| 对氯硝基苯吸附在银纳米粒子上的偶联反应 |
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| 引用本文： | 苏亚琼,田向东,赵刘斌,吴德印*,田中群.对氯硝基苯吸附在银纳米粒子上的偶联反应[J].物理化学学报,2012,28(12):2767-2773. |
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| 作者姓名： | 苏亚琼 田向东 赵刘斌 吴德印* 田中群 |
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| 作者单位： | State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China |
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| 基金项目： | 国家自然科学基金(20973143, 91027009, 21021002); 国家重点基础研究发展规划项目(973)(2009CB930703)和厦门大学(2010121020)资助 |
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| 摘 要： | 表面增强拉曼光谱(SERS)具有极高的检测灵敏度, 通过检测吸附分子的SERS信号, 可以获得表面吸附分子的结构以及可能发生的反应. 在拉曼激发光源的辐射下, 在碱性溶液中, 银纳米粒子表面吸附的对氯硝基苯(PCNB)的SERS光谱与其固体的常规拉曼光谱相比, 出现异常SERS谱. 通过采用密度泛函理论(DFT)计算, 对PCNB以及可能的偶联产物p,p''-二氯偶氮苯(DCAB)进行理论分析以及谱峰归属, 发现这些异常峰来自其偶联产物DCAB的偶氮C－N＝N－C基团的基频振动.
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| 关 键 词： | 表面增强拉曼光谱 密度泛函理论 对氯硝基苯 p p'-二氯偶氮苯 银纳米粒子 |
| 收稿时间： | 2012-07-25 |
| 修稿时间： | 2012-09-05 |
Reaction of p-Chloronitrobenzene Adsorbed on Silver Nanoparticles |
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| LUO Wen-Li,SU Ya-Qiong,TIAN Xiang-Dong,ZHAO Liu-Bin,WU De-Yin,TIAN Zhong-Qun.Reaction of p-Chloronitrobenzene Adsorbed on Silver Nanoparticles[J].Acta Physico-Chimica Sinica,2012,28(12):2767-2773. |
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| Authors: | LUO Wen-Li SU Ya-Qiong TIAN Xiang-Dong ZHAO Liu-Bin WU De-Yin TIAN Zhong-Qun |
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| Institution: | State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China |
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| Abstract: | Surface-enhanced Raman spectroscopy (SERS) on silver nanoparticles is highly sensitive because of surface plasmon resonance. We have studied the structures and photoinduced chemical reactions of p-chloronitrobenzene (PCNB) molecules adsorbed on silver nanoparticles using a combination of SERS and density functional theory (DFT) calculations. When the PCNB molecules are adsorbed to the surface of silver nanoparticles in alkaline solution, the SERS spectra are very different from the normal Raman spectra of PCNB. Comparison of the DFT simulated Raman spectra of PCNB and p,p''-dichloroazobenzene (DCAB) indicates that the new peaks in the SERS spectrum of PCNB adsorbed on silver nanoparticles arise from the azo (C－N＝N－C) group of DCAB. |
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| Keywords: | Surface-enhanced Raman spectroscopy Density functional theory p-Chloronitrobenzene'' '''') p-Chloronitrobenzene" target="_blank">">p-Chloronitrobenzene p p''-Dichloroazobenzene'' '''') p" target="_blank">">p p''-Dichloroazobenzene Silver nanoparticle |
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