Synthesis and characterization of MOFs constructed from 5-(benzimidazole-1-yl)isophthalic acid and highly selective fluorescence detection of Fe(iii) and Cr(vi) in water. Issue 57 (22nd September 2020) - Zhu, Bin
Abstract : In this work, four novel MOFs [Cd(bipa)] n (1 ), {[Zn2 (bipa)2 ]·2C2 H5 OH} n (2 ), {[Co(bipa)]·C2 H5 OH} n (3 ), {[Ni(bipa)2 ]·2DMA} n (4 ), (H2 bipa = 5-(benzimidazole-1-yl)isophthalic acid) were successfully synthesized under solvothermal conditions. Abstract : In this work, four novel metal–organic frameworks [Cd(bipa)] n (1 ), {[Zn2 (bipa)2 ]·2C2 H5 OH} n (2 ), {[Co(bipa)]·C2 H5 OH} n (3 ), {[Ni(bipa)2 ]·2DMA} n (4 ), (H2 bipa = 5-(benzimidazole-1-yl)isophthalic acid) were successfully synthesized under solvothermal conditions. Complexes 1–4 were characterized by powder X-ray diffraction, elemental analysis, infrared spectroscopy and thermogravimetric analysis. Interestingly, the coordination patterns and 3D network structures of complexes 1–3 are very similar, while complex 4 is relatively unique. Complexes 1–2 exhibit potential fluorescent properties. Complex 1 can selectively and sensitively detect trace Fe(iii ) and Cr(vi ) in water by fluorescence quenching detection, and the quenching mechanism is further discussed.