A Reaction-Based Sensing Scheme for Gold Species: Introduction of a (2-Ethynyl)benzoate Reactive Moiety
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- 作者：Hyewon Seo ; Mi Eun Jun ; Olga A. Egorova ; Kyung-Ha Lee ; Kyong-Tai Kim ; Kyo Han Ahn
- 刊名：Organic Letters
- 出版年：2012
- 出版时间：October 5, 2012
- 年：2012
- 卷：14
- 期：19
- 页码：5062-5065
- 全文大小：261K
- 年卷期：v.14,no.19(October 5, 2012)
- ISSN：1523-7052
文摘
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 moiety for the development of gold probes with improved sensing properties.