高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

新型一氧化氮表面增强拉曼光谱探针

罗春花, 吴朝阳, 沈国励, 俞汝勤   

  1. 湖南大学化学化工学院, 化学生物传感与计量学国家重点实验室, 长沙 410082
  • 收稿日期:2007-05-09 修回日期:1900-01-01 出版日期:2008-01-10 发布日期:2008-01-10
  • 通讯作者: 吴朝阳

Novel Surface-enhanced Resonance Raman Scattering Probe for Nitric Oxide

LUO Chun-Hua, WU Zhao-Yang*, SHEN Guo-Li, YU Ru-Qin   

  1. State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
  • Received:2007-05-09 Revised:1900-01-01 Online:2008-01-10 Published:2008-01-10
  • Contact: WU Zhao-Yang

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被引次数

4

摘要： 合成了一种含邻苯二胺的偶氮染料, 同时邻苯二胺在氧气存在条件下与一氧化氮(NO)反应生成苯并三氮唑结构, 可很好地吸附在纳米银的表面, 产生强表面增强拉曼光谱(SERS), 实现溶液中NO的检测. 实验中考察了染料浓度、纳米银溶胶团聚和溶液pH值等因素的影响. 实验结果表明, 随着NO的加入, 体系的SERS信号在1200~1700 nm之间发生了明显的变化, 其中在1300 nm左右新出现一个很强的峰. 该方法检测灵敏度可达到10-8 mol/L, 且适应的pH值范围在4.5~7.5之间, 符合生理环境要求.

关键词: NO, 苯并三氮唑, 表面增强拉曼光谱

Abstract: A novel diamino-azobenzene dye was designed and synthesized as a Raman indicator for NO. The Raman chemical transformation of the diamino-azobenzene structure is based on the reactivity of diamines with NO in the presence of dioxygen. The N-nitrosation of the diamino-azobenzene, yielding the benzotriazole-based compounds which exhibit a strong propensity to bind to Ag nanoparticles, offers a simple protocol for the direct detection of NO. As the addition of NO, the SERS spectra of the system changed evidently in the range of 1200—1700 nm and turned out a strong SERS peak at 1300 nm. The effects of the concentration of the dye, the aggregation of the nanoparticles and the pH of the solution were evaluated in detail. The result shows that the detection limit of the SERS probe reaches 10-8 mol/L and the system is independent of pH in the range of 4.5—7.5.

Key words: NO, Diamino-azobenzene, Surface-enhanced Raman scattering

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