A Highly Selective Fluorescent Probe for Hydrogen Sulfide and its Application in Living Cell

A new Near-infrared fluorescent probe for hydrogen sulfide detection was synthesized by employing dicyanoisophorone based fluorescence dye as a fluorophore and methyl 3-(2-(carbonyl)phenyl)-2-cyanoacrylate group as the response unit. The Probe DCI-H₂S showed a long emission wavelength (λem = 674 nm). Based on the H₂S-induced addition–cyclization of deprotecting methyl 3-(2-(carbonyl)phenyl)-2-cyanoacrylate group, the probe DCI-H₂S showed high selectivity, sensitivity and response speed toward hydrogen sulfide under room temperature. These numerous advantages of the probe DCI-H₂S make it to potentially detect endogenous hydrogen sulfide in living organisms.