A composite prepared from gold nanoparticles and a metal organic framework (type MOF-74) for determination of 4-nitrothiophenol by surface-enhanced Raman spectroscopy
A composite prepared from gold nanoparticles and a metal organic framework (type MOF-74) for determination of 4-nitrothiophenol by surface-enhanced Raman spectroscopy
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由金纳米粒子和金属有机骨架（MOF-74型）制备的复合材料，用于通过表面增强拉曼光谱测定4-硝基苯硫酚
DOI：
10.1007/s00604-019-3618-z
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发表时间：
2019-07-01
影响因子：
5.7
通讯作者：
Zhang, Runkun
中科院分区：
文献类型：
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作者：
Zhang, Yanshu;Hu, Yufei;Zhang, Runkun
采用一锅法合成了由金核和金属有机骨架壳(MOF-74型)组成的核-壳纳米粒子。该纳米粒子对4-硝基苯酚具有较高的灵敏度和稳定的表面增强拉曼光谱活性，在1337 cm−-1处有一特定的谱带。该方法在0.10-10μ·L−-1浓度范围内具有良好的线性关系，检测下限为69 nmol·L−-1。第一种方法是在不添加常规酸催化剂的情况下，对表面等离子体诱导的芳环硝化反应进行SERS原位监测。第二个研究是在785 nm激光照射下，Au/MOF-74催化4-硝基苯酚还原为4-硫代氨基苯酚。等离子体辅助4-硝基苯酚二聚生成4，4‘-二硫代偶氮苯的过程也可以被同时监测。图形摘要以金核和MOF-74壳层组成的纳米SERS底物的示意图，将其应用于4-硝基苯酚的检测。Au/MOF-74被成功地用于SERS原位监测两个含4-硝基硫酚的模型反应。
Core-shell nanoparticles (NPs) consisting of a gold core and a metal-organic framework shell (type MOF-74) were synthesized via one-pot synthesis. The NPs exhibit highly sensitive and stable SERS activity for the detection of 4-nitrothiophenol, with a specific band at 1337 cm−1. The method has a linear response in 0.10–10 μmol·L−1analyte concentration range and a lower detection limit of 69 nmol·L−1. The potential application of this novel SERS substrate was evaluated by two model reactions involving 4-nitrothiophenol. The first involves in-situ SERS monitoring of the surface plasmon-induced nitration of aromatic rings without adding conventional acid catalyst. The second involves the photocatalytic reduction of 4-nitrothiophenol to 4-thioaminophenol in the presence of Au/MOF-74 under 785-nm laser irradiation. The plasmon-assisted dimerization of 4-nitrothiophenol to form 4,4′-dimercaptoazobenzene can also be monitored simultaneously.Graphical abstractSchematic presentation of a nanoparticle SERS substrate consisting of gold core and MOF-74 shell, which was applied to detection of 4-nitrothiophenol. The Au/MOF-74 was successfully used for in-situ monitoring of two model reactions involving 4-nitrothiophenol by SERS.