| 彭梦姣,李婧,贺娟妮,何鑫,万伟东.化学通报,2026,89(9):1178-1184,1177. |
| 一种新型近红外比率型CN-荧光探针的合成及性质研究 |
| Synthesis and Properties of a Novel NIR Ratiometric Fluorescent Probe for CN- Detection |
| 投稿时间：2026-03-19 修订日期：2026-04-25 |
| DOI： |
| 中文关键词: 近红外区 比率型 比色型 氰根离子检测 荧光探针 |
| 英文关键词:near-infrared region, ratiometric, colorimetric, cyanide detection, fluorescent probe |
| 基金项目:陕西省教育厅重点科学研究计划项目(25JR015)和富硒农产品废弃物资源化利用陕西省高校工程研究中心项目资助 |
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| 中文摘要: |
| 本文合成了一种用于检测氰根离子的新型近红外比率型和比色型的荧光探针RFS。RFS以同时含有罗丹明和荧光素结构特征的杂化分子作为荧光团，兼具了二者的优点，包括良好的水溶性和较好的光学性质。氰根离子具有强亲核性，能够进攻识别基团半花菁中极化的碳氮双键，从而达到识别效果。该反应能够阻断π键共轭结构和ICT效应，进而引起双波长的荧光强度和紫外可见吸收光谱变化。比率型的荧光变化分别在570 nm与675 nm处，比色型变化则表现为颜色从紫色变为粉色。由于半花菁基团的加入，探针的共轭体系继续扩大，荧光发射波长甚至可以红移至675 nm，属于近红外区。探针RFS提供了一种能在复杂水相体系中检测氰根离子的方法，其比色型的特点还提供了一种不借助仪器仅凭裸眼观察即可达到检测目的的潜力。 |
| 英文摘要: |
| A novel NIR ratiometric and colorimetric fluorescent probe RFS has been synthesized for cyanide detection. RFS employs a hybrid molecule possessing both rhodamine and fluorescein structural characteristics as fluorophore, which combines the advantages of both, including good water solubility and good optical properties. The detection of cyanide was performed via the nucleophilic attack of cyanide anion toward the polarized carbon nitrogen double bond of the recognition unit hemicyanine. This resulted in the blockage of the π-conjugated structure and ICT effect, which consequently caused variations in the dual-wavelength fluorescence and UV-Vis absorption. Thus ratiometric fluorescent change occurred at 570 and 675 nm, colorimetric change was characterized by a color shift from purple to pink. With the incorporation of recognition unit hemicyanine, the conjugation system is further extended. This results in the fluorescence emission wavelength of RFS red-shifted to 675 nm, which belongs to the near-infrared region. RFS provides a method for detecting cyanide ions in complex aqueous systems, and its colorimetric signal also enables the potential for instrument-free, visual detection through naked-eye observation. |
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