Fluorescence detection of Mn2+, Cr2O72− and nitroexplosives and photocatalytic degradation of methyl violet and rhodamine B based on two stable metal-organic frameworks

Abstract

The reaction of Zn(NO3)2·6H2O/Cd(NO3)2·4H2O with a semi-flexible ligand 4′-(4-(3,5-dicarboxylphenoxy)phenyl)-4,2′:6′,4′′-terpyridine (H2dbp) gave two new metal-organic frameworks of [Zn(dbp)]n (1) and [Cd(dbp)(H2O)·2H2O·CH3CN]n (2). Single crystal X-ray diffraction analyses reveal that both 1 and 2 show three-dimensional, two-fold interpenetrating four-connected networks with 44.610.8 topology. The photoluminescence investigation indicates that both 1 and 2 could be prospective candidates for developing luminescence sensors for the sensing of Mn2+, Cr2O72− and nitroaromatic analytes. Furthermore, the photocatalysis properties of 1-2 for the degradation of methyl violet and rhodamine B were examined.