3′-O-(2-Nitrobenzenesulfonyl)fluorescein as a Fluorescent Probe for Hydrogen Polysulfides by Straightforward One-Step Deprotection

Invited for this month's cover is the group of Prof. Hatsuo Maeda at Hyogo Medical University, Japan. The cover picture features selective visualization of hydrogen polysulfides (H₂S_n, n ≥ 2) over other related species through a fluorogenic reaction of 3′-O-(2-nitrobenzenesulfonyl)fluorescein, that was screened as the best practical H₂S_n probe among 2- or 4-nitrobenzenesulfonylated fluorescein derivatives. More information can be found in the Research Article by K. Tsukamoto, H. Maeda, and co-workers.