Hypochlorite　ions　(ClO-)　are　widely　used　in　bleaching　agents　and　disinfectants.　However,　high　concentrations　of　chloride　species　are　harmful　to　human　health.　Therefore,　effective　methods　for　the　detection　of　ClOions　are　required.　In　this　study,　using　4-fluorophthalic　acid　and　glycine,　nitrogen-fluorine　codoped　carbon　nanodots　(N,F-CDs)　were　synthesized　by　one-pot　hydrothermal　synthesis　for　use　as　a　fluorescent　probe　for　the　fluorometric　detection　of　ClOin　aqueous　media,　based　on　the　inhibition　of　n　-＞　pi*　transitions.　The　excitation　and　emission　peak　centers　of　the　N,F-CDs　are　at　387　and　545　nm,　respectively.　The　N,F-CDs　show　a　fast　quenching　response　(＜1　min)　for　ClO　and　can　be　used　in　a　wide　pH　range　(pH　4-　13).　Under　optimal　conditions,　the　fluorescence　intensity　decreased　with　increase　in　the　ClOconcentra　tionfrom　0　to　35　mu　M,　anda　low　limit　of　detection　(9.6　nM)　was　achieved.　This　probe　possesses　excellent　selectivity　and　high　sensitivity　and　was　used　to　analyze　standardized　samples　of　piped　water,　achieving　a　satisfactory　recovery.　Thus,　this　nitrogen-fluorine　co-doped　nanodot　probe　is　promising　for　the　detection　of　pollutants.　(C)　2020　Elsevier　B.V.　All　rights　reserved.