A new insight into the vibrational analysis of pyridine

Ureña, Francisco Partal; Gómez, M. Fernández; González, Juan Jesús López; Torres, E.

doi:10.1016/s1386-1425(03)00082-9

Cited by 122 publications

(69 citation statements)

References 52 publications

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“…This structure was not resolved previously and provided an adiabatic value for ionization of 15.247 eV. The ionization from the 9a 1 state can be associated with one mode of (8a + 12) that is an in-plane ring bend associated with a C-C stretch, according to the findings of Partal Urena et al [7]. The second band is due to ionization from 8a 1 orbital.…”

Section: Resultsmentioning

confidence: 72%

“…From there, Reineck et al concluded that in the photoelectron spectrum, only the fully symmetric vibrational modes are expected to be strongly excited, and thus only ten of them are of potential interest. In our spectra we also found the series that could not have been assigned to those ten modes due to discrepancies in energy values, therefore, we also used assignments proposed by Partal Urena et al [7]. In their work additional combinations of vibrational modes were assigned.…”

Section: Resultsmentioning

confidence: 80%

“…This simple aromatic azabenzene has been extensively studied in the past with respect to both its vibrational [6][7][8] and electronic structure [9] by experimental [10][11][12][13][14] and computational [15][16][17][18] approaches. Moreover, low-lying Rydberg states have also been examined for this molecule [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Photoelectron and threshold photoelectron valence spectra of pyridine

et al. 2016

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Abstract.The pyridine molecule has been examined by the means of photoelectron and threshold photoelectron spectroscopies. Ionization energies were determined for both outer and inner valence orbitals and new adiabatic values were also resolved. Vibronic structure associated with several states was assigned mainly to be due to C-C stretches and ring bends. Additionally a Rydberg state converging to 7b2 state was ascribed. The data shown here are in a good agreement with previous results and brings some new insights into the electronic structure of this biologically and astrochemically relevant and important molecule.

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Section: Resultsmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 80%

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Photoelectron and threshold photoelectron valence spectra of pyridine

et al. 2016

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“…3) were chosen. -ν 8a [39,40]. All these bands originate from aromatic ring vibrations and exhibit A1 symmetry (for details see reference [39]).…”

Section: Sers Measurementsmentioning

confidence: 99%

“…-ν 8a [39,40]. All these bands originate from aromatic ring vibrations and exhibit A1 symmetry (for details see reference [39]). We found also that the intensities of the SERS signals of pyridine adsorbed on such substrates are influenced by the nanopore/nanotube size.…”

Section: Sers Measurementsmentioning

confidence: 99%

TiO2 and Al2O3 nanoporous oxide layers decorated with silver nanoparticles—active substrates for SERS measurements

Pisarek

Hołdyński

Roguska

et al. 2014

J Solid State Electrochem

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Self-organized nanoporous oxide layers (TiO 2 , Al 2 O 3 ) exhibiting specific properties, obtained by anodic oxidation at a constant voltage in neutral electrolyte, may serve as attractive SERS substrates for investigating the interactions between an adsorbate and adsorbent, or as a stable platform for detecting various organic compounds. This paper presents the influence of the size of the nanotubes/nanopores and the structure of the porous oxide layers on the SERS enhancement factor, E F . We used pyridine and mercaptobenzoic acid as probe molecules, since they have a large cross-section for Raman scattering. To characterize the morphology and structure of the oxide layer substrates, before and after vacuum vapor deposition of silver nanoparticles, we applied scanning electron microscopy, X-ray diffraction and surface analytical techniques: AES, XPS and SERS. The results obtained show that for the same amount of Ag (0.02 mg/cm 2 ) the size of the nanopores significantly affects the E F , which reaches, at a properly chosen nanopore size, distinctly higher values than that characteristic of a standard silver surface roughened by electrochemical cycling, i.e. E F >10 6 . The new Ag/MeO x -NT composites layer, ensure a good reproducibility of the SERS measurements and exhibit stability over a limited period of time.

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High‐Resolution Fourier Transform Infrared Spectroscopy

Albert

Qüack

2011

Handbook of High‐resolution Spectroscopy

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Recent developments and applications of high‐resolution Fourier transform spectroscopy are reviewed. A short historical summary of the development of high‐resolution interferometric Fourier transform infrared (FTIR) spectrometers is given and the possibilities of the currently most highly resolving FTIR spectrometers, including a current prototype built for the Zürich group at the Swiss Light Source SLS as a synchrotron light source, are discussed. A short description of the principles of FTIR spectroscopy is given and the resolution of current spectrometers is illustrated by FTIR spectra of CO, CO 2 OCS, N 2 O, CS 2 , and CH 4 and its isotopomers. The computational tools necessary to analyze FTIR spectra are described briefly. As examples of rovibrational analysis of more complex spectra, selected molecules CHCl 2 F, CDBrClF, pyridine (C 6 H 5 N) and pyrimidine (C 4 H 4 N 2 ), and naphthalene (C 10 H 8 ) are discussed. The spectrum of CHCl 2 F, a fluorochlorocarbon, is of interest for a better understanding of the chemistry of the Earth's atmosphere. It also possesses an isotopically chiral isotopomer CH 35 Cl 37 ClF analyzed in natural abundance. CDBrClF is a chiral molecule and therefore the analysis of its rovibrational spectra provides the basis for carrying out further experiments toward the detection of molecular parity violation. The analyses of the pyridine, pyrimidine, and naphthalene FTIR spectra illustrate the potential of the new generation of FTIR spectrometers in the study of spectra and rovibrational dynamics of aromatic systems and molecules of potential biological interest. In particular, naphthalene is a prototype molecule useful in gaining an understanding of the unidentified infrared bands (UIBs) detected in several interstellar objects.

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A new insight into the vibrational analysis of pyridine

Cited by 122 publications

References 52 publications

Photoelectron and threshold photoelectron valence spectra of pyridine

Photoelectron and threshold photoelectron valence spectra of pyridine

TiO2 and Al2O3 nanoporous oxide layers decorated with silver nanoparticles—active substrates for SERS measurements

High‐Resolution Fourier Transform Infrared Spectroscopy

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