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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Time-dependent fluorescence specturm changes of probe BH (5 μM) toward H2S (500 μM) in aqueous solution of DMSO/PBS (v/v 1/1, pH 7.4); inset: fluorescence intensity at 594 nm and 542 nm as a function of detection time.