染料分子SERS与FTIR－Raman的比较研究

本文研究了强荧光染料罗丹明Ｂ（ＲｈＢ）的表面增强拉曼（ＳＥＲＳ）和傅里叶变换红外拉曼（ＦＴＩＲ－Ｒａｍａｎ）光谱，比较了这两种技术在研究荧光物质拉曼效应方面各自的特点和优势，并对两种方法获得的振动模式的差异及ＲｈＢ在银表面的吸附方式进行了讨论。     

氯化钾对银胶中碱性品红表面增强拉曼散射的影响

测量了银胶中碱性品红的表面增强拉曼散射（ＳＥＲＳ）光谱。系统考察了不同波长光激发下ＫＣｌ对碱性品红ＳＥＲＳ光谱的影响，给出了不同波长光激发下碱怀品红的１３６６ｃｍ＾－１和２４２ｃｍ＾－１峰相对强度随ＫＣｌ量（或浓度对数值）的变化曲线，５１４．５ｎｍ和６３２．８ｎｍ光激发的碱性品红的ＳＥＲＳ谱有明显差异，２４２ｃｍ＾－１峰与其他峰的相对强度发生变化。     

吡啶－碘电子转移复合物的表面增强拉曼光谱（SERS）研究

吡啶－碘电子转移复合物的表面增强拉曼光谱（ＳＥＲＳ）研究马树国，吴国祯（清华大学物理系北京１０００８４）ＴｈｅＳｕｒｆａｃｅＥｎｈａｎｃｅｄＲａｍａｎＳｔｕｄｙｏｆＴｈｅｃｈａｒｇｅＴｒａｎｓｆｅｒＣｏｍｐｌｅｘｏｆＰｙｒｉｄｉｎｅ－Ｉｏｄｉｎｅｏｎ...     

席夫碱化合物的SERS与NIR FT-Raman比较研究

席夫碱化合物的ＳＥＲＳ与ＮＩＲＦＴ┐Ｒａｍａｎ比较研究叶勇胡继明郁鉴源＊周群＊曾云鹗（武汉大学分析测试科学系武汉４３００７２）＊（清华大学分析中心北京１０００８４）ＳＥＲＳａｎｄＦＴ┐ＲａｍａｎＳｐｅｃｔｒｏｓｃｏｐｉｃＳｔｕｄｙｏｆＳｃｈｉｆＢａｓ...     

大豆甙元成分的TLC—SERS研究

利用高效薄层色谱（ＴＬＣ）分离技术和表面增强拉曼散射技术（ＳＥＲＳ）的结合，获得了分析大豆甙元成分的新方法，ＳＥＲＳ结果表明，在ＴＬＣ原位的３μｇ样品就可获得大豆甙元的主要振动特征谱带，通过表面增强光谱揭示出，ＳＥＲＳ与固体光谱的异同，并指明了大豆甙元与银溶胶的吸附模式，ＴＬＣ－ＳＥＲＳ使高效分离与指纹性鉴定结合，可对化学成分进行高灵敏度的检测。     

应用TLC—FT—SERS对萝芙木中利血平成分的研究

本文报道了应用薄层色谱（ＴＬＣ）与傅里叶变换表面增强拉曼光谱（ＦＴ－ＳＥＲＳ）联用技术,获得了中草药萝芙木有效成分利血平光谱研究的新方法。研究表明：在薄层原位约２μｇ的样品即可获得利血平分子的特征振动谱带,并阐述了样品分子在表面增强基底银微粒表面的吸附模式,从而说明ＴＬＣ－ＳＥＲＳ结合对中草药化学成分进行高灵敏度指纹检测的可靠性和优越性。     

YBa_2Cu_3O_(7-δ)高温超导膜的Raman标定

ＹＢａ２Ｃｕ３Ｏ７－δ高温超导膜的Ｒａｍａｎ标定张鹏翔１，２，Ｈ．－Ｕ．ＨＡＢＥＲＭＥＩＥＲ２，Ｍ．Ｃａｒｄｏｎａ２（１云南工业大学材料科学与工程系昆明云南６５００５１中国）（２Ｍａｘ－Ｐｌａｕｄ－ＩｎｓｔｉｔｕｔｆüｒＦｅｓｔｋｏｒｐｅｒｆｏｒｓｃ...     

量子拍频系统的拉曼散射

量子拍频系统的拉曼散射曹卓良，朱克荣，赵华正（安徽大学物理系合肥２３００３９）ＲａｍａｎＳｃａｔｔｅｒｉｎｇＥｆｆｅｃｔｏｆＡＱｕａｎｔｕｍ－ｂｅａｔＡｔｏｍｉｃＳｙｓｔｅｍ￥ＣａｏＸｈｕｏｌｉａｎｇ；ＺｈｕＫｅｒｏｎｇａｎｄＺｈａｏＨｕａｚｈｅｎｇ...     

马尾松毛虫核型多角体病毒粒子的SERS谱研究

获得并研究了马尾松毛虫核型多角体病毒粒子在银胶中的表面增强拉曼散射（ＳＥＲＳ）谱。ＳＥＲＳ谱的增强特性与ｐＨ值有关，其ＳＥＲＳ谱在ｐＨ＝８时获得了最好的增强，该粒子是通过其衣壳蛋白的ＣＯＯ和ＮＨ２基因吸附的银表面上，色氨酸（Ｔｒｐ）和酪氨酸（Ｔｙｒ）残基侧链远离银表面，酰胺Ｉ和酰胺Ⅲ的光谱带在ＳＥＲＳ谱中未出现，增强机制以化学增强为主。     

脂类和极性氨基酸的近红外表面增强拉曼散射研究

脂类和极性氨基酸的近红外表面增强拉曼散射研究张崇起，李勤，林书煌（首都师范大学物理系综合所北京１０００３７）ＴｈｅＮＩＲ－ＦＴ－ＳＥＲＳｏｆＡｒｏｍａｔｉｃａｎｄＵｎｃｈｒｇｅｄｐｏｌａｒＡｍｉｎｏＡｃｉｄＡｄｓｏｒｂｅｄｂｙＳｉｌｖｅｒＣｏｌｌｏｉ...     

胆红素络合物的表面增强拉曼光谱研究

本文通过对近红外激发傅里叶变换拉曼光谱(NIR-FT-Raman)与表面增强拉曼散射(Surface Enhanced Raman Scattering,SERS)技术的联用,测得胆红素及其络合物Na     

Adsorption of 1,2,4‐triazole on a silver electrode: surface‐enhanced Raman spectroscopy and density functional theory studies

The pH‐dependent surface‐enhanced Raman scattering (SERS) of 1,2,4‐triazole adsorbed on silver electrode and normal Raman (NR) spectra of this compound in the aqueous solutions were investigated. The observed bands in the NR and SERS spectra were assigned with the help of density functional theory calculations for model molecules in the neutral, anionic, and cationic forms and their complexes with silver. The Raman wavenumbers and intensities were computed at the optimized molecular geometry. Vibrational assignments of the SERS and NR spectra are provided by calculated potential energy distributions. The combination of experimental SERS results and density functional theory calculations provide an insight into the molecular structure of adlayers formed by 1,2,4‐triazole on a silver surface at varying pH values and enable the determination of molecular orientation with respect to the surface. Copyright © 2012 John Wiley & Sons, Ltd.     

金纳米粒子掺杂DNA-CTMA-DPFP薄膜的表面增强拉曼散射特性

采用柠檬酸三钠还原氯金酸和离子交换法制备金纳米粒子掺杂DNA-CTMA材料,利用钯催化反应合成9,9-二乙基-2,7-二-(4-吡啶)芴荧光染料(DPFP),将DPFP与DNA-CTMA混合后,旋凃制备金纳米粒子掺杂的DNA-CTMA-DPFP薄膜样品。通过吸收光谱、荧光光谱和拉曼光谱的测量,研究了薄膜样品的光学特性和表面增强拉曼散射(SERS)特性。实验结果表明,薄膜样品在300～360 nm的吸收主要来自DPFP,在500～700 nm的吸收来自样品中金纳米粒子的局域表面等离子共振;样品在370,386,408 nm处的荧光峰分别对应DPFP的S₁₀-S₀₀、S₁₀-S₀₁和S₁₀-S₀₂能级的电子振动跃迁;在785 nm激光激发下,薄膜样品的拉曼散射主要来自DPFP分子,随着金纳米粒子掺杂比的增大,DPFP分子的拉曼散射峰强度逐渐增强。因此,金纳米粒子掺杂DNA-CTMA薄膜适合作为多种染料分子的SERS基底。     

Metal–organic frameworks: a novel SERS substrate

We report the direct observation of surface‐enhanced Raman scattering (SERS) effect using metal–organic frameworks (MOFs) as substrates. Without the aid of any metal colloids or enhancing agents, the SERS signals of methyl orange (MO) adsorbed in MOFs were observed and even remained active if the organic linkers in MOFs were completely removed by high temperature and O₂ plasma treatments. It implies that the SERS active site is at the metal oxide clusters. The ultraviolet‐visible spectra of MO, MOFs, and MO–MOF complexes show that absorption peaks are far from laser excitation line. Thus, conventional resonance enhancement effect should be ruled out, and charge‐transfer mechanism is the most likely scenario responsible for the observed SERS effect. Density functional theory (DFT) was used to interpret the chemical enhancement mechanism and the adsorption orientation‐dependent SERS spectra in our observation. The preferred adsorption orientations calculated by DFT method are consistent with the observed SERS results. Copyright © 2013 John Wiley & Sons, Ltd.     

四种D—氨基葡萄糖甘氨酸混配金属配合物与DNA作用的SERS光…

研究了四种Ｄ－氨基葡萄糖甘氨酸混配合金属配合物的表面增强喇曼光谱（ＳＥＲＳ），发现它们在角胶上的吸附方式基本相同，因而ＳＥＲＳ光谱也基本相似，并用ＳＥＲＳ光谱研究了它们与ＤＮＡ的相互作用，发现这四种化合物与ＤＮＡ的作用能力有很大不同，Ｃｏ（Ⅲ）ＧｌｕＧ是值得进一步研究的可能抗癌药物。     

Identification of species formed after pyridine adsorption on iron,cobalt, nickel and silver electrodes by SERS and theoretical calculations

The adsorption of pyridine (py) on Fe, Co, Ni and Ag electrodes was studied using surface‐enhanced Raman scattering (SERS) to gain insight into the nature of the adsorbed species. The wavenumber values and relative intensities of the SERS bands were compared to the normal Raman spectrum of the chemically prepared transition metal complexes. Raman spectra of model clusters M₄(py) (four metal atoms bonded to one py moiety) and M₄(α‐pyridil) where M = Ag, Fe, Co or Ni were calculated by density functional theory (DFT) and used to interpret the experimental SERS results. The similarity of the calculated M₄(py) spectra with the experimental SERS spectra confirm the molecular adsorption of py on the surface of the metallic electrodes. All these results exclude the formation of adsorbed α‐pyridil species, as suggested previously. Copyright © 2009 John Wiley & Sons, Ltd.     

Surface-enhanced Raman scattering spectroscopy of topotecan-DNA complexes: Binding to DNA induces topotecan dimerization

The interaction of topotecan (TPT), antitumor inhibitor of human DNA topoisomerase I, with calf thymus DNA was studied by surface-enhanced Raman scattering (SERS) spectroscopy. The SERS spectra of TPT are found to depend on its concentration in solution, which is associated with the dimerization of TPT. The spectral signatures of dimerization are identified. It is shown that binding to DNA induces the formation of TPT dimers. The formation of DNA-TPT-TPT-DNA complexes is considered as one of the possible mechanisms of human DNA topoisomerase I inhibition.     

两种新卟啉的FT－SERS光谱

两种新卟啉的ＦＴ－ＳＥＲＳ光谱周光明，盛蓉生，徐知三，王霆，熊亚，王小华，曾云鹗（武汉大学化学系武汉大学分析测试中心武汉４３００７２）（北京Ｂｒｕｋｅｒ公司北京１００８７１）ＦＴ－ＳＥＲＳＳｐｅｃｔｒａｏｆＴｗｏＮｏｖｅｌＰｏｒｐｈｙｒｉｎｓ￥Ｚｈｏ...     

Theoretical elucidation of the origin of surface‐enhanced Raman spectra of PCB52 adsorbed on silver substrates

To better understand experimentally observed surface‐enhanced Raman Scattering (SERS) of polychlorinated biphenyls (PCBs) adsorbed on nanoscaled silver substrates, a systematic theoretical study was performed by carrying out density functional theory and time‐dependent density functional theory calculations. 2,2′,5,5′‐tetrachlorobiphenyl (PCB52) was chosen as a model molecule of PCBs, and Ag_n (n = 2, 4, 6, and 10) clusters were used to mimic active sites of substrates. Calculated normal Raman spectra of PCB52–Ag_n (n = 2, 4, 6, and 10) complexes are analogical in profile to that of isolated PCB52 with only slightly enhanced intensity. In contrast, the corresponding SERS spectra calculated at adopted incident light are strongly enhanced, and the calculated enhancement factors are 10⁴ ~ 10⁵. Thus, the experimentally observed SERS phenomenon of PCBs supported on Ag substrates should correspond to the SERS spectra rather than the normal Raman spectra. The dominant enhancement in Raman intensities origins from the charge transfer resonance enhancement between the molecule and clusters. Copyright © 2014 John Wiley & Sons, Ltd.     

非水电化学体系中激光照射时间对SERS光谱影响的实验研究

本文报道了非水电化学体系中激光照射时间对咪唑在甲醇溶剂中吸附在电化学粗糙了的银电极表面上的表面增强拉曼散射(SERS)效应的影响及咪唑吸附在银电极表面上的SERS谱的连续背景的研究。结果表明,甲醇介质中咪唑吸附在银电极表面上的SERS谱强度随激光照射时间而变化,并且咪唑在甲醇介质中的SERS谱背景较强。初步探讨了咪唑吸附在银电极表面上的SERS效应的增强机制。