Understanding the Selectivity of a Multichannel Fluorescent Probe for Peroxynitrite Over Hypochlorite
journal contributionposted on 10.02.2016 by Quanjuan Zhang, Na Zhang, Yi-Tao Long, Xuhong Qian, Youjun Yang
Any type of content formally published in an academic journal, usually following a peer-review process.
Peroxynitrite is a prominent biological reactive nitrogen species from radical combination of nitric oxide and superoxide and fundamentally involved in broad spectrum physiological and pathological processes. Though redox-inert itself, peroxynitrite anion (OONO–) attacks various biological electrophiles to generate an array of potent 2-e– or 1-e– oxidants, which result in cell injuries. Development of fluorescent probes for peroxynitrite, free from interference from hypochlorite, has been an active endeavor of the chemical community. We previously reported a peroxynitrite probe (PN600), which could differentiate hypochlorite from peroxynitrite through a multichannel signaling mechanism. Herein, this intriguing selectivity was accounted for through a structure–reactivity relationship study. Also, this work, together with rich literature contributions, has allowed a qualitative guideline in the use of electron-rich aromatic moieties to design probes against peroxynitrite and/or hypochlorite. The viability of this guideline was further testified by development of another list of peroxynitrite selective probes.