Results 301 to 310 of about 390,003 (343)
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Molecular ion collision chemistry in CH4 ionization and dissociation
International Journal of Mass Spectrometry, 2016Abstract The use of the 90° hemispheric electrostatic high resolution analyzer in conjunction with the time-of-flight (TOF) technique allowed us to identify various species associated with the ionization of methane molecular gas by a pulsed fast 19 MeV F4+ beam.
A.T. Hasan, T.J. Gray
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ChemInform Abstract: Dissociative Pathways in Platinum(II) Chemistry
ChemInform, 1991AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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Intriguing roles of reactive intermediates in dissociation chemistry of N-phenylcinnamides
Organic & Biomolecular Chemistry, 2012In mass spectrometry of protonated N-phenylcinnamides, the carbonyl oxygen is the thermodynamically most favorable protonation site and the added proton is initially localized on it. Upon collisional activation, the proton transfers from the carbonyl oxygen to the dissociative protonation site at the amide nitrogen atom or the α-carbon atom, leading to
Cheng, Guo +5 more
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Excited-State Acid−Base Chemistry: Evidence for a Dissociative Excited State
Inorganic Chemistry, 2003Excitation (410 nm) of the bimetallic [(bpy)(2)Ru(CN)(mu-CN)Rh(NH(3))(4)Br](2+) produces the MLCT state localized on the (bpy)(2)Ru(CN)(2) ligand. Photoinduced cleavage of the bimetallic occurs in the presence of [H(+)], and the dependence yields a K(a) equivalent to that for ground-state cis-(bpy)(2)Ru(CN)(2) implying separation of the bimetallic ...
Jianwei, Fan +7 more
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European Journal of Mass Spectrometry, 2008
The collision induced dissociation and electron induced dissociation spectra of the [2M + H]+ and [2M + Na]+ clusters of the zwitterionic amino acid, betaine (M), have been examined in a hybrid linear ion trap Fourier transform ion cyclotron resonance mass spectrometer.
Linda, Feketeová +2 more
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The collision induced dissociation and electron induced dissociation spectra of the [2M + H]+ and [2M + Na]+ clusters of the zwitterionic amino acid, betaine (M), have been examined in a hybrid linear ion trap Fourier transform ion cyclotron resonance mass spectrometer.
Linda, Feketeová +2 more
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The Journal of Physical Chemistry Letters, 2011
We report infrared multiple-photon dissociation (IRMPD) spectra of protonated tryptophan, TrpH+, as well as the dissociation products from NH3 loss, [Trp+H−NH3]+, and subsequent CH2CO loss, [Trp+H−NH3−CH2CO]+. These results were obtained using a custom-built mass spectrometer, where the mass-isolated ions were photodissociated by a tunable optical ...
Warren K. Mino +4 more
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We report infrared multiple-photon dissociation (IRMPD) spectra of protonated tryptophan, TrpH+, as well as the dissociation products from NH3 loss, [Trp+H−NH3]+, and subsequent CH2CO loss, [Trp+H−NH3−CH2CO]+. These results were obtained using a custom-built mass spectrometer, where the mass-isolated ions were photodissociated by a tunable optical ...
Warren K. Mino +4 more
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Dissociative Recombination Chemistry and Plasma Dynamics
2008Abstract : Advances made in the study of the dissociation dynamics and product branching ratios of energized transient neutral molecules formed by charge-transfer (DCE) and recombination of cations with free electrons (DR) are reviewed. The results obtained include detailed measurements of the three-body dissociation of H3, O4 and sym-triazine (HCN)3 ...
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Surface chemistry in three dimensions: CO dissociation between two surfaces
Chemical Physics Letters, 2000Abstract Based on self-consistent density functional calculations it is shown that a new dissociation process for CO adsorbed on a Ru(0001) surface is made possible when the distance to a second Ru(0001) surface placed just above it is below some critical value.
M.V. Bollinger +2 more
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Dissociation of the Ethyl Radical: An Exercise in Computational Chemistry
Journal of Chemical Education, 2014A set of exercises for use in a typical physical chemistry laboratory course are described, modeling the unimolecular dissociation of the ethyl radical to form ethylene and atomic hydrogen. Students analyze the computational results both qualitatively and quantitatively.
Nahal Nassabeh +2 more
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Dissociation Processes in Plasma Chemistry and Gaseous Dielectrics
1991Plasma processing is widely used in integrated circuit manufacturing. In a typical plasma process a chemically nonreactive feed gas flows into a discharge reactor where the discharge electrons dissociate the feed gas and produce chemically reactive products.
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