Zobrazeno 1 - 10
of 118
pro vyhledávání: '"John C. Traeger"'
Autor:
John C. Traeger
The development of electron ionization as a means for ion generation in mass spectrometry is described from its start in 1918 through recent variations. Particular reference is made to the relative advantages and disadvantages of various ion source d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c0bc7b2274ea47e61028b4aea48291b
https://doi.org/10.1016/b978-0-08-043848-1.00008-0
https://doi.org/10.1016/b978-0-08-043848-1.00008-0
Autor:
John C. Traeger
Publikováno v:
European Journal of Mass Spectrometry. 15:183-188
Dissociative photoionization mass spectrometry has been used to measure the PhCO+ appearance energies for several benzoyl compounds. Based on these threshold measurements, an experimental 298 K heat of formation of 738.8 ± 3.3 kJ mol−1 is obtained
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dce098b0d0c8647141751d35ba8785aa
https://doi.org/10.1255/ejms.949
https://doi.org/10.1255/ejms.949
Autor:
John C. Traeger
Publikováno v:
The Journal of Physical Chemistry A. 112:342-346
Dissociative photoionization mass spectrometry has been used to measure appearance energies for the 1-hydroxyethyl cation (CH(3)CH=OH(+)) formed from ethanol and 2-propanol. Molecular orbital calculations for these two unimolecular fragmentation reac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a55de229eedd8bb206b2cb1a8f513e5
https://doi.org/10.1021/jp077596y
https://doi.org/10.1021/jp077596y
Autor:
John C. Traeger
Publikováno v:
The Journal of Physical Chemistry A. 111:4643-4649
Photoionization mass spectrometry has been used to measure appearance energies for immonium cation formation from 25 alkyl amine precursors. A number of the unimolecular fragmentation processes are shown to involve excess energy at threshold so that,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9adc453cb93db1f0a4144a485dc89a15
https://doi.org/10.1021/jp068697j
https://doi.org/10.1021/jp068697j
Autor:
John C. Traeger, Zoë A. Harvey
Publikováno v:
The Journal of Physical Chemistry A. 110:8542-8547
The m/z 44 appearance energies for five primary amines have been measured by threshold photoionization mass spectrometry. Following an analysis of the thermochemistry associated with these unimolecular fragmentations, a value of 665.1 +/- 1.4 kJ mol(
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c874b38ec8bf950455a53f7c09f44ac6
https://doi.org/10.1021/jp056409y
https://doi.org/10.1021/jp056409y
Autor:
John C. Traeger, Thomas Hellman Morton
Publikováno v:
The Journal of Physical Chemistry A. 109:10467-10473
Activation barriers (DeltaHMe(double dagger)) for adding methyl radicals to ions of the general formula CH3CR=OCH3+ have been measured by looking at the threshold energies for the reverse reaction, dissociative photoionization of ethers of the genera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5f6a7c35feb7fa266ad7adf68a82ec1
https://doi.org/10.1021/jp052790a
https://doi.org/10.1021/jp052790a
Autor:
Zoë A. Harvey, John C. Traeger
Publikováno v:
European Journal of Mass Spectrometry. 10:759-765
Photoionization mass spectrometry has been used to measure the CH2NH2+ appearance energies for six primary amines, resulting in a 298K heat of formation of 749.5 ± 1.3 kJ mol−1 for the methylenimmonium cation. An absolute proton affinity of 868.8
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c692599a9ef0357507d726dc3744a6d7
https://doi.org/10.1255/ejms.681
https://doi.org/10.1255/ejms.681
Autor:
John C. Traeger, Zoë A. Harvey
Publikováno v:
Journal of Mass Spectrometry. 39:802-807
The 298 K heat of formation for the propionyl cation (C2H5CO+) has been measured previously by dissociative photoionization mass spectrometry. However, recent theoretical and experimental studies involving methylketene suggest that this may be signif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::385fb979007f3ef481f491beab919700
https://doi.org/10.1002/jms.654
https://doi.org/10.1002/jms.654
Publikováno v:
International Journal of Mass Spectrometry. 217:23-44
A long-standing mystery in gas phase ion chemistry is: why are smaller fragments preferentially lost at low energies and larger fragments at higher energies in competing α-cleavages? This is addressed here by studies of dissociations of ethanol, 2-p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4cc97ef2ff9ca5b3b88b7b195bbb8d4c
https://doi.org/10.1016/s1387-3806(02)00529-8
https://doi.org/10.1016/s1387-3806(02)00529-8