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A sensitive fluorescent probe for cysteine and Cu2+ based on 1,8-naphthalimide derivatives and its application in living cells imaging

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Abstract A new 1,8-naphthalimide derivative (NAD) was synthesized and employed as a highly sensitive and selective probe for the detection of cysteine (Cys) and Cu2+. The terminal olefin of NAD… Click to show full abstract

Abstract A new 1,8-naphthalimide derivative (NAD) was synthesized and employed as a highly sensitive and selective probe for the detection of cysteine (Cys) and Cu2+. The terminal olefin of NAD could react with Cys and resulting in fluorescence quenching, with the adding of Cu2+, the schiff base unit of NAD could coordinate with Cu2+ and lead to a highly selective fluorescence “turn-on” response. The detection limits reached as low as 25 nM for Cys and 11 nM for Cu2+. In addition, the NAD probe can be further applied to cells imaging owing to its photostability and low cytotoxicity.

Keywords: fluorescent probe; sensitive fluorescent; cells imaging; cysteine; cu2; probe

Journal Title: Tetrahedron
Year Published: 2017

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