Ma Fang, Sun Mingtai, Zhang Kui, Yu Huan, Wang Zhenyang, Wang Suhua
Department of Chemistry, University of Science & Technology of China, Hefei, Anhui, China; Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui, China.
Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui, China.
Anal Chim Acta. 2015 Jun 16;879:104-10. doi: 10.1016/j.aca.2015.03.040. Epub 2015 Mar 27.
An imidazolethione based turn-on fluorescent probe was synthesized for the detection of hydrogen sulfide, a biologically relevant molecule and an important air pollutant. The probe rapidly and selectively reacted with hydrogen sulfide to produce a strongly fluorescent product, resulting in the fluorescence enhancement of the system. The detection limit was determined to be 30 nM at the probe concentration of 1.0 μM. An indicating paper for visual detection of hydrogen sulfide gas has been fabricated by immobilizing the probe on a piece of appropriate paper substrate, and the detection limit of the visual method reached as low as 0.7 ppm. Moreover, the fluorescence turn-on/off of the system showed good reversibility when exposed alternately to hydrogen sulfide and mercuric ion, which was utilized to make an INHIBIT logic circuit for the presence of the two species.
合成了一种基于咪唑硫酮的荧光开启探针，用于检测硫化氢，硫化氢是一种与生物相关的分子，也是一种重要的空气污染物。该探针能与硫化氢快速、选择性地反应，生成强荧光产物，导致体系荧光增强。在探针浓度为1.0 μM时，检测限为30 nM。通过将探针固定在一片合适的纸质基质上，制备了用于可视化检测硫化氢气体的指示纸，目视法的检测限低至0.7 ppm。此外，当体系交替暴露于硫化氢和汞离子时，荧光开启/关闭表现出良好的可逆性，利用这一特性构建了用于检测这两种物质的抑制逻辑电路。
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