Deep eutectic solvent assisted synthesis of N,Cl co-doped carbon dots using longan shell waste: Applications in antioxidant, anti-inflammatory and Fe2+ detection

化学 抗氧化剂 检出限 核化学 溶剂 选择性 氧化还原 共晶体系 色谱法 无机化学 有机化学 催化作用 合金
作者
Meng Tian,Dandan Wang,Qiuyi Liu,Luchun Wang,Yongqing Tao,Junji Wang,Yuemeng Zou,Yulian Yang,Quan Zhou,Lingling Li,Mingyue Wang,Xiang Li,Die Gao
出处
期刊:Journal of Molecular Liquids [Elsevier BV]
卷期号:397: 124131-124131 被引量:1
标识
DOI:10.1016/j.molliq.2024.124131
摘要

Herein, by using longan shell as a precursor, deep eutectic solvent (DES) which consist of ChCl and urea (molar ration, 1:2) as the solvent and dopant, new CDs (Named as N,Cl-CDs) with good antioxidant and anti-inflammatory activities were synthesized. The chemical studies showed that N,Cl-CDs contained various functional groups (e.g. COOH, OH) and doped with N and Cl. The results of free radical scavenging activity, total antioxidant activity and KMnO4 reduction activity tests showed that N,Cl-CDs had antioxidant properties. The EC50 values were separately determined as 317.26, 302.55 and 20.82 μg/mL, respectively. Because of the good antioxidant activity, N,Cl-CDs also showed redox sensing advantage for oxidants including MnO4−, Fe3+, Cr6+ and H2O2. Moreover, the classic mouse ear edema inflammation model was further employed to explore the anti-inflammatory activity of N,Cl-CDs. Compared with the normal saline (NS) gup (67.80 %), N,Cl-CDs at high dose (1.40 mg/kg) significantly reduced the percentages of inflammation (38.13 %). Besides, due to the internal filtration effect (IFE) and static quenching, N,Cl-CDs also showed good sensitivity and selectivity for Fe2+, the limit of detection (LOD) of Fe2+ was 0.3 μM. Finally, the detection of the Fe2+ in water sample was done to test the practical application value of N,Cl-CDs, and the as-developed method showed satisfactory recoveries (92.92 %–111.03 %).
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