当前位置: X-MOL 学术Spectrochim. Acta. A Mol. Biomol. Spectrosc. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Selective detection of manganese(II) ions based on the fluorescence turn-on response via histidine functionalized carbon quantum dots
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy ( IF 4.4 ) Pub Date : 2022-05-20 , DOI: 10.1016/j.saa.2022.121409
Elham Mohagheghpour 1 , Leila Farzin 1 , Arash Ghoorchian 2 , Sodeh Sadjadi 1 , Majid Abdouss 3
Affiliation  

Herein, water-soluble emissive carbon quantum dots (His-CQDs) were synthesized from pyrolysis of sodium citrate in the presence of histidine under hydrothermal conditions. The as-synthesized His-CQDs were characterized using Fourier transform infrared (FT–IR), fluorescence spectroscopy, dynamic light scattering (DLS), and transmission electron microscopy (TEM) techniques. The obtained His-CQDs display a strong emission peak at 534 nm when excited at 476 nm with a high quantum yield (61.8 %). The as-synthesized His-CQDs were applied as a new platform for highly selective determination of Mn(II) based on the fluorescence “turn-on” response with a limit of detection of 1.85 µg L−1 (at 3σ) and a linear range of 3.50–35.5 µg L−1 in aqueous solution. The sensing mechanism of the His-CQDs probe for the detection of Mn(II) was studied via density functional theory (DFT), FT-IR, and EDTA complexation methodology. In addition, His-CQDs were successfully applied to determine the accurate amounts of Mn(II) in whole blood control material. More importantly, the integrating such an efficient sensor with point-of-care technology can enable portable, easy-to-use, and rapid sensing systems for better biological and clinical applications.



中文翻译:

基于组氨酸功能化碳量子点荧光开启响应的锰(II)离子选择性检测

在此,水溶性发射碳量子点(His-CQDs)是由柠檬酸钠在组氨酸存在下在水热条件下热解合成的。使用傅里叶变换红外 (FT-IR)、荧光光谱、动态光散射 (DLS) 和透射电子显微镜 (TEM) 技术对合成后的 His-CQD 进行表征。获得的 His-CQD 在 476 nm 处激发时在 534 nm 处显示出强发射峰,具有高量子产率 (61.8 %)。所合成的 His-CQD 被用作基于荧光“开启”响应的高选择性测定 Mn(II) 的新平台,检测限为 1.85 µg L -1(在 3σ 处)和线性范围为 3.50–35.5 µg L -1在水溶液中。通过密度泛函理论 (DFT)、FT-IR 和 EDTA 络合方法研究了 His-CQDs 探针检测 Mn(II) 的传感机制。此外,His-CQD 已成功应用于确定全血对照材料中 Mn(II) 的准确量。更重要的是,将这种高效的传感器与即时护理技术相结合,可以实现便携式、易于使用和快速的传感系统,从而实现更好的生物和临床应用。

更新日期:2022-05-24
down
wechat
bug