A reaction-based sensing scheme for gold species: introduction of a (2-ethynyl) benzoate reactive moiety

H Seo, ME Jun, OA Egorova, KH Lee, KT Kim…

Index: Seo, Hyewon; Jun, Mi Eun; Ahn, Kyo Han; Egorova, Olga A.; Lee, Kyung-Ha; Kim, Kyong-Tai Organic Letters, 2012 , vol. 14, # 19 p. 5062 - 5065,4

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Citation Number: 34

Abstract

To alleviate side reactions identified in an N-propargyl-rhodamine lactam sensing system, we devised the novel reaction-based sensing scheme for gold species based on the alkynophilicity. A fluorescein (2-ethynyl) benzoate underwent Au (III)-promoted ester hydrolysis selectively over other metal ions with high sensitivity, which accompanies a turn- on fluorescence change in pH 7.4 HEPES buffer. The work offers a versatile reactive ...

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