A new fluorescent probe (DPP-AC) based on diketopyrrolopyrrole with an acrylate group was designed and synthesized for the sensitive and selective detection of biological thiols.
A molecular chemodosimeter , with a naphthalimide fluorophore connected to a newly designed phenazine energy acceptor, for the selective detection of cysteine was effectively synthesized. featured efficient intramolecular fluorescence resonance energy transfer (FRET) based on spectral overlap between the emission of naphthalimide and the absorption of phenazine. A cystamine chain with a S-S bond was applied to play the role of recognition moiety and the linker part. The specific reaction between the biological thiols and gave rise to an obvious fluorescence intensity enhancement at 540 nm, which is induced by cleavage of the disulfide bond followed by elimination of the FRET effect. High sensitivity and selectivity for cysteine over homocysteine and glutathione were also achieved. In addition, upon excitation at 400 nm, a relatively weak NIR emission provided an internal standard making a promising ratiometric sensor for cellular detection of cysteine.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.