Highly selective ratiometric fluorescent Zn²⁺ chemosensor based on diarylethene derivative with bi-8-carboxamidoquinoline unit

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• 作者：Xiaodong Zhang ; Hui Li ; Gang Liu and Shouzhi Pu
• 刊名：Luminescence
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：31
• 期：8
• 页码：1488-1495
• 全文大小：1106K
• ISSN：1522-7243

文摘

An asymmetrical diarylethene (1O) with a bi-8-carboxamidoquinoline unit was synthesized. Its photochromic and fluorescence performances on stimulation with both light and metal ions showed that the diarylethene could serve as a highly selective ratiometric fluorescent chemosensor to detect Zn²⁺ ions based on internal charge transfer and chelation-enhanced fluorescence processes. The diarylethene could selectively discriminate Zn²⁺ from Cd²⁺ in acetonitrile. Furthermore, Job's plots based on fluorescence titration and electrospray ionization mass spectrometry analysis showed 1 : 1 binding stoichiometry between 1O and Zn²⁺. The binding constant of 1O with Zn²⁺, estimated using the Benesi–Hildebrand method, and the limit of detection were 3.37 × 10⁵ M^–1 and 4.6 × 10^–8 mol/L, respectively. Additionally, the light and metal-responsive fluorescence behavior of 1O was used successfully to construct a molecular logic circuit with four inputs and one output. Copyright