化学
甲醇
检出限
荧光
溶剂
乙醇
丙醇
含水量
分析化学(期刊)
核化学
微量
无机化学
色谱法
有机化学
医学
物理
替代医学
岩土工程
量子力学
病理
工程类
作者
Shuai Zhang,Xiaoyu Fan,Shuhan Jiang,Rentian Guan,Xiaodong Shao,Shuhao Wang,Qiaoli Yue
标识
DOI:10.1016/j.molstruc.2022.134186
摘要
Trace moisture was firstly measured in methanol, ethanol and n-propanol at room temperature. The N, P-codoped carbon dots (CDs) were prepared by one pot solvothermal method, which displayed solvent-dependent fluorescence. The N, P-codoped CDs exhibited green fluorescence, with the quantum yields (QY) of 27.9%, 37.4%, 26.2% and 2.3% in methanol, ethanol, n-propanol and water, respectively. Based on the hydrogen bond interactions between the protic solvents and the N, P-codoped CDs, with the water content increased, the fluorescence intensity of N, P-codoped CDs gradually decreased in methanol, ethanol and n-propanol. The decrement in the fluorescence intensity is linearly related to the water content within the content range of 2% to 8%, 0.04% to 5% and 0.04% to 1.0%, with a limit of detection of 0.22%, 0.009% and 0.021% in methanol, ethanol and n-propanol, respectively. Therefore, the present system has a prospective value for the application in the determination of trace water in the relevant fields.
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