基于枸杞为原料的碳量子点制备及作为荧光探针高灵敏检测D-青霉胺
发布时间:2019-04-28 12:17
【摘要】:以枸杞为原料,一步水热法制备得到具有强烈荧光的碳量子点(CQDs),并基于Cu(Ⅱ)与CQDs形成无辐射复合体,构建了"关-开"型荧光探针用于D-青霉胺(D-PA)的选择性高灵敏检测.在CQDs溶液中加入Cu(Ⅱ)离子后,CQDs的荧光发生淬灭,体系的荧光信号处于"关闭"状态.在D-PA存在下,由于D-PA与Cu(Ⅱ)具有更强的结合力,形成比CQDs-Cu(Ⅱ)复合体更稳定的络合物,将Cu(Ⅱ)从CQDs表面移除下来,使CQDs的荧光得到恢复,体系的荧光信号呈"打开"状态.实验探讨了Cu(Ⅱ)对CQDs荧光淬灭的机理,考察了各种反应条件.在优化的条件下,CQDs探针的荧光恢复程度与D-PA的浓度在0.5~80μmol L~(-1)范围呈良好的线性关系,检出限为0.15μmol L~(-1).应用于人血清中D-PA的检测,回收率为96.7%~105.0%,相对标准偏差小于3.1%,表明该法可应用于人体内D-青霉胺药物的检测和药代动力学研究.
[Abstract]:Using Lycium barbarum as raw material, the carbon quantum dot (CQDs), with strong fluorescence was synthesized by one-step hydrothermal method, and the radiation-free complex was formed based on Cu (鈪,
本文编号:2467622
[Abstract]:Using Lycium barbarum as raw material, the carbon quantum dot (CQDs), with strong fluorescence was synthesized by one-step hydrothermal method, and the radiation-free complex was formed based on Cu (鈪,
本文编号:2467622
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