Dibenzophosphaborin: A Hetero-π-conjugated Molecule with Fluorescent Properties Based on Intramolecular Charge Transfer between Phosphorus and Boron Atoms

Abstract

[reaction: see text] The first dibenzo-1,4-phosphaborins were synthesized and characterized by X-ray crystallographic analysis. The phosphaborins exhibited UV/vis absorption derived from intramolecular charge transfer from the phosphorus atom to the boron atom. The phosphaborins showed different fluorescent properties depending on the substituents on the phosphorus atom.