Biomass carbon dots as a sensitive “on-off” fluorescent probe for Fe(Ⅲ)and promising “on off-on” sensor for antioxidants

机译：生物质碳点作为Fe（Ⅲ）的灵敏“开-关”荧光探针，并有望用于抗氧化剂的“开-关”传感器

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Biomass-based Carbon dots(CDs)have shown great potential in fluorescent sensing and detection of biological or chemical targets because of their photostability and biocompatibility.In this work,value-added CDs with inherent nitrogen-doping were prepared from lignin,an abundant natural biomass waste,in mild condition.Bright blue light emission with fluorescence quantum yield of up to 6.37％was observed with these CDs.We found that the photoluminescence of these CDs could be selectively and instantly quenched(on-off)by Fe(Ⅲ)with a detection limit of 0.66 μM.The quenching behavior followed a linear trend with a Ksv of 7718.7 M-1.Moreover,the quenched fluorescence could be recovered(on-off-on)by the addition of ascorbic acid to the quenching system.An interesting “on-off-on” phenomenon was demonstrated,indicating a promise sensing system for instant detection of antioxidants both quantitatively and qualitatively.

机译：基于生物质的碳点（CD）由于具有光稳定性和生物相容性，因此在荧光传感和生物或化学靶标检测中显示出巨大潜力。本工作中，从木质素中提取了具有固有氮掺杂性的增值CD。这些CD观察到明亮的蓝光发射，荧光量子产率高达6.37％。我们发现这些CD的光致发光可以被Fe（Ⅲ）选择性地并立即猝灭（开-关）。检测限为0.66μM。猝灭行为呈线性趋势，Ksv为7718.7 M-1。此外，可通过在猝灭系统中添加抗坏血酸来恢复猝灭的荧光。演示了一种有趣的“开-关-开”现象，这表明一种用于定量和定性即时检测抗氧化剂的诺言传感系统。

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《第五届制浆造纸新技术国际研讨会（ISETPP）暨第三届国际造纸与环境学术大会（IPEC）论文集》|2016年|1-5|共5页
会议地点 Guangzhou (CN)
作者
Yanpeng Li; Zicheng Liang; Xiaohui Wang; Tongqi Yuan;
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State Kay Laboratory of Pulp and Paper Engineering,South China University of Technology Guangzhou,510640,China;

State Kay Laboratory of Pulp and Paper Engineering,South China University of Technology Guangzhou,510640,China;

State Kay Laboratory of Pulp and Paper Engineering,South China University of Technology Guangzhou,510640,China;

Beijing Key Laboratory of Lignocellulosic Chemistry,Beijing Forestry University,Beijing,100083,China.;

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正文语种 eng
中图分类轻工业、手工业;
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1. A sensitive “ON-OFF” fluorescent probe based on carbon dots for Fe~(2+) detection and cell imaging [J] . Shanshan Wei, Lihong Tan, Xiangyu Yin, The Analyst: The Analytical Journal of the Royal Society of Chemistry: A Monthly International Publication Dealing with All Branches of Analytical Chemistry . 2020,第6期

机译：基于碳点的Fe〜（2+）检测和细胞成像的敏感性“开关”荧光探针
2. Silver nanoparticles capped with carbon dots as a fluorescent probe for the highly sensitive "off-on" sensing of sulfide ions in water [J] . Sinduja B., John S. Abraham Analytical and bioanalytical chemistry . 2019,第12期

机译：银纳米粒子用碳点作为荧光探针，用于高度敏感的“脱落”在水中硫化物离子的感测
3. Branched polyethylenimine-functionalized carbon dots as sensitive and selective fluorescent probes for N-acetylcysteine via an off-on mechanism [J] . Liu Hui, Li Rong Sheng, Zhou Jun, The Analyst: The Analytical Journal of the Royal Society of Chemistry: A Monthly International Publication Dealing with All Branches of Analytical Chemistry . 2017,第22期

机译：支链聚乙烯亚胺 - 官能化的碳点作为N-乙酰半胱氨酸的敏感和选择性荧光探针通过脱机机理
4. Biomass carbon dots as a sensitive “on-off” fluorescent probe for Fe(Ⅲ)and promising “on off-on” sensor for antioxidants [C] . Yanpeng Li, Zicheng Liang, Xiaohui Wang, 制浆造纸新技术国际研讨会 . 2016

机译：生物质碳点作为Fe（Ⅲ）的敏感性“开关”荧光探针，并有前途的抗氧化剂传感器
5. Advances in free radical oxidation: Mechanistic studies, fluorescent probe design and radically different antioxidants [D] . Frenette, Mathieu 2009

机译：自由基氧化的进展：机理研究，荧光探针设计和完全不同的抗氧化剂
6. Nitrogen-doped Carbon Dots Mediated Fluorescent on-off Assay for Rapid and Highly Sensitive Pyrophosphate and Alkaline Phosphatase Detection [O] . Yalei Hu, Xin Geng, Lin Zhang, -1

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7. A Highly Sensitive and Selective “Off-On” Fluorescent Probe for Cu2+ Based on Rhodamine B Hydrazone [O] . Mengmeng Lei, Qihang Zhou, Li Yang, 2020

机译：基于罗丹明B腙的Cu2 +高度敏感和选择性的“脱机”荧光探针

Biomass carbon dots as a sensitive “on-off” fluorescent probe for Fe(Ⅲ)and promising “on off-on” sensor for antioxidants

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