Synthesis, Structure and Fluorescent Property of a Novel 3D Rod‐Packing Microporous Zn(II) MOF Based on a Temperature‐Induced In Situ Ligand Reaction

Abstract

AbstractThe self‐assembly process of 2,2′‐bipyridine‐4,4′,6,6′‐tetracarboxylic acid (H4bptc) and Zn(II) centers has been implemented under hydrothermal condition, while surprisingly, due to the high reaction temperature, the H4bptc ligand transformed into 2,2′‐bipyridine‐4,6,6′‐tricarboxylic (H3bptc′) with an unexpected in situ ligand reaction (hydrothermal decarboxylation) during the synthetic process. And finally, a novel Zn(II) MOF {[Zn1.5(bptc′)(H2O)]⋅H2O}n (1) has been obtained, which is characterized by single‐crystal X‐ray diffraction, powder X‐ray diffraction (PXRD), thermogravimetric analyse (TGA), elemental analyse (EA) and infrared spectroscopy (IR). In MOF 1, the 1D [Zn1‐O6,6′‐carboxyl‐Zn2]n double chains are connected by the 4‐carboxyl of R‐ or S‐bptc′ ligands into a 3D double‐walled rod‐packing framework with three kinds of windows. In addition, the solid‐state fluorescent property of 1 was conducted at room temperature, and meanwhile, 1 showed high selectivity and sensitivity for MnO4− ion by fluorescent quenching effect.