Interaction of a supersonic beam of toluene with a resonant RF electric field

Morato, M.; Cáceres, J. O.; Ureña, A. González

doi:10.1140/epjd/e2006-00094-2

Cited by 3 publications

(10 citation statements)

References 17 publications

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“…Transverse beam profile as a function of the slit position: (dashed line) ON beam profile from ref ; (solid line) present results, i.e., those of the bottom panel from Figure .…”

Section: Data Analysis and Discussionmentioning

confidence: 93%

“…The main features of the experimental methodology have been described elsewhere, , and only a brief description is given here. The present experiment employs a supersonic beam of toluene produced by bubbling 3 bar of He through liquid toluene at 0 °C.…”

Section: Experimental Methods and Molecule−field Interaction Conditionsmentioning

confidence: 99%

“…The volatile impurities were removed from the toluene through freeze and thaw cycles. The supersonic expansion occurs through a nozzle of 0.5 mm of diameter, with the rest of the conditions those described in ref . For a better understanding of the beam geometry and collimation, a simplified layout of the experimental setup is shown in Figure .…”

Section: Experimental Methods and Molecule−field Interaction Conditionsmentioning

confidence: 99%

“…The interaction of polar molecules with resonant RF electric fields is a subject currently investigated by our group using different experimental methodologies. − Thus, depletion spectra of molecular beams have been reported when such polar molecules interact with static and resonant RF fields. − More recently, beam splitting of 1.5 mm toward both the positive and negative direction perpendicular to the beam propagation axis of a supersonic toluene beam seeded in He was reported as a result of its resonant interaction with a RF electric field. The observed toluene beam splitting could be explained by the onset of molecular interferences induced by the resonant RF field…”

Section: Introductionmentioning

confidence: 99%

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Interferences in the Transverse Profile of a Toluene Beam Induced by a Resonant RF Electric Field

et al. 2009

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In this work, the interaction of a supersonic beam of toluene diluted in He with a resonant oscillating RF field is investigated both experimental and theoretically. It is shown how the resonant field induces a peak structure in the transverse beam profile which can be explained by the onset of molecular interferences. Specifically, the interaction of a toluene beam of 0.12 eV of translational energy with a resonant RF field of 1.12 kV/m amplitude, and -610 kV/m(2) of gradient at the horizontal plane, during 160 micros produces a series of maxima in the transverse beam profile. The observed structure was satisfactorily reproduced by a quantum interference model based on the interaction of two coherent superpositions induced by the resonant RF field. It appears the present experimental technique could be useful to investigate the spectroscopy and dynamical behavior of coherent beams of polar molecules.

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“…Transverse beam profile as a function of the slit position: (dashed line) ON beam profile from ref ; (solid line) present results, i.e., those of the bottom panel from Figure .…”

Section: Data Analysis and Discussionmentioning

confidence: 93%

Section: Experimental Methods and Molecule−field Interaction Conditionsmentioning

confidence: 99%

Section: Experimental Methods and Molecule−field Interaction Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Interferences in the Transverse Profile of a Toluene Beam Induced by a Resonant RF Electric Field

et al. 2009

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“…It was shown that the formerly observed beam depletion 1 was the consequence of the beam deflection under resonant conditions. 4 Though a full theoretical analysis of this phenomenon is still needed, recent work from our group 5,6 indicated that the observed molecular beam deflection can be explained by molecular interferences.…”

Section: Introductionmentioning

confidence: 99%

Interaction of Polar Molecules with Resonant Radio Frequency Electric Fields: Imaging of the NO Molecular Beam Splitting

2006

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The interaction between a NO supersonic beam and a resonant radio frequency (RF) field is investigated using laser ionization coupled to imaging techniques. It is shown how the resonant interaction leads to a beam splitting of +/-0.2 degrees toward both positive and negative direction perpendicular to the beam propagation axis. This phenomenon is rationalized using a model based on molecular interferences produced by the action of the resonant RF electric field.

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Electronic Structures and Spin Topologies of γ-Picoliniumyl Radicals. A Study of the Homolysis ofN-Methyl-γ-picolinium and of Benzo-, Dibenzo-, and Naphthoannulated Analogs

et al. 2008

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Radicals resulting from one-electron reduction of (N-methylpyridinium-4-yl) methyl esters have been reported to yield (N-methylpyridinium-4-yl) methyl radical, or N-methyl-gamma-picoliniumyl for short, by heterolytic cleavage of carboxylate. This new reaction could provide the foundation for a new structural class of bioreductively activated, hypoxia-selective antitumor agents. N-methyl-gamma-picoliniumyl radicals are likely to damage DNA by way of H-abstraction and it is of paramount significance to assess their H-abstraction capabilities. In this context, the benzylic C-H homolyses were studied of toluene (T), gamma-picoline (P, 4-methylpyridine), and N-methyl-gamma-picolinium (1c, 1,4-dimethylpyridinium). With a view to providing capacity for DNA intercalation the properties also were examined of the annulated derivatives 2c (1,4-dimethylquinolinium), 3c (9,10-dimethylacridinium), and 4c (1,4-dimethylbenzo[g]quinolinium). The benzylic C-H homolyses were studied with density functional theory (DFT), perturbation theory (up to MP4SDTQ), and configuration interaction methods (QCISD(T), CCSD(T)). Although there are many similarities between the results obtained here with DFT and CI theory, a number of significant differences occur and these are shown to be caused by methodological differences in the spin density distributions of the radicals. The quality of the wave functions is established by demonstration of internal consistencies and with reference to a number of observable quantities. The analysis of spin polarization emphasizes the need for a clear distinction between "electron delocalization" and "spin delocalization" in annulated radicals. Aside from their relevance for the rational design of new antitumor drugs, the conceptional insights presented here also will inform the understanding of ferromagnetic materials, of spin-based signaling processes, and of spin topologies in metalloenzymes.

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Interaction of a supersonic beam of toluene with a resonant RF electric field

Cited by 3 publications

References 17 publications

Interferences in the Transverse Profile of a Toluene Beam Induced by a Resonant RF Electric Field

Interferences in the Transverse Profile of a Toluene Beam Induced by a Resonant RF Electric Field

Interaction of Polar Molecules with Resonant Radio Frequency Electric Fields: Imaging of the NO Molecular Beam Splitting

Electronic Structures and Spin Topologies of γ-Picoliniumyl Radicals. A Study of the Homolysis ofN-Methyl-γ-picolinium and of Benzo-, Dibenzo-, and Naphthoannulated Analogs

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