Highly sensitive fluorescent chemosensor for hypochlorite anion based on a novel irreversible ring-opening strategy

A novel strategy to design a fluorescent chemosensor for OCl− which can be used over a pH span of 6–11 by integrating the reactive phenylhydrazo group within rhodamine 6G has been achieved. Upon the reaction with OCl−, a significant fluorescence enhancement was triggered with a detection limit down to the 10−9 M range.