Ascertaining p,p '-dimercaptoazobenzene produced from p-aminothiophenol by selective catalytic coupling reaction on silver nanoparticles
文献类型：期刊论文
| 作者 | Fang, Yurui1; Li, Yuanzuo1; Xu, Hongxing1,2; Sun, Mengtao1 |
| 刊名 | Langmuir
 |
| 出版日期 | 2010-06-01 |
| 卷号 | 26期号:11页码:7737-7746 |
| ISSN号 | 0743-7463 |
| DOI | 10.1021/la904479q |
| 通讯作者 | Sun, mengtao(mtsun@aphy.iphy.ac.cn) |
| 英文摘要 | Combining experiment and theory, evidence from surface-enhanced raman scattering (sers) were obtained for p,p'-dimercaptoazobenzene (dmab) produced from p-aminothiophenol (patp) by selective catalytic coupling reaction on silver nanoparticles. the time-dependent sers spectra of pate are consistent with the calculated sers spectra of dmab), which is the direct evidence or the production of dmab from pate by selective catalytic coupling reaction on silver nanoparticles. the so-called "b(2) modes" of patp is the -n=n- related vibrational modes of dmab. the silver nanoparticles could be assembled together to form different size of aggregates with different concentration of pate solution. when the concentration of ag nanoparticle (the radius 40 nm) in colloid is 35 pm, the time-dependent sers of dma b reveals that the better experimental conditions for observing sers signals of dma b are (1) concentration of pate is around 5 x 0(-6) m in which condition the aggregates consist with about 3-5 silver nanoparticles. which are not too big and suitable for sers measurement, and (2) the raman signal will be strongest at the thne delay about 27 min for this concentration. by analyzing the symmetry of strong enhanced vibrational modes, it is derived that all ask strong vibrational modes are mostly enhanced by surface plasmons (electromagnetic field). the sers enhancement calculated with finite-difference time-domain method is on the order of |m|(4) = 9.0 x 10(8) in junctions of agnps at 632.8 nm, where |m|(4) = e-loc/e-in and e-loc and e-in are local and incident electric fields, respectively. the total chemical enhancements, including static chemical and resonant enhancements, are on the order of 10(3). |
| WOS关键词 | SURFACE-ENHANCED RAMAN ; CHARGE-TRANSFER ; SCATTERING ; SPECTROSCOPY ; GOLD ; MOLECULES ; ELECTRODE ; SPECTRA ; SERS ; MECHANISMS |
| WOS研究方向 | Chemistry ; Materials Science |
| WOS类目 | Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000277928100016 |
| 出版者 | AMER CHEMICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2373738 |
| 专题 | 物理研究所 |
| 通讯作者 | Sun, Mengtao |
| 作者单位 | 1.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China 2.Lund Univ, Div Solid State Phys, S-22100 Lund, Sweden |
| 推荐引用方式 GB/T 7714 | Fang, Yurui,Li, Yuanzuo,Xu, Hongxing,et al. Ascertaining p,p '-dimercaptoazobenzene produced from p-aminothiophenol by selective catalytic coupling reaction on silver nanoparticles[J]. Langmuir,2010,26(11):7737-7746. |
| APA | Fang, Yurui,Li, Yuanzuo,Xu, Hongxing,&Sun, Mengtao.(2010).Ascertaining p,p '-dimercaptoazobenzene produced from p-aminothiophenol by selective catalytic coupling reaction on silver nanoparticles.Langmuir,26(11),7737-7746. |
| MLA | Fang, Yurui,et al."Ascertaining p,p '-dimercaptoazobenzene produced from p-aminothiophenol by selective catalytic coupling reaction on silver nanoparticles".Langmuir 26.11(2010):7737-7746. |
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