A turn-on and reversible fluorescence sensor with high affinity to Zn²⁺ in aqueous solution

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• 作者：Gyeong Jin Park ; Myoung Mi Lee ; Ga Rim You ; Ye Won Choi ; Cheal Kim ; ^{chealkim@seoultech.ac.kr" class="auth_mail}
• 关键词：Fluorescence ; CN isomerization ; Chelation-enhanced ; Reversible ; Zinc
• 刊名：Tetrahedron Letters
• 出版年：9 April, 2014
• 年：2014
• 卷：55
• 期：15
• 页码：2517-2522
• 全文大小：1675 K

文摘

A new simple receptor boldFont">1 based on aminosalicylimine was prepared. It exhibited an 鈥榦ff-on fluorescence type鈥?mode with high sensitivity in the presence of Zn²⁺. In particular, this chemosensor could clearly distinguish Zn²⁺ from Cd²⁺. Also, it could be a reusable chemosensor because the addition of EDTA quenched the fluorescence of the Zn²⁺-2路boldFont">1 complex. Furthermore, receptor boldFont">1 had a sufficiently low detection limit (68 nM) in aqueous solutions, which implies that boldFont">1 could sense the nanomolar concentration of Zn²⁺. Therefore, this sensor has the ability to be a practical system for the monitoring of Zn²⁺ concentrations in aqueous samples.