Hypochlorous acid(HCl O) is one of the biologically important reactive oxygen species(ROS), which plays important roles in the human immune defence system, and contributes to the destruction of invading bacteria and pathogens. But excessive formation of HCl O can lead to tissue damage and a series of human diseases, such as atherosclerosis, arthritis and even cancers, etc. Therefore, a rapid, sensitive, and selective detection of HCl O in biological samples is important. In recent years, fluorescent probes ...