Zhao Heng, Ding Haichang, Kang Huimin, Fan Congbin, Liu Gang, Pu Shouzhi
Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University Nanchang Jiangxi 330013 PR China
RSC Adv. 2019 Dec 19;9(72):42155-42162. doi: 10.1039/c9ra08557b. eCollection 2019 Dec 18.
A novel solvent-dependent chemosensor 1o based on a diarylethene containing a rhodamine B unit has been designed. It could be used as a dual-functional chemosensor for selective detection of Hg and Cu by monitoring the changes in the fluorescence and UV-vis spectral in different solvents. A striking fluorescence enhancement at 617 nm was observed in DMSO upon the addition of Hg. However, 1o showed a remarkable absorption band appeared with maximum absorption at 555 nm after the addition of Cu in THF. The results of ESI-MS spectra and Job's plot confirmed a 1 : 1 binding stoichiometry between 1o and the two ions. The limits of detection of Hg and Cu were determined to be 0.14 μM and 0.51 μM, respectively. A 1 : 2 demultiplexer circuit was constructed by using UV light as data input, Cu as the address input, and the absorbance at 555 nm and the absorbance ratio of ( / ) as the dual data outputs.
设计了一种基于含罗丹明B单元的二芳基乙烯的新型溶剂依赖性化学传感器1o。通过监测不同溶剂中荧光和紫外可见光谱的变化，它可用作选择性检测汞和铜的双功能化学传感器。在二甲基亚砜（DMSO）中加入汞后，在617 nm处观察到显著的荧光增强。然而，在四氢呋喃（THF）中加入铜后，1o显示出在555 nm处出现最大吸收的显著吸收带。电喷雾电离质谱（ESI-MS）光谱和乔布氏曲线（Job's plot）结果证实了1o与这两种离子之间的1:1结合化学计量比。汞和铜的检测限分别确定为0.14 μM和0.51 μM。通过使用紫外光作为数据输入、铜作为地址输入以及555 nm处的吸光度和（ / ）的吸光度比作为双数据输出，构建了一个1:2解复用器电路。
