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Synthesis of N, Zn-doped carbon dots for the detection of Fe3+ ions and bactericidal activity against Escherichia coli and Staphylococcus aureus.
Journal of Photochemistry and Photobiology B: Biology ( IF 3.9 ) Pub Date : 2019-12-06 , DOI: 10.1016/j.jphotobiol.2019.111734 Sai Kumar Tammina 1 , Yang Wan 2 , Yanyan Li 1 , Yaling Yang 1
Journal of Photochemistry and Photobiology B: Biology ( IF 3.9 ) Pub Date : 2019-12-06 , DOI: 10.1016/j.jphotobiol.2019.111734 Sai Kumar Tammina 1 , Yang Wan 2 , Yanyan Li 1 , Yaling Yang 1
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A simple and one-step microwave digestion method was utilized to synthesize the highly photoluminescent glucosamine derived nitrogen and zinc doped carbon dots (N, Zn-CDs) with a bluish-green luminescence property. The synthesized N, Zn-CDs inherited a good photoluminescence property with a quantum yield of 74% and which were characterized by XPS, XRD, TEM, FT-IR, UV-Vis, and fluorescence spectrometry. More importantly, N, Zn-CDs served as a fluorescence sensor for the detection of Fe3+ ions, under optimal conditions, a good linear relationship was established in the concentration range of 0.25-125 μM. Also, the experimental results showed the detection limit of N, Zn-CDs against Fe3+ was 0.15 μM, this could be a promising assay for sensing Fe3+ ions. Also, the role of zinc doping was explored by conducting the detection under similar experimental conditions in the absence of zinc, and reports revealed that the reason for high photoluminescence was due to the zinc doping. Along with the sensing application, our group had investigated the bactericidal property of synthesized N, Zn-CDs against gram-negative (Escherichia coli), and gram-positive pathogens (Staphylococcus aureus). N, Zn-CDs displayed good bactericidal activity against both pathogens under light conditions, but Escherichia coli, even under the dark condition proved its activity. Besides, the morphology of both the strains was displayed before and after the treatment via a scanning electron microscopic images. Also, a plausible mechanism for bactericidal activity was also explained. The reported synthesis method could provide a novel approach for the design of high photoluminescent N, Zn-CDs with good sensing and bactericidal property towards Fe3+ ions, gram-negative and positive bacterial strains.
中文翻译：
N，Zn掺杂的碳点的合成，用于检测Fe3 +离子和对大肠杆菌和金黄色葡萄球菌的杀菌活性。
利用一种简单的一步微波消解方法来合成具有蓝绿色发光特性的高光致发光葡糖胺衍生的氮和锌掺杂碳点（N，Zn-CDs）。合成的N，Zn-CDs继承了良好的光致发光特性，量子产率为74％，并通过XPS，XRD，TEM，FT-IR，UV-Vis和荧光光谱进行了表征。更重要的是，N，Zn-CDs用作检测Fe3 +离子的荧光传感器，在最佳条件下，在0.25-125μM的浓度范围内建立了良好的线性关系。实验结果还表明，N，Zn-CDs对Fe3 +的检出限为0.15μM，这可能是一种有前途的检测Fe3 +离子的检测方法。还，通过在不存在锌的情况下在相似的实验条件下进行检测来探索锌掺杂的作用，并且报告显示高光致发光的原因是由于锌掺杂。随着传感技术的应用，我们小组研究了合成的N，Zn-CDs对革兰氏阴性菌（大肠杆菌）和革兰氏阳性病原体（金黄色葡萄球菌）的杀菌性能。N，Zn-CDs在明亮的条件下对两种病原体均显示出良好的杀菌活性，但即使在黑暗条件下，大肠杆菌也证明了其活性。此外，通过扫描电子显微镜图像显示了在处理之前和之后两种菌株的形态。另外，还解释了可行的杀菌活性机理。
更新日期：2019-12-07
中文翻译：
N，Zn掺杂的碳点的合成，用于检测Fe3 +离子和对大肠杆菌和金黄色葡萄球菌的杀菌活性。
利用一种简单的一步微波消解方法来合成具有蓝绿色发光特性的高光致发光葡糖胺衍生的氮和锌掺杂碳点（N，Zn-CDs）。合成的N，Zn-CDs继承了良好的光致发光特性，量子产率为74％，并通过XPS，XRD，TEM，FT-IR，UV-Vis和荧光光谱进行了表征。更重要的是，N，Zn-CDs用作检测Fe3 +离子的荧光传感器，在最佳条件下，在0.25-125μM的浓度范围内建立了良好的线性关系。实验结果还表明，N，Zn-CDs对Fe3 +的检出限为0.15μM，这可能是一种有前途的检测Fe3 +离子的检测方法。还，通过在不存在锌的情况下在相似的实验条件下进行检测来探索锌掺杂的作用，并且报告显示高光致发光的原因是由于锌掺杂。随着传感技术的应用，我们小组研究了合成的N，Zn-CDs对革兰氏阴性菌（大肠杆菌）和革兰氏阳性病原体（金黄色葡萄球菌）的杀菌性能。N，Zn-CDs在明亮的条件下对两种病原体均显示出良好的杀菌活性，但即使在黑暗条件下，大肠杆菌也证明了其活性。此外，通过扫描电子显微镜图像显示了在处理之前和之后两种菌株的形态。另外，还解释了可行的杀菌活性机理。
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