Three series new NH2-benzophosphole oxides were synthesized from cycloaddition of o-aminophenyl phosphine oxide with alkynes. Photophysics investigation and theoretical calculation indicate that the position of amino group in these benzophosphole oxides obviously regulate their properties. 4-NH2-benzo[b]phosphole oxides show strong fluorescence emission and high fluorescence quantum efficiency. This “One stone three birds” process provides rapid access to multiple organophosphorus based luminogens for the structure–property relationship study.
Supplementary Material 1