensional (3D) topological network with the Schläfli symbols of {65⋅8}. 1 not only has excellent thermal and chemical stability, but also is a dual-functional luminescent sensor with high selectivity and sensitivity for detection of picric acid (PA) and chromate (CrO42−) anions in water via the luminescent quenching. And the sensing mechanism for the quenching process was discussed in detail. Moreover, 1 can be regenerated by a fast and simple method in detecting PA and CrO42−, showing excellent recyclability after the sensing experiment.