用于同时检测二价和三价铁离子及其形态分析的上转换纳米颗粒/碳点（UCNPs@CDs）复合材料。
Upconversion nanoparticles/carbon dots (UCNPs@CDs) composite for simultaneous detection and speciation of divalent and trivalent iron ions.
作者信息
Sun Yi-Lin, Zhang Xiao-Ping, Zhao Chen-Xi, Liu Xiangju, Shu Yang, Wang Jian-Hua, Liu Nazhen
机构信息
Department of Chemistry, College of Sciences, Northeastern University, Shenyang, 110819, China.
Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China.
出版信息
Anal Chim Acta. 2021 Oct 23;1183:338973. doi: 10.1016/j.aca.2021.338973. Epub 2021 Aug 20.
In this study, the application of carbon dots (CDs) modified NaYF:Yb, Er nanoparticles (UCNPs@CDs) as the fluorescent nanoprobe for simultaneous detection of Fe and Fe was investigated. Fe quantification (5-80 μmol L) was achieved, as a result of Fe induced fluorescence quenching of UCNPs@CDs at 434 nm (under the 336 nm excitation). The chelate (Fe-phen) formed by Fe and 1,10-phenanthroline had a broad absorption centered at 510 nm, due to inner filter effect (IFE), Fe quantification (4-120 μmol L) was achieved as a result of (Fe-phen) induced fluorescence quenching of UCNPs@CDs at 545 nm (under the 980 nm excitation). The resultant UCNPs@CDs probe, with excellent anti-interference capability, favorable fluorescence stability, and convincing performance in real sample analysis, showed promising application in simultaneous detection of Fe and Fe.
在本研究中，对碳点（CDs）修饰的NaYF:Yb、Er纳米颗粒（UCNPs@CDs）作为同时检测Fe²⁺和Fe³⁺的荧光纳米探针的应用进行了研究。由于在336nm激发下，Fe²⁺导致UCNPs@CDs在434nm处的荧光猝灭，实现了Fe²⁺的定量分析（5 - 80μmol·L⁻¹）。Fe³⁺与1,10 - 菲啰啉形成的螯合物（Fe - phen）在510nm处有一个宽吸收峰，由于内滤效应（IFE），在980nm激发下，由于（Fe - phen）导致UCNPs@CDs在545nm处的荧光猝灭，实现了Fe³⁺的定量分析（4 - 120μmol·L⁻¹）。所得的UCNPs@CDs探针具有出色的抗干扰能力、良好的荧光稳定性以及在实际样品分析中令人信服的性能，在同时检测Fe²⁺和Fe³⁺方面显示出有前景的应用。
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