2-Aryl-3H-1,3-benzazaphosphole Oxides: Synthesis, Optical Properties, and Excited State Intramolecular Proton Transfer

We report on a series of 2-aryl-3H-1,3-benzazaphosphole oxides that were efficiently prepared via sequential C-P cross-coupling, dehydrative [3 + 2] cycloaddition, and ring-oxidation reactions. The inclusion of one nitrogen atom into the benzophosphole framework caused red shifting of the absorption and emission maxima, reflecting the greater stabilization of the LUMO level. 2-(2-Hydroxyphenyl)benzazaphosphole oxide underwent excited state intramolecular proton transfer and emitted a weak fluorescence from the excited state of the N-H tautomer.PMID:38590165 | DOI:10.1002/chem.202400807

Source: Chemistry - April 9, 2024 Category: Chemistry Authors: Hiroaki Nakagomi Nina Murayama Rika Takegami Kaori Fujii Rio Kitakado Yoshifumi Kimura Mao Minoura Haruyuki Nakano Yoshihiro Matano Source Type: research