Department of Chemistry, Sree Neelakanta Government Sanskrit College (Affiliated to University of Calicut), Pattambi, Kerala, India.
Luminescence. 2023 Apr;38(4):401-409. doi: 10.1002/bio.4459. Epub 2023 Feb 20.
In this piece of work, microwave-assisted conversion of a natural precursor in to high-valued nano-scale material was carried out by a completely greener method. The fluorescent carbon dots prepared, designated as long pepper derived carbon dots (LPCDs), have been thoroughly characterized to explore the physical and chemical properties. The system exhibits excitation dependent emission behavior and from the optimal studies the excitation and emission wavelength of the system was found to be 330 nm and 455 nm respectively. On account of the superior fluorescent behavior of the LPCDs, it was successfully employed as a fluorescent sensing probe to detect Sudan I with good level of selectivity and sensitivity. This carcinogenic dye extensively used as food adulterant can impart several health issues. Food product safety is of high concern, therefore a simple facile and economical analytical method was proposed based on the fluorescence of LPCDs for this dye detection with satisfactory statistical parameters. A linear relationship was maintained in the range of 0 to 27.27 μM Sudan I with limit of detection of 0.92 μM. The quenching mechanism was studied and finally attributed to Förster resonance energy transfer (FRET) mechanism. In addition, the probe was effectively implemented for Sudan I detection in commercial chili powder samples with good level of recovery parameters.
在这项工作中，通过一种完全绿色的方法，利用微波辅助将天然前体转化为高附加值的纳米级材料。所制备的荧光碳点被指定为长胡椒衍生的碳点 (LPCD)，经过彻底的表征来探索其物理和化学性质。该系统表现出激发依赖的发射行为，通过优化研究，确定了该系统的激发和发射波长分别为 330nm 和 455nm。鉴于 LPCD 优异的荧光性能，它被成功用作荧光传感探针，对苏丹红 I 进行检测，具有良好的选择性和灵敏度。这种致癌染料广泛用作食品添加剂，会引发多种健康问题。因此，人们高度关注食品安全，基于 LPCD 的荧光，提出了一种简单、经济、实用的分析方法，用于检测这种染料，具有令人满意的统计参数。在 0 到 27.27 μM 苏丹红 I 的范围内保持线性关系，检测限为 0.92 μM。研究了猝灭机制，最终归因于Förster 共振能量转移 (FRET)机制。此外，该探针还可有效用于商业辣椒粉样品中苏丹红 I 的检测，具有良好的回收率参数。
