Recent advances and perspectives in reaction-based fluorescent probes for imaging peroxynitrite in biological systems

•Peroxynitrite is irreplaceable physiological activator and signaling molecule in living organisms.•A review of oxidized peroxynitrite imaging fluorescent probes based on reactive recognition sites and its imaging studies in biological systems.•Systematic conclusion and classification of reaction recognition sites for peroxynitrite fluorescent molecular probes.•This review can provide an empirical reference for the design and synthesis of subsequent ONOO– fluorescent probes.