| 二氧化锰纳米颗粒调控的紫外可见吸收-荧光双通道传感器的构建及D-青霉胺的检测 | |
| Construction of MnO2 nanoparticles mediated UV-visible absorption-fluorescence dual channel sensor and detection of D-penicillamine | |
| 摘要: 以聚乙烯亚胺(PEI)同时作为模板和还原剂，基于原位氧化还原反应，一步法制备二氧化锰纳米颗粒(MnO2 NPs)，并对其形貌、组成、紫外可见吸收、催化氧化特性进行了表征。结果表明，MnO2 NPs能够催化氧化邻苯二胺(OPD)为2，3-二氨基吩嗪(DAP)，产生420 nm处的紫外可见吸收和560 nm处的荧光发射。D-青霉胺(DPA)中的活性巯基可与MnO2发生特异性反应，还原降解催化剂，抑制其催化氧化活性，使得体系紫外可见吸收-荧光信号减弱甚至消失。基于DPA浓度与体系光谱信号变化的关系，我们建立了MnO2 NPs介导的紫外可见吸收-荧光双通道传感DPA的新方法。荧光传感通道具有更好的线性范围和灵敏度，该方法线性范围为1~80 μmol·L-1，检出限为0.54 μmol·L-1。此外，MnO2 NPs介导的荧光传感DPA应用于人体尿液样品分析中的回收率为98.31%~107.76%，证明了该方法的可靠性。 | |
| 关键词: 二氧化锰纳米颗粒 紫外可见 荧光 D-青霉胺 | |
| 基金项目: 国家级大学生创新创业训练项目(No.202214101003)、太原工业学院青年学术带头人支持计划(No.2020XS02)和山西省1331项目资助。 | |
| Abstract: In this work,manganese dioxide nanoparticles (MnO2 NPs) were synthesized through a in situ redox reaction using polyethyleneimine (PEI) as both template and reductant.The morphology,composition,UV-visible absorption,and catalytic oxidation performance of MnO2 NPs were characterized.MnO2 NPs possessed the characteristic of catalytic oxidation of o-phenylenediamine (OPD) to 2,3-diaminophenazine (DAP),producing the UV-visible absorption at 420 nm and fluorescence emission at 560 nm.Owing to its active sulfhydryl,D-penicillamine (DPA) could decompose MnO2 NPs through a unique redox reaction.Therefore,the catalytic oxidation activity was inhibited that made UV-visible absorption-fluorescence signals decreased and even disappeared.Based on the relationship between spectral variation and DPA concentration,a MnO2 NPs mediated UV-visible absorption-fluorescence dual channel sensing method for DPA was established.Fluorescence channel sensing possessed satisfactory linear range and sensitivity.The linear range was 1-80 μmol·L-1 with a detection limit of 0.54 μmol·L-1.Moreover,MnO2 NPs mediated fluorescence sensing was applied in human urine sample detection and the recovery was in a range of 98.31%-107.76%,which proved the reliability of this method. | |
| Keywords: MnO2 nanoparticles UV-visible fluorescence D-penicillamine | |
| 投稿时间：2022-08-13 修订日期：2023-02-05 | |
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| 程莹,柳夷冰,赵卉垚,南鑫达,范小青,李生玲,丁莉峰,王琦,牛宇岚.二氧化锰纳米颗粒调控的紫外可见吸收-荧光双通道传感器的构建及D-青霉胺的检测[J].无机化学学报,2023,39(4):617-626. | |
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| Support information: 相关附件： 220371_220371_辅助信息_2023-3-2.doc | |
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