Department of Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran; Faculty of Interdisciplinary Science and Technology, Tarbiat Modares University, Tehran, Iran.
Department of Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran; Faculty of Interdisciplinary Science and Technology, Tarbiat Modares University, Tehran, Iran.
Food Chem. 2020 Oct 30;328:127091. doi: 10.1016/j.foodchem.2020.127091. Epub 2020 May 18.
Methanol is highly toxic for human, so methanol detection is valuable especially in water and ethanol medium without complicated and time consuming procedure. In this work, we present a new fluorescence probe for direct detection of methanol in aqueous and ethanol medium based on the ZnS:Mn quantum dot (QDs) and soluble N-methylpolypyrrole (NMPPy) hybrid. Moreover, the number of spectroscopic techniques were used to study the chemical composition and optical properties of the resultant QDs as well as investigation on the sensing mechanism toward methanol. Also, methanol can be determined by using ZnS:Mn QDs/NMPPy hybrid based switchable fluorescence sensing system, with high sensitivity, high selectivity and a very good detection limit of 1 mM with linearity in the concentration range of 25-230 mM (~0.1-0.9% v/v) in aqueous solution. Finally, the ZnS:Mn QDs/NMPPy hybrid as optical sensor was successfully utilized to determine the amount of methanol in real alcoholic beverage samples.
甲醇对人体有剧毒，因此甲醇检测非常有价值，尤其是在水和乙醇介质中，无需复杂和耗时的程序。在这项工作中，我们提出了一种新的荧光探针，用于在水和乙醇介质中直接检测甲醇，该探针基于 ZnS:Mn 量子点 (QDs) 和可溶性 N-甲基聚吡咯 (NMPPy) 杂化。此外，还使用了多种光谱技术来研究所得 QDs 的化学组成和光学性质，并研究了其对甲醇的传感机制。此外，甲醇可以通过使用 ZnS:Mn QDs/NMPPy 混合的可切换荧光传感系统进行测定，该系统具有高灵敏度、高选择性和非常低的检测限（1 mM），在水溶液中的线性范围为 25-230 mM（~0.1-0.9% v/v）。最后，ZnS:Mn QDs/NMPPy 杂化作为光学传感器成功地用于测定实际酒精饮料样品中的甲醇含量。
