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Mint leaf derived carbon dots for dual analyte detection of Fe(iii) and ascorbic acid

机译：Fe（III）和抗坏血酸的双分析物检测薄荷叶衍生碳点

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摘要

Highly luminescent carbon dots (CDs) are obtained from mint leaves adopting a simple and cost effective route devoid of additional chemical reagents and functionalization. The as-synthesized CDs are characterized by TEM, FE-SEM, XRD analysis, FTIR, Raman, UV-visible and photoluminescence spectral studies. The results reveal that the CDs have an average diameter of 4 nm with a hydroxyl-rich surface. The luminescence of the dots was excitation dependent and was stable towards variation in the medium. The system could perform as a promising on-off-on fluorescent sensor for the selective and sensitive dual analyte recognition of Fe3+ and AA with a detection limit of 374 nM and 79 nM, respectively. The mechanism of ascorbic acid sensing by the CD-Fe3+ unit is established by identifying the binding sites of the biomolecule with the metal ion by examining the behaviour of the sensor in the presence of ascorbic acid derivatives.
机译：从薄荷叶获得高发光的碳点（CDS），采用缺乏额外的化学试剂和官能化的简单且成本效益的途径。 AS合成的CD以TEM，FE-SEM，XRD分析，FTIR，拉曼，紫外线可见和光致发光谱研究为特征。 结果表明，CdS的平均直径为4nm，富羟基表面。 点的发光依赖于激发，并且稳定朝向培养基的变化。 该系统可以作为有前途的接通荧光传感器，用于选择性和敏感的双分析物识别Fe3 +和AA，分别具有374nm和79nm的检测限。 通过在抗坏血酸衍生物存在下通过检查传感器的行为来确定CD-Fe3 +单元通过CD-Fe3 +单元的抗坏血酸感测的机理。

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