A fluoride-selective colorimetric and fluorescent chemosensor and its use for the design of molecular-scale logic devices

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• 作者：Wei  ; Lu ; Mengyu  ; Zhang ; Keyuan  ; Liu ; Bin  ; Fan ; Zheng  ; Xia ; Liming  ; Jiang  ; ;   ; ^{cejlm@zju.edu.cn}[Author vitae]
• 关键词：Chemosensor ; Colorimetric switch ; Fluorescence ; Fluoride anions ; Logic gates
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2011
• 出版时间：15 December 2011
• 年：2011
• 卷：160
• 期：1
• 页码：1005-1010
• 全文大小：696 K

文摘

A simple and efficient chemosensor 1 was synthesized by reacting thiosemicarbazide with 1-naphthaldehyde. It was found that the sensor is highly selective toward fluoride anions in both UV¨Cvis and fluorescence channels in DMSO solution. Especially, the spectral responses of the sensor along with a visible color change can be switched back and forth by successively adding F^{?/sup> and HSO₄?/sup> anions into the DMSO solution, which may be represented by a complementary ¡°IMPLICATION/INHIBIT?logic gate at molecular level employing both the ions as the chemical inputs. Based on such a reversible and reproducible sensing system, we designed a molecular-scale sequential memory unit displaying ¡°Writing-Reading-Erasing-Reading?and ¡°Multi-write?functions in the form of binary logic.}