Abstract

Hypochlorous acid (HClO) and its ionic form (ClO−), as important components of reactive oxygen species, were produced mainly in mitochondria and participated in various biological processes, and they abnormal level could cause various diseases and threaten human health. Hence, a “turn‐on” phosphorescent probe Ir‐DAMN based on Ir (III) complex was synthesized to monitor HClO/ClO− in DMF/PBS solution and living cells. Due to isomerization of C=N bond, probe Ir‐DAMN exhibited very weak phosphorescence initially, which displayed obvious phosphorescent enhancement at 620 nm after upon addition with ClO−. Confocal bioimaging experiments implied that probe Ir‐DAMN possessed good cell membrane permeability, specific localization of mitochondria and could achieve detection of exogenous and endogenous HClO/ClO− in the living cells.

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