A novel and sensitive fluorescence analysis platform was constructed for the detection of chlorogenic acid (CGA) using carbon dots (C‐dots) with prominent sensitivity and selectivity. Excitation‐dependent emission fluorescence C‐dots were fabricated using citric acid and l‐histidine as precursors through an efficient one‐step hydrothermal treatment. The maximum excitation and emission wavelength of the as‐synthesized C‐dots were 340 nm and 414 nm, respectively. Moreover, the as‐prepared C‐dots displayed excellent water solubility and good photostability. The fluorescence quantum yield of the as‐prepared C‐dots was measured to be about 22% using quinine sulfate as the reference. Furthermore, the obtained C‐dots were applied to the detection of CGA accompanied with a wide linear range from 1.53 μmol L⁻¹ to 80.0 μmol L⁻¹ as well as a limit detection of 0.46 μmol L⁻¹. More importantly, the proposed fluorescence method was successfully used to analyse CGA in coffee and honeysuckle.

中文翻译：

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碳点的水热合成及其在绿原酸检测中的应用

构建了一个新颖而灵敏的荧光分析平台，用于使用具有显着灵敏度和选择性的碳点（C点）检测绿原酸（CGA）。通过柠檬酸和l-组氨酸作为前体，通过有效的一步式水热处理，制备了依赖于激发的发射荧光C点。合成后的C点的最大激发和发射波长分别为340 nm和414 nm。而且，所制备的碳点显示出优异的水溶性和良好的光稳定性。使用硫酸奎宁作为参比，测得制备的C点的荧光量子产率约为22％。此外，将获得的C点应用于CGA的检测，并具有1.53μmolL的宽线性范围^-1至80.0微摩尔大号^-1以及0.46微摩尔升的极限检测^-1。更重要的是，所提出的荧光方法已成功地用于分析咖啡和金银花中的CGA。