发光学报2018，Vol.39Issue(4)：600-607,8.DOI:10.3788/fgxb20183904.0600
红枣碳量子点“关-开”型荧光探针检测芦丁的研究
Synthesized of Carbon Quantum Dots from Red Dates and as A"Off-On"Fluorescence Probe for High Sensitive Detection of Rutin
摘要
Abstract
A one-step hydrothermal method was developed for the preparation of carbon quantum dots(CQDs) with strong fluorescence by using red dates as precursors. The luminescence properties of the CQDs were studied by fluorescence spectroscopy,UV-Vis spectrum,transmission electron mi-croscopy,infrared spectrum,X-ray powder diffraction spectroscopy. In pH=4.00 NaAc-HAc buffer solution,after potassium permanganate(KMnO4) was added in CQDs solution, the fluorescence of CQDs was quenched,and the fluorescence signal of the system was in the"off"state. In the pres-ence of rutin,the fluorescence of CQDs was recovered because KMnO4 preferred to react with rutin, which results in the departure of KMnO4 from the surface of the CQDs,and the fluorescence signal of the system was"open". The degree of recovery of CQDs fluorescence intensity was proportional to the rutin concentration,which provided a new method for the detection of rutin with high sensitivity and selectivity based on the fluorescence quenching-recovery properties of CQDs. The mechanism of fluorescence quenching of CQDs by KMnO4 was studied,and the reaction conditions were optimized. Under optimal conditions,the recovered fluorescence of CQDs is linearly related with the rutin con-centration in the range 2.5 ×10 -7-1.0 ×10 -5 mol/L, the detection limit is 1.5 ×10 -7 mol/L.The present method is applied for the detection of rutin in samples with satisfactory results.关键词
碳量子点/荧光探针/芦丁/高锰酸钾/红枣Key words
carbon quantum dots/fluorescence probe/rutin/potassium permanganate/red dates分类
化学化工引用本文复制引用
王靖原,张越诚,马红燕,刘晓莉,王琦..红枣碳量子点“关-开”型荧光探针检测芦丁的研究[J].发光学报,2018,39(4):600-607,8.基金项目
陕西省自然科学基础研究计划(2014JM2056) （2014JM2056）
延安大学研究生科研创新项目资助Supported by Natural Science Basic Research Program of Shaanxi Province(2014JM2056) （2014JM2056）
Foundation of Graduate Scientific Re-search Innovation Project of Yan'an University （）
