Dye-sensitized core-shell NaGdF4:Yb,Er@NaGdF4:Yb,Nd upconversion nanoprobe for determination of H2S
Dye-sensitized core-shell NaGdF4:Yb,Er@NaGdF4:Yb,Nd upconversion nanoprobe for determination of H2S
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DOI：
10.1016/j.saa.2020.119281
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发表时间：
2021-03-05
影响因子：
4.4
通讯作者：
Wang, Lun
中科院分区：
文献类型：
--
作者：
Chen, Hongqi;Wang, Wen;Wang, Lun
采用共沉淀法成功制备了核壳结构的NaGdF 4：Yb，Er@NaGdF4：Yb，Nd上转换纳米粒子（UCNPs），并通过NOBF 4与纳米粒子之间的配体交换反应改善了UCNPs的水溶性。具有负电荷的IR-783染料和具有正电荷的NOBF 4-UCNP可以通过静电作用结合在一起，以通过从IR-783到UCNP的能量转移来敏化UCNP。然而，在Na 2S（一种常用的H2S供体）存在下，H2S与IR-783发生了高度选择性的反应，破坏了IR-783的结构，阻断了能量传递，导致了IR-783的发光强度猝灭。在此基础上，成功地构建了一套H_2S的传感检测系统。该系统检测H_2S的线性范围为0.5-15 μ M，检测限为34.17 nM。将染料敏化核壳结构NaGdF 4：Yb，Er@NaGdF4：Yb，Nd上转换纳米探针应用于真实的样品分析，获得了满意的结果。(C)2020 Elsevier B. V.保留所有权利。
The core-shell NaGdF4:Yb,Er@NaGdF4:Yb,Nd upconversion nanoparticles (UCNPs) were successfully obtained with the method of co-precipitation, and the water-solubility of UCNPs was improved by the ligand exchange reaction between nitrosyl tetrafluoroborate (NOBF4) and nanoparticles. The IR-783 dye with negative charge and NOBF4-UCNPs with positive charge can bind together by electrostatic action to sensitize UCNPs through the energy transfer from IR-783 to UCNPs. However, with the presence of Na2S (a commonly used H2S donor), a highly selective reaction between H2S and IR-783, which destoried the structure of IR-783 and blocked the energy transfer, thus led to the quenching of luminescent intensity. Based on this, a sensing system for determination of H2S has been constructed successfully. The linear range of H2S detection by this system is 0.5-15 mu M, and the detection limit is 34.17 nM. Furthermore, the dye-sensitized core-shell NaGdF4:Yb,Er@NaGdF4:Yb,Nd upconversion nanoprobe was applied to real sample analysis with satisfactory results. (C) 2020 Elsevier B.V. All rights reserved.