A multifunctional four-fold interpenetrated coordination polymer: Quantifiable evaluation of luminescent sensing for Cr(VI)/Cu(II) and photocatalytic properties

A four-fold interpenetrated coordination polymer {[Zn2(L)(bibp)3]·DMF·H2O}n (1) (H4L = 5,5′-(biphenyl-4,4′-diylbis(methylene)) bis(oxy) diisophthalicacid, bibp = 4,4′-bis(imidazolyl)biphenyl) has been rationally constructed, successfully solvothermally synthesized. Complex 1 was characterized by single-crystal X-ray diffraction, elemental analysis, IR spectra, powder X-ray diffraction (PXRD), and thermogravimetric (TG) analysis, and it shows a 3D four-fold interpenetrated bbf-topological framework. Luminescence studies demonstrate that 1 has high selectivity and sensitivity for pollutant Cr(VI) (CrO42− and Cr2O72−) anion and Cu(II) cation; Photocatalytic studies show that 1 exhibits great degradation activity of four organic dyes (methylene blue (MB), Rhodamine B (RhB), Methyl orange (MO) and Orange IV (OIV)). Meanwhile, the possible mechanism of the photocatalytic property has been deduced.