Synthesis, Characterization, and Investigation of Optical Properties of New Schiff Base-Boron Complexes Bearing Sulfonamide Moiety

Abstract

This article presents the synthesis of a series of new boron complexes containing a sulfonamide moiety and the characterization of their structures using spectroscopic methods, including FT-IR, UV-Vis, ¹H-NMR, ¹³C-NMR, and ESI-MS. Theoretical and experimental investigations of the optical properties of the synthesized compounds also revealed their optical band gaps and maximum absorption wavelengths. The theoretical calculations were carried out using the Gaussian09 package at the HSEH1PBE/cc-pVDZ level of theory, and the molecular frontier orbitals (HOMO-LUMO) were analyzed. Comparative evaluation of the experimental and theoretical data showed that the newly synthesized sulfonamide-derived boron complexes exhibited distinct fluorescence properties.