A dual chemosensor: Colorimetric detection of Co²⁺ and fluorometric detection of Zn²⁺

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• 作者：Seong Youl Lee¹ ; So Young Kim¹ ; Jin Ah Kim¹ ; Cheal Kim ; ¹ ; ^{chealkim@seoultech.ac.kr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Cobalt ; Zinc ; Colorimetric ; Fluorescence ; Theoretical calculations
• 刊名：Journal of Luminescence
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：179
• 期：Complete
• 页码：602-609
• 全文大小：2100 K

文摘

A new dual chemosensor 1was designed and synthesized. Receptor 1 detected Co²⁺ via color change and Zn²⁺ with turn-on fluorescence in a 1:1stoichiometric system, respectively. The response mechanisms of 1-Co²⁺ and 1-Zn²⁺ complexes have been analyzed using UV–vis spectroscopy, fluorescence titration, ESI-mass spectrometry analysis, NMR titration and DFT calculations. Importantly, the detection limit of 1 for Co²⁺was down to 0.34 μM a near-perfect aqueous solution, which is the lowest one among those previously reported for organic chemosensors for sensing of Co²⁺. 1 was also used to quantify Co²⁺ in real water samples. Therefore, a versatile chemosensor 1 could be a great method for detecting of both Co²⁺ and Zn²⁺