Front Cover: 3′-O-(2-Nitrobenzenesulfonyl)fluorescein as a Fluorescent Probe for Hydrogen Polysulfides by Straightforward One-Step Deprotection (Anal. Sens. 3/2023)

The cover picture represents selective visualization of hydrogen polysulfides (H₂S_n, n≥2) over other RSS, ROS and RNS by a fluorogenic reaction of 3′-O-(2-nitrobenzenesulfonyl)fluorescein, chosen as a practical H₂S_n probe from the candidate pool of 2- or 4-nitrobenzenesulfonylated fluorescein derivatives that were evaluated. This fluorogenic response occurred by straightforward one-step deprotection of the probe with H₂S_n in a selective and sensitive manner. Cover design by Yuka Shinohara. More information can be found in the Research Article by K. Tsukamoto, H. Maeda, and co-workers.