Photocatalytic performance and mechanism of Rhodamine B with two new Zn(II)-based coordination polymers under UV-light

Two new supramolecular coordination polymers of [Zn(L)(bib)] (1) and [Zn(L)(phen)] (2) (H2L = 1,3-bis(3-carboxylphenoxy)benzene, phen = 1,10-phenanthroline and bib = 1,4-bis(1-imidazoly)benzene), were hydrothermally prepared and full characterized. 1 exhibits 6-connected net with hxl topology having Schläfli symbol of {36.46.53}, while 2 shows 1D chain built by ZnII centers and L2− linkers. 1 and 2 demonstrated effectively photocatalytic performance to the disintegration of dyes Rhodamine B (Rh B), methyl orange (MO) and methylene blue (MB). The plausible mechanism displayed by 1 for the catalytic degradation toward Rh B was proposed using the trapping method and LC-MS studies.