Two organic salts mainly relying on hydrogen bonding: pyromellitic acid phenanthroline salts

Abstract

Two pure organic supramolecular complexes (Hphen)+[C6H2(COOH)3(COO)]-·H2O(1) and (Hphen)+ [C6H2(COOH)3(COO)]- (2) were synthesized by solution self-assembly method (natural volatilization method). The two organic salts were characterized by X-ray Single Crystal Diffraction, Elemental Analysis, Fourier Transform Infrared Spectrometer (FT-IR), Thermogravimetric Analysis (TG), Differential Scanning Calorimetry (DSC) and Fluorescence Spectroscopy (FL), etc. The results showed that two Organic complexes mainly rely on weak chemical effects such as hydrogen bonds to stably exist. Hydrogen bond is a bridge that connects molecules to form supramolecular compounds, it assembles ligand molecules (or ions) into new molecular aggregates with one-dimensional or multi-dimensional structure, and plays a huge role in the formation of the supramolecular structure of complexes. The complex (1) emits a strong characteristic spectrum of o-phenanthroline under 281 nm ultraviolet light.