Abstract
Hydrogen peroxide (H(2)O(2)) plays an important role in the human body and monitoring its level is meaningful due to the relationship between its level and diseases. A fluorescent sensor (CMB) based on coumarin was designed and its ability for detecting hydrogen peroxide by fluorescence signals was also studied. The CMB showed an approximate 25-fold fluorescence enhancement after adding H(2)O(2) due to the interaction between the CMB and H(2)O(2) and had the potential for detecting physiological H(2)O(2). It also showed good biocompatibility and permeability, allowing it to penetrate cell membranes and zebrafish tissues, thus it can perform fluorescence imaging of H(2)O(2) in living cells and zebrafish. This probe is a promising tool for monitoring the level of H(2)O(2) in related physiological and pathological research.