Scholarlink

<p>Silicon quantum dots (SiQDs) function as ratiometric fluorescent sensors for detecting Vitamin B<sub>2</sub> (VB<sub>2</sub>) and Cr<sup>6+</sup>, exhibiting an on-off response. Upon introducing VB<sub>2</sub> to the SiQDs solution, the blue emission peak of SiQDs at 445&#xa0;nm gradually decreases, while the yellow emission peak at 520&#xa0;nm, associated with VB<sub>2</sub>, increases gradually. In the presence of Cr<sup>6+</sup>, both the blue and yellow fluorescence diminish. Through the utilization of Fluorescence Resonance Energy Transfer (FRET), we developed ratiometric fluorescent sensors that displayed specificity and sensitivity in detecting VB<sub>2</sub> and Cr<sup>6+</sup>. The linear detection ranges for VB<sub>2</sub> and Cr<sup>6+</sup> were found to be 0.2 µM to 0.8 µM and 2 µM to 18 µM, respectively. Limit of detection (LOD) was determined to be 1.43 nM for VB<sub>2</sub> and 0.75 µM for Cr<sup>6+</sup> (based on 3&#xa0;s/k, LOD). With a short response time, good selectivity, and resistance to interference, the recovery rate in lake water ranges from 84.8 to 98.0%.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Ratiometric Fluorescence Sensor for On-Off Detection Vitamin B2 and Hexavalent Chromium Based on Silicon Quantum Dots

  • 期刊论文

  • 发表日期：

    2025年3月21日

查看全文
  • Chaofan Jia,
  • Yehao Yan,
  • Fengjiao Zhang,
  • Xinqiu Xu,
  • Hao Li,
  • Jing Zhang,
  • Yin Wei

摘要

Silicon quantum dots (SiQDs) function as ratiometric fluorescent sensors for detecting Vitamin B2 (VB2) and Cr6+, exhibiting an on-off response. Upon introducing VB2 to the SiQDs solution, the blue emission peak of SiQDs at 445 nm gradually decreases, while the yellow emission peak at 520 nm, associated with VB2, increases gradually. In the presence of Cr6+, both the blue and yellow fluorescence diminish. Through the utilization of Fluorescence Resonance Energy Transfer (FRET), we developed ratiometric fluorescent sensors that displayed specificity and sensitivity in detecting VB2 and Cr6+. The linear detection ranges for VB2 and Cr6+ were found to be 0.2 µM to 0.8 µM and 2 µM to 18 µM, respectively. Limit of detection (LOD) was determined to be 1.43 nM for VB2 and 0.75 µM for Cr6+ (based on 3 s/k, LOD). With a short response time, good selectivity, and resistance to interference, the recovery rate in lake water ranges from 84.8 to 98.0%.