Investigation of Fluorescent Optical Properties of Fluorine-Boron Cored Dye

Abstract

In this contribution, an F-B containing dye is readily synthesized. In chloro-carbon medium, it exhibit good solubility and stability. The emission peak value is determined to be 519 nm in chloroform. The highly emissive character is ascribed to the coordination lock, which inhibits the free rotation of methoxybenzene around the single bond. This BF2 locker inhibits the energy dissipation by thermal vibration to an extent and results strong fluorescence emission. In addition, electron deficiency feature of B atom also contributes to its strong emission character. Even though the π-conjugate system is small, the emission shifted significantly and the Stoke’s shift reaches to 170 nm. In addition, the film by doping into polycarbonate is also emissive. In solid state, the emission maximum reaches to 529 nm. Both in film and in solid, only slightly redshift are observed, demonstrating less interference of intermolecular interaction toward the excited dye molecules.