Vibronic spectrum of cold, gas-phase allyl radicals by multiphoton ionization

Sappey, Andrew D.; Weisshaar, James C.

doi:10.1021/j100298a004

Cited by 46 publications

(35 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A rotational analysis of the 11 vibrational band in the infrared (IR) spectrum yielded experimental values of the geometrical parameters [11]. The spectral properties of states lying above the first excited stateÃ A have been studied by resonant Raman and resonance-enhanced multiphoton ionization spectroscopies [12][13][14][15][16][17][18]. Recently Tonokura and Koshi remeasured the electronic absorption spectrum of thẽ A A 2 B 1 X X 2 A 2 transition by a cavity ring down method resolving well the vibrational structure [6].…”

Section: Introductionmentioning

confidence: 99%

Rotational analysis of the electronic spectrum of the allyl radical

Achkasova¹,

Araki²,

Denisov³

et al. 2005

Molecular Physics

View full text Add to dashboard Cite

The rotationally resolvedÃ A 2 B 1 X X 2 A 2 electronic spectra of the allyl radical C 3 H 5 and its isotopic derivative C 3 D 5 have been recorded in the gas phase by cavity ring down spectroscopy through a supersonic planar plasma. A rotational analysis yields accurate molecular constants for the first excited electronic state with T 00 ¼ 24 491:229 2ð80Þ for C 3 H 5 . A C 2v planar structure in the zero-point level is indicated. The obtained rotational constants were employed to determine the C-C bond length 1.48 Å and the CCC bond angle 123 in the 2 B 1 electronic state. Two other bands observed are assigned to the excitation of the 7 (339 cm À1 ) and 9 (101 cm À1 ) vibrational modes in the upper electronic state.

show abstract

Section: Introductionmentioning

confidence: 99%

Rotational analysis of the electronic spectrum of the allyl radical

Achkasova¹,

Araki²,

Denisov³

et al. 2005

Molecular Physics

View full text Add to dashboard Cite

show abstract

“…5 The location of the electronic A state was derived from an unassigned, but well resolved absorption spectrum. 6 The UV band system starting at 250 nm was studied in detail by absorption spectroscopy, 7 multiphoton ionization, [8][9][10][11][12] and resonance Raman spectroscopy. 4,13,14 Excited state geometries were derived from partially rotationally resolved MPI spectra.…”

Section: Introductionmentioning

confidence: 99%

Time-resolved photoelectron spectroscopy of the allyl radical: The lifetimes of the ultraviolet bands

Schultz¹,

Fischer²

1998

The Journal of Chemical Physics

View full text Add to dashboard Cite

Articles you may be interested in Gas-phase photodissociation of CH3COCN at 308 nm by time-resolved Fourier-transform infrared emission spectroscopy J. Chem. Phys. 136, 044302 (2012) We report ͓1ϩ1Ј͔ picosecond time-resolved pump-probe photoelectron spectra of the UV bands of the allyl radical. The experiments are performed in a molecular beam of allyl radicals, generated by supersonic jet flash pyrolysis. Photoelectron spectroscopy in a magnetic bottle is shown to be a suitable method for investigating the photophysics of organic radicals. Lifetimes were obtained for all vibronic bands between 250 and 238 nm previously assigned by MPI spectroscopy to the electronically excited B 2 A 1 , C 2 B 1 , and D 2 B 2 states, with values ranging from 20 ps to 9 ps. The nonradiative decay is due to internal conversion to the electronic ground state. Information on the structure of the allyl cation is deduced from the photoelectron spectrum.

show abstract

“…It should be noted that vibrational progressions which cannot be described by direct ionization alone have been observed in experiments on the copper dimer, 32 N 2 O, 33 NO, 34,35 and many other diatomic molecules. 32 Those calculations did not succeed, which may possibly be due to the limited computational capabilities available to researchers in the late 1980s. For the remainder of the photoelectron signal, attempts have been made at reconstruction of autoionized potentials to reproduce those photoelectron spectra.…”

Section: Model and Computational Approachmentioning

confidence: 99%

Superexcited state reconstruction of HCl using photoelectron and photoion imaging

Romanescu

Manzhos

Boldovsky

et al. 2004

The Journal of Chemical Physics

View full text Add to dashboard Cite

The velocity-map imaging technique was used to record photoelectron and photofragment ion images of HCl following two-photon excitation of the E Sigma(+)(0+), V 1Sigma(+)(0+) (nu=9,10,11) states and subsequent ionization. The images allowed us to determine the branching ratios between autoionization and dissociation channels for the different intermediate states. These branching ratios can be explained on the basis of intermediate state electron configurations, since the configuration largely prohibits direct ionization in a one-electron process, and competition between autoionization and dissociation into H* (n=2)+Cl and H+Cl*(4s,4p,3d) is observed. From a fit to the vibrationally resolved photoelectron spectrum of HCl+ it is apparent that a single superexcited state acts as a gateway to autoionization and dissociation into H+Cl*(4s). Potential reconstruction of the superexcited state to autoionization was undertaken and from a comparison of different autoionization models it appears most likely that the gateway state is a purely repulsive and low-n Rydberg state with a (4Pi) ion core.

show abstract

Vibronic spectrum of cold, gas-phase allyl radicals by multiphoton ionization

Cited by 46 publications

References 0 publications

Rotational analysis of the electronic spectrum of the allyl radical

Rotational analysis of the electronic spectrum of the allyl radical

Time-resolved photoelectron spectroscopy of the allyl radical: The lifetimes of the ultraviolet bands

Superexcited state reconstruction of HCl using photoelectron and photoion imaging

Contact Info

Product

Resources

About