Journal of Raman Spectroscopy

Cover image for Journal of Raman Spectroscopy

September 2009

Volume 40, Issue 9

Pages 1093–1333

  1. Rapid Communications

    1. Top of page
    2. Rapid Communications
    3. Research Articles
    1. Raman optical activity of an achiral element in a chiral environment (pages 1093–1095)

      Andrew M. Smith, Richard F. Collins, Rein V. Ulijn and Ewan Blanch

      Version of Record online: 17 AUG 2009 | DOI: 10.1002/jrs.2390

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      Raman optical activity (ROA) is a relatively new technique used to determine the structure of chiral molecules and is proving useful in the study of biological molecules. Here, for the first time, we demonstrate the applicability of ROA as a technique to study achiral groups in chiral environments, detecting the induced chiralty of N-(fluorenyl- 9-methoxycarbonyl) (Fmoc) in a chiral self-assembled structure of Fmoc-dipeptides. This technique is therefore of interest to those studying self-assembled systems that adopt a chiral structure.

  2. Research Articles

    1. Top of page
    2. Rapid Communications
    3. Research Articles
    1. A Raman spectroscopic study of the uranyl mineral rutherfordine—revisited (pages 1096–1103)

      Ray L. Frost and Jiří Čejka

      Version of Record online: 3 FEB 2009 | DOI: 10.1002/jrs.2174

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      The molecular structure of the uranyl mineral rutherfordine has been investigated by the measurement of the NIR and Raman spectra and complemented with infrared spectra including their interpretation. Raman spectra show the presence of four sharp bands at 3511, 3460, 3329 and 3151 cm−1. Corresponding molecular water bending vibrations were only observed in both Raman and infrared spectra of one of two studied rutherfordine samples.

    2. A joint FTIR, FT-Raman and scaled quantum mechanical study of 1,3-dibromo-2,4,5,6-tetra-fluoro benzene (DTB) and 1,2,3,4,5-pentafluoro benzene (PB) (pages 1104–1109)

      V. Krishnakumar and R. Mathammal

      Version of Record online: 31 MAR 2009 | DOI: 10.1002/jrs.2236

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      A complete vibrational analysis of 1,3-dibromo-2,4,5,6-tetrafluoro benzene (DTB) and 1,2,3,4,5-pentafluoro benzene (PB) was performed by combining the experimental and theoretical information using Pulay's density functional theory (DFT) based on scaled quantum chemical approach.

    3. Hydrogen bonding in amylose/DMSO complexes studied by vibrational spectroscopy and density functional theory calculations (pages 1110–1116)

      Alberto Milani, Nur Aiman Fadel, Luigi Brambilla, Mirella Del Zoppo, Chiara Castiglioni, Giuseppe Zerbi and Riccardo Stradi

      Version of Record online: 3 MAR 2009 | DOI: 10.1002/jrs.2240

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      The intermolecular interactions in amylose/dimethyl sulfoxide complexes are discussed both experimentally and theoretically by means of Raman and infrared spectroscopies. Based on the analysis of pure DMSO and DMSO-H2O mixtures, the investigation is extended to amylose complexes where Raman spectroscopy in the CS stretching wavenumber range reveals a high sensitivity to the strength and to the type of interaction involving the DMSO molecules.

    4. Raman spectroscopic study of the mixed anion mineral yecoraite Bi5Fe3O9(Te4+O3)(Te6+O4)2·9H2O (pages 1117–1120)

      Ray L. Frost and Eloise C. Keeffe

      Version of Record online: 3 FEB 2009 | DOI: 10.1002/jrs.2195

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      Tellurates are rare minerals as the tellurate anion is readily reduced to the tellurite ion. Often minerals with both tellurate and tellurite anions are found. An example of such a mineral containing tellurate and tellurite is yecoraite. Raman spectroscopy has been used to study the mixed anion mineral yecoraite Bi5Fe3O9(Te4+O3)(Te6+O4)2·9H2O.

    5. Vibrational spectra and scaled quantum chemical studies of the structure of Martius yellow sodium salt monohydrate (pages 1121–1126)

      M. Snehalatha, C. Ravikumar, I. Hubert Joe and V. S. Jayakumar

      Version of Record online: 3 MAR 2009 | DOI: 10.1002/jrs.2244

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      The FT-Raman and IR spectra were used to investigate dye Martius yellow sodium salt monohydrate (MYM). The vibrational analysis explicate the conjugation or charge transfer interactions of the molecule supported by using the scaled quantum mechanical (SQM) force field technique based on density functional theory (DFT) calculations. A natural bond orbital analysis (NBO) was performed to demonstrate various intramolecular interactions that are responsible for the stabilization of this molecule leading to its bioactivity.

    6. Nanocarbon materials: probing the curvature and topology effects using phonon spectra (pages 1127–1137)

      Sanju Gupta and Avadh Saxena

      Version of Record online: 16 MAR 2009 | DOI: 10.1002/jrs.2245

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      In spite of detailed structural characterization of nanoscale carbons, they still possess some features that are not entirely understood particularly in terms of topological characteristics. By means of resonance Raman spectroscopy, we elucidated the notion of global topology and curvature by determining the prominent Raman bands variation for various carbon nanostructures including tubular (single-, double- and multiwalled nanotubes, peapod), spherical (hypo- and hyperfullerenes, onion-like carbon) and complex (nanocones, nanohorns, nanodisks and nanorings) geometries. This knowledge points to an unprecedented emergent paradigm of global topology/curvature [RIGHTWARDS ARROW] property [RIGHTWARDS ARROW] functionality relationship.

    7. Synthesis and Raman spectroscopic study of Mg/Al,Fe hydrotalcites with variable cationic ratios (pages 1138–1143)

      Sara J. Palmer, Ray L. Frost and Henry J. Spratt

      Version of Record online: 3 MAR 2009 | DOI: 10.1002/jrs.2198

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      Hydrotalcites of formula Mg6(Fe,Al)2(OH)16(CO3)·4H2O formed by intercalation with the carbonate anion as a function of divalent/trivalent cationic ratio have been successfully synthesised. Raman and infrared bands in the OH stretching region are assigned to (1) brucite layer OH stretching vibrations, (2) water stretching bands and (3) water strongly hydrogen bonded to the carbonate anion.

    8. Lattice dynamics and low-temperature Raman spectroscopy studies of PMN–PT relaxors (pages 1144–1149)

      J. A. Lima, W. Paraguassu, P. T. C. Freire, A. G. Souza Filho, C. W. A. Paschoal, J. Mendes Filho, A. L. Zanin, M. H. Lente, D. Garcia and J. A. Eiras

      Version of Record online: 16 MAR 2009 | DOI: 10.1002/jrs.2247

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      By using Raman scattering spectroscopy we have studied the (1 − x)PMN–xPT relaxor close to the morphotropic phase boundary. By analyzing the temperature-dependent Raman spectra, we observed a temperature-induced structural phase transition at 170 K for x = 0.4. Lattice dynamics phonon calculations enable us to interpret the complex Raman signature of the (1 − x)PMN–xPT relaxor.

    9. Vibrational studies of hexagonal bronze systems: phonon calculation and high pressure induced phase transformation (pages 1150–1157)

      J. Santos Coelho, W. Paraguassu, M. Maczka, A. G. Souza Filho, P.T.C. Freire, J. Mendes Filho and J. Hanuza

      Version of Record online: 1 APR 2009 | DOI: 10.1002/jrs.2248

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      By using Raman scattering spectroscopy we have studied RbBi1/3W8/3O9 (RBW) hexa-tungstate under hydrostatic pressure. This material undergoes a pressure-induced structural phase transition at about 4 GPa associated with rotations of octahedral units along the hexagonal axis. Lattice Dynamics Phonon calculations revealed tubular-like vibrations of oxygen atoms in the hexagonal cavities of the K0.26WO3 prototype structure (see Figs 1 and 2). These modes play a fundamental role in the structural instabilities of RBW under hidrostatic pressure.

    10. The intramolecular charge transfer in a donor–π–acceptor dianion probed by resonance Raman spectroscopy and quantum chemical calculations (pages 1158–1161)

      Rômulo A. Ando, Antonio C. Borin and Paulo S. Santos

      Version of Record online: 16 MAR 2009 | DOI: 10.1002/jrs.2250

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      The concerted use of resonance Raman spectroscopy and CASSCF/CASPT2 calculations revealed the intramolecular charge transfer (ICT) nature of the lowest energy electronic transition in the dianionic form of 4-(4-nitrophenylazo)resorcinol. The two extra negative charges generate a chromophoric unit that shows one of the lowest ICT energies observed (λmax = 630 nm) in this class of push–pull molecular systems.

    11. Ultraviolet resonance Raman spectroscopy of locked single-stranded oligo(dA) reveals conformational implications of the locked ribose in LNA (pages 1162–1171)

      Stanislav O. Konorov, H. Georg Schulze, Christopher J. Addison, Charles A. Haynes, Michael W. Blades and Robin F. B. Turner

      Version of Record online: 22 APR 2009 | DOI: 10.1002/jrs.2251

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      Ultraviolet resonance Raman spectroscopy is used to identify the vibrational signatures of conformational changes in stacked bases due to the locked ribose in LNA. These data suggest that the conformation of LNA is dominated by imidazole–imidazole and pyrimidine–pyrimidine repulsion and imidazole–pyrimidine attraction in contrast to dispersion attraction-dependent aggregation in the B-form of DNA.

    12. Direct visual evidence for the chemical mechanism of surface-enhanced resonance Raman scattering via charge transfer: (II) Binding-site and quantum-size effects (pages 1172–1177)

      Mengtao Sun, Shasha Liu, Zhipeng Li, Jianmin Duan, Maodu Chen and Hongxing Xu

      Version of Record online: 16 MAR 2009 | DOI: 10.1002/jrs.2255

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      We describe quantum-size and binding-site effects on the chemical and local field enhancement mechanisms of surface-enhanced resonance Raman scattering (SERRS), in which the pyridine is adsorbed on one of the vertices and surface of Ag20 tetrahedron, respectively. The influence of the binding-site and quantum-size effects on NRS, as well as chemical and electromagnetic enhancement mechanisms on SERRS, is significant.

    13. Raman scattering studies of (GaP)n/(InP)n (n = 1, 1.7, 2) short-period superlattice structures (pages 1178–1182)

      H. Rho, J.-R. Lim, J. D. Song, W. J. Choi and Y. T. Lee

      Version of Record online: 16 MAR 2009 | DOI: 10.1002/jrs.2256

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      Raman spectra from (GaP)n/(InP)n short-period superlattice structures were investigated to study the effect of lateral composition modulation (LCM) on the behavior of optical phonons. We observed a significant increase of the InP- and the GaP-like longitudinal optical phonon energies related to the formation of LCM. A broadening of the phonon line shapes was also observed.

    14. Fourier-transform infrared and Raman spectra, vibrational assignment and density functional theory calculations of 1,4,5-triazanaphthalene (pages 1183–1187)

      V. Krishnakumar and R. Ramasamy

      Version of Record online: 1 MAY 2009 | DOI: 10.1002/jrs.2258

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      The vibrational analysis of 1,4,5-triazanaphthalene was carried out using Pulay's DFT-based scaled quantum mechanical (SQM) approach. The observed and calculated wavenumbers agree well. The various vibrational modes are discussed in detail.

    15. Synthesis of different gold nanostructures by solar radiation and their SERS spectroscopy (pages 1188–1193)

      Hongjun Chen, Yuling Wang and Shaojun Dong

      Version of Record online: 26 MAY 2009 | DOI: 10.1002/jrs.2259

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      We propose a simple method to synthesize different morphologies of gold nanostructures by solar radiation, which can then be used as SERS substrates with p-aminothiophenol as the probe molecule. The flowerlike gold nanostructures show the strongest SERS effect.

    16. Real-time molecular assessment on oxidative injury of single cells using Raman spectroscopy (pages 1194–1199)

      Wei-Tien Chang, Hung-Lung Lin, Hung-Che Chen, Yao-Ming Wu, Wen-Jone Chen, Yuan-Teh Lee and Ian Liau

      Version of Record online: 22 APR 2009 | DOI: 10.1002/jrs.2261

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      We combined laser tweezers and Raman spectroscopy to study the response of a single cell to oxidative stress. By means of sequential spectral measurements, we identified lipid peroxidation occurring during oxidative injury and demonstrated the therapeutic effect of ascorbic acid to such injury at the molecular level.

    17. Effects of metal ion on the water structure studied by the Raman O[BOND]H stretching spectrum (pages 1200–1204)

      Ruihua Li, Zhanpeng Jiang, Yuntao Guan, Hongwei Yang and Bo Liu

      Version of Record online: 27 MAR 2009 | DOI: 10.1002/jrs.2262

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      With a five-component Gaussian deconvolution of the Raman spectra of aqueous solutions of NaCl, MgCl2, AlCl3 and FeCl3, the cationic effects are found to be similar on the components at 3233, 3393, 3511 and 3628 cm−1, but different on component at 3051 cm−1. All the metal ions break the water structure, and the ions with more ionic charges have a strong influence on oxygen of water and make strong hydrogen bonds.

    18. Temperature-dependent Raman spectra of Ba2BiSbO6 ceramics (pages 1205–1210)

      Manoel Carvalho Castro Jr, Edson Firmino Viana Carvalho, Waldeci Paraguassu, Alejandro Pedro Ayala, Frank C. Snyder, Michael W. Lufaso and Carlos William de Araujo Paschoal

      Version of Record online: 20 APR 2009 | DOI: 10.1002/jrs.2263

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      In this work, we have performed Raman scattering measurements in Ba2BiSbO6 ceramics in the temperature range from 10 to 573 K. The Raman spectra were examined using group theory to analyze the decomposition of the reducible representation of the vibrational modes and with a virtual octahedra model. Both structural phase transitions that this compound exhibits were subtly observed.

    19. FT-IR, FT-Raman and DFT calculations of the salicylanilide derivate 4-chloro-2-(4-bromophenylcarbamoyl)phenyl acetate (pages 1211–1223)

      Hema Tresa Varghese, C. Yohannan Panicker, V.S. Madhavan, Samuel Mathew, Jarmila Vinsova and Christian Van Alsenoy

      Version of Record online: 8 APR 2009 | DOI: 10.1002/jrs.2265

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      FT-Raman and FT-IR spectra of 4-chloro-2-(4-bromophenylcarbamoyl)phenyl acetate were recorded and analyzed. The vibrational wavenumbers of the title compound have been computed using the B3LYP/6-31G* basis and compared with the experimental data. The simultaneous IR and Raman activations of the C[DOUBLE BOND]O stretching mode gives the charge transfer interaction through a π-conjugated path. The assignments of the normal modes are done by PED calculations.

    20. Structural characterization of Lu0.7Y0.3AlO3 single crystal by Raman spectroscopy (pages 1224–1228)

      Alberto Casu, Pier Carlo Ricci and Alberto Anedda

      Version of Record online: 1 APR 2009 | DOI: 10.1002/jrs.2266

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      Lutetium yttrium orthoaluminate perovskite [Lu0.7Y0.3AlO3 (LuYAP)] crystals show great potential as fast response and high-efficiency scintillators. This paper offers a complete analysis of the vibrational modes of the LuYAP crystal by polarized Raman spectroscopy in the temperature range of 20-290 K and compares the experimental results with numerical methods in order to characterize the crystal structure. An interpretation of the data in terms of vibrating molecular structures is suggested and the results are successfully confronted with the vibrational modes of similar perovskite crystals.

    21. High-resolution narrowband CARS spectroscopy in the spectral fingerprint region (pages 1229–1233)

      P. F. Chimento, M. Jurna, H. S. P. Bouwmans, E. T. Garbacik, L. Hartsuiker, C. Otto, J. L. Herek and H. L. Offerhaus

      Version of Record online: 27 MAR 2009 | DOI: 10.1002/jrs.2267

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      An optical parametric oscillator (OPO) is an ideal tunable light source for coherent anti-Stokes Raman scattering (CARS) spectroscopy. An OPO specially designed for high-resolution CARS spectroscopy in the fingerprint region is presented here. The first results of applying the maximum entropy method of phase retrieval to narrowband CARS spectroscopy, in order to retrieve the purely resonant CARS spectrum, are shown.

    22. Fetuin and osteocalcin interact with calcospherite formation during the calcification process of poly(2-hydroxyethylmethacrylate) in vitro: a Raman microspectroscopic monitoring (pages 1234–1239)

      H. Libouban, R. Filmon, A. Mauréac, M. F. Baslé and D. Chappard

      Version of Record online: 8 APR 2009 | DOI: 10.1002/jrs.2272

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      Calcification of bone and cartilage is a complex process. Noncollageneous proteins such as fetuin and osteocalcin (BGP) interact with the growth of HA crystals and control the size of the calcospherites. These proteins, which are present in small amounts in the medium used for crystal growth, can be found adsorbed onto the HA calcospherites by Raman microspectroscopy.

    23. Characterization of pottery from the Republic of Macedonia I: Raman analyses of Byzantine glazed pottery excavated from Prilep and Skopje (12th–14th century) (pages 1240–1248)

      Vinka Tanevska, Philippe Colomban, Biljana Minčeva-Šukarova and Orhideja Grupče

      Version of Record online: 27 APR 2009 | DOI: 10.1002/jrs.2273

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      At least 17 different minerals in the ceramic body were identified from the Raman spectra, among which were a variety of feldspars, as well as andradite, apatite and forsterite. According to the identified minerals, the locations of the used raw materials in the vicinity of the archaeological sites are proposed. There is a good correlation between the polymerization index derived from the Raman spectra and the lead content obtained from the SEM-EDXS analyses; thus the firing temperature of the analyzed glazes could be assessed.

    24. Lineshape analysis of stimulated Raman spectra of the near-nozzle region of free jet expansions (pages 1249–1256)

      Ángel Ramos, Julio Santos, Laura Abad, Dionisio Bermejo, Víctor J. Herrero and Isabel Tanarro

      Version of Record online: 20 APR 2009 | DOI: 10.1002/jrs.2274

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      An anomalous lineshape of stimulated Raman spectra obtained from the region very close to the nozzle of supersonic pulsed expansions of N2 is presented. The combination of Doppler shifts and strong gradients of density and temperature yield an inhomogeneous broadening and a double-peak structure of the recorded Raman line profiles. Their comparation with simulations provides information about the near-nozzle flow field. This lineshape is not related to effects of clustering on the jet axis.

    25. Polarization Raman study of protein ordering by controllable RBC deformation (pages 1257–1261)

      Satish Rao, Štefan Bálint, Luisa del Carmen Frias and Dmitri Petrov

      Version of Record online: 8 APR 2009 | DOI: 10.1002/jrs.2275

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      Red blood cells are stretched using optical tweezers while simultaneously recording their Raman spectrum. The depolarization ratios of the heme Raman bands change upon stretching, which indicates the existence and deformation-induced altering of protein ordering in the cell. The result points to a larger role of deformation in the functionality of the red blood cell.

    26. FT-IR and FT-Raman spectra and ab initio calculations of 3-{[(2-hydroxyphenyl) methylene]amino}-2-phenylquinazolin-4(3H)-one (pages 1262–1273)

      C. Yohannan Panicker, Hema Tresa Varghese, K.R. Ambujakshan, Samuel Mathew, Subarna Ganguli, Ashis Kumar Nanda and Christian Van Alsenoy

      Version of Record online: 8 APR 2009 | DOI: 10.1002/jrs.2276

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      FT-Raman and FT-IR spectra of 3-{[(2-hydroxy-phenyl)methylene]amino}-2-phenylquinazolin-4(3H)-one were recorded and analyzed. The vibrational wavenumbers of the title compound were computed using the HF/6-31G* basis and compared with the experimental data. The prepared compound was identified by NMR and mass spectra. The simultaneous IR and Raman activation of the C[DOUBLE BOND]O stretching mode gives the charge transfer interaction through a π-conjugated path. The assignments of the normal modes are done by potential energy distribution calculations.

    27. Effect of Pb2+ on L-glutathione monolayers on a silver surface investigated by surface-enhanced Raman scattering spectroscopy (pages 1274–1278)

      Chun Sheng, Han Zhao, Fukang Gu and Haifeng Yang

      Version of Record online: 20 APR 2009 | DOI: 10.1002/jrs.2277

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      SERS experiments were carried out to understand the structure of L-glutathione monolayers on a silver surface and the impact of Pb2+. In presence of Pb2+, the adsorption mode of L-glutathione on the silver surface changed from mercapto group along with imine, amino and entire carboxyl groups as the direct co-adsorption sites to mercapto and imine (N3H) groups as the anchoring sites.

    28. A study of collective motions in liquid tert-butanol from low-wavenumber Raman scattering (pages 1279–1283)

      P. Sassi, M. Paolantoni, S. Perticaroli, F. Palombo and A. Morresi

      Version of Record online: 28 APR 2009 | DOI: 10.1002/jrs.2278

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      The collective properties of liquid tert-butyl alcohol were analysed by low-wavenumber Raman scattering spectroscopy. Vibrational and relaxation phenomena of this H-bonding system were assessed in pure liquid phase and in solution with 2,2′-dimethyl butane and water.

    29. Visible Raman spectroscopy for the discrimination of olive oils from different vegetable oils and the detection of adulteration (pages 1284–1289)

      R. M. El-Abassy, P. Donfack and A. Materny

      Version of Record online: 27 APR 2009 | DOI: 10.1002/jrs.2279

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      Raman spectroscopy is a powerful tool for chemical analysis. Its advantages are well known for the investigation of food quality. In our work, we demonstrate that Raman spectroscopy using visible laser excitation is capable of differentiating between olive oil and 13 types of vegetable oils and detecting adulterations of virgin olive oil with high reliability and sensitivity.

    30. Surface-enhanced Raman scattering of 4-mercaptopyridine on sub-monolayers of α-Fe2O3 nanocrystals (sphere, spindle, cube) (pages 1290–1295)

      Xiaoqi Fu, Fengli Bei, Xin Wang, Xujie Yang and Lude Lu

      Version of Record online: 8 APR 2009 | DOI: 10.1002/jrs.2281

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      High quality of SERS spectra from 4-mercaptopyridine (4-Mpy) molecules adsorbed on sub-monolayers of α-Fe2O3 nanocrystals (sphere, spindle, cube) have been recorded. 4-Mpy molecules are adsorbed on the surface of substrate through the sulfur atom at a perpendicular orientation. The charge transfer mechanism is suggested as most likely responsible for the observed enhancement as plasmon resonances do not occur.

    31. Irbesartan: FTIR and Raman spectra. Density functional study on vibrational and NMR spectra (pages 1296–1300)

      Carlos A. Franca, Susana B. Etcheverry, Reinaldo Pis Diez and Patricia A. M. Williams

      Version of Record online: 6 MAY 2009 | DOI: 10.1002/jrs.2282

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      Arterial hypertension is treated with non peptide antagonists of the receptor of the enzyme angiotensin II such as Irbesartan. Irbesartan exists in two tautomeric forms. The infrared and Raman spectra using a mixture of both forms, as supplied, were recorded and discussed assisted with density functional theory (6-31G** basis set, animated pictures). 13C, 15N and 1H NMR together with vibrational theoretical studies allowed the determination of the main features of the A and B tautomers.

    32. Real-time measurement of H/D exchange in a microdialysis Raman quartz cell (pages 1301–1305)

      Pedro Carmona and Marina Molina

      Version of Record online: 8 APR 2009 | DOI: 10.1002/jrs.2283

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      A novel quartz cell is presented here for monitoring H/D exchange in biomolecules by using Raman spectroscopy. This cell is combined with a syringe to pump heavy water through a hollow microdialysis fibre, which is inserted into the cell. The fastest D2O efflux that we have obtained permits to measure exchange rates of 2.5 min−1 or less.

    33. Electrochemical and in situ SERS spectroelectrochemical investigations of 4-methyl-4H-1, 2, 4-triazole-3-thiol monolayers at a silver electrode (pages 1306–1311)

      Yiping Sun, Wei Song, Xuan Zhu, Rui Zhang, Qiuyi Pang, Zongrang Zhang and Haifeng Yang

      Version of Record online: 8 APR 2009 | DOI: 10.1002/jrs.2284

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      The SERS spectrum of 4-methyl-4H-1, 2,4-triazole-3-thiol reveals the adsorption fashion via S6 and N2 atoms to form monolayers on the silver surface. Electrochemical experimental results exhibit a sound anticorrosive feature of 4-methyl-4H-1, 2, 4-triazole-3-thiol monolayers for silver.

    34. Resonance Raman spectra and excited state structural dynamics of ethylene trithiocarbonate in the A- and B-band absorptions (pages 1312–1318)

      Huigang Wang, Bo Liu, Yanying Zhao and Xuming Zheng

      Version of Record online: 22 APR 2009 | DOI: 10.1002/jrs.2285

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      The significant intensity enhancement in the B-band (282.4 nm) resonance Raman spectrum of the nominal S[BOND]C[BOND]S antisymmetry vibrational modes (υ14) of ethylene trithiocarbonate relative to A-band (319.9 nm) and FT-Raman spectra suggest a possible existence of the vibronic coupling in the B-band absorption.

    35. Surface-enhanced Raman scattering (SERS) spectra of chloramphenicol in Ag colloids prepared by microwave heating method (pages 1319–1323)

      M. Z. Si, Y. P. Kang and Z. G. Zhang

      Version of Record online: 29 APR 2009 | DOI: 10.1002/jrs.2286

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      Ag colloids were prepared by the microwave heating method. The UV-visible spectrum and transmission electron microscopy (TEM) were employed to characterize the Ag colloids. The surface-enhanced Raman scattering (SERS) spectra of chloramphenicol (CAP) in Ag colloids were successfully recorded. The Raman spectra of CAP were recorded with good concordance comparing to the theoretical results calculated by the Gaussian'98 program. CAP molecules on the Ag surface are oriented tilted to the particle surface via C20-O23, N-O13, and N-O23, which played an important role in the SERS effect.

    36. Deep-UV tip-enhanced Raman scattering (pages 1324–1330)

      Atsushi Taguchi, Norihiko Hayazawa, Kentaro Furusawa, Hidekazu Ishitobi and Satoshi Kawata

      Version of Record online: 17 APR 2009 | DOI: 10.1002/jrs.2287

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      The tip-enhancement of resonance Raman scattering for DUV excitation wavelength was demonstrated for the first time using an aluminum tip that acts as a plasmonic material in DUV wavelengths. With results demonstrated here, molecular analysis and imaging with nanoscale spatial resolution in DUV resonance Raman spectroscopy can be realized using the tip-enhancement effect.

    37. Measurement of the absolute Raman scattering cross section of the 1584-cm−1 band of benzenethiol and the surface-enhanced Raman scattering cross section enhancement factor for femtosecond laser-nanostructured substrates (pages 1331–1333)

      R. L. Aggarwal, L. W. Farrar, E. D. Diebold and D. L. Polla

      Version of Record online: 14 AUG 2009 | DOI: 10.1002/jrs.2396

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      The absolute Raman scattering cross section of the 1584-cm− 1 band of benzenethiol has been measured to be 8.9 ± 1.8 × 10−30 cm2 using a 785-nm pump laser and a 675 C blackbody for the spectrometer signal calibration. We also measured the surface-enhanced Raman scattering (SERS) enhancement factor (EF) of 0.8 ± 0.3 × 106 for a silver-coated, femtosecond laser-nanostructured substrate.

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