School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, People's Republic of China.
J Fluoresc. 2021 Nov;31(6):1863-1869. doi: 10.1007/s10895-021-02816-y. Epub 2021 Sep 15.
A chemical sensor that can induce near-infrared red-shifted response represents a promising strategy for the design and development of anion probes. In this work, novel CH-controlled colorimetric probe 3 based on anthracene carboximide was developed for near-infrared detection of cyanide. Probe 3 consisted of CHCN binding site to anthracene carboximide fluorophore, and showed a significant visual change from yellow-green (535 nm) to deep violet (825 nm) with a larger redshift (≈ 290 nm) and fluorescence quenching at 480 nm and 520 nm upon interacting with cyanide. Job curves determined 1:1 binding stoichiometry of probe 3 with cyanide. Additonally, probe 3 detected cyanide ion conveniently in aqueous solution and could be reused after trifluoroacetic acid treatment. Colorimetric test paper was used to detect cyanide in aqueous solutions. The C-H deprotonation sensing mechanism was confirmed by H NMR titration. The near-infrared detection of cyanide by CH-controlled probes was founded for the first time.
一种能够诱导近红外红移响应的化学传感器代表了设计和开发阴离子探针的一种很有前途的策略。在这项工作中，基于蒽甲酰胺的新型 CH 控制比色探针 3 被开发用于氰化物的近红外检测。探针 3 由 CHCN 结合位点和蒽甲酰胺荧光团组成，与氰化物相互作用时，从黄绿色（535nm）显著变化为深紫色（825nm），红移（≈290nm）较大，在 480nm 和 520nm 处荧光猝灭。Job 曲线确定了探针 3 与氰化物的 1:1 结合计量比。此外，探针 3 可在水溶液中方便地检测氰化物离子，并可在三氟乙酸处理后重复使用。比色试纸用于检测水溶液中的氰化物。通过 H NMR 滴定证实了 C-H 去质子化传感机制。首次发现了 CH 控制探针对氰化物的近红外检测。
