Fluorescent Sensing of both Fe(III) and pH Based on 4-Phenyl-2-(2-Pyridyl)Thiazole and Construction of OR Logic Function
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- 作者：Ming-Yang Yang ; Xiao-Long Zhao ; Ming-Hua Zheng ; Yue Wang…
- 刊名：Journal of Fluorescence
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：26
- 期：5
- 页码：1653-1657
- 全文大小：581 KB
- 刊物类别：Biomedical and Life Sciences
- 刊物主题：Biomedicine
Biomedicine
Biophysics and Biomedical Physics
Biotechnology
Biochemistry
Analytical Chemistry - 出版者：Springer Netherlands
- ISSN：1573-4994
- 卷排序：26
文摘
In the presented paper we investigated a 2-pyridylthiazole derivative, 4-phenyl-2-(2-pyridyl)thiazole (2-PTP), as the molecular fluorescent switches. It was firstly found that 2-PTP could perform a “turn-on” fluorescent sensing for Fe(III) with selectivity and reversibility. A 2:1 stoichiometry between 2-PTP and Fe(III) was determined according to the molar ratio method. The binding constant was evaluated as (1.90 ± 0.05) × 105 (L/mol)2. The detection limit was found as 2.2 × 10−7 M (S/N = 3). Secondly, 2-PTP also exhibited a pH-dependent dual-emission. The pKa(2-PTP-H+/2-PTP) value was then estimated as 2.0. To explain the identical emission at 479 nm of both the Fe(III) coordinated form and the protonated form of the ligand, we proposed a “locked” conformation. Finally, combining the two external stimuli as inputs, an OR logic gate was constructed using the fluorescent emission at 479 nm as the output channel.KeywordsFluorescenceFe(III)pH2-pyridylthiazoleOR logic gate