1 College of Material Science and Engineering, Guangdong Provincial Key Laboratory of New Energy Materials Service Safety, Shenzhen University, Shenzhen 518060, P. R. China. imanndavid@szu.edu.cn.
2 Key Laboratory of Biomedical Engineering of Hainan Province, School of Biomedical Engineering, One Health Institute, Hainan University, Haikou 570228, P. R. China. qintianyi@hainanu.edu.cn.
A dual-state-emission fluorescent probe undergoes H2O2-triggered structural transformation, producing a distinct color change from yellow to red in both aqueous media and living cells.