Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Paul O. Momoh"'
Publikováno v:
The Journal of Physical Chemistry Letters. 2:2412-2419
Here, we report ion mobility experiments and theoretical studies aimed at elucidating the identity of the C8H8•+ ion formed by electron impact ionization of neutral acetylene clusters. The ion dissociates by a dominant low-energy channel involving
Publikováno v:
International Journal of Mass Spectrometry. 300:81-90
The present study explores the feasibility of utilizing acetylene clusters as model reactors for screening the catalytic activity of transition metal ions towards the polymerization of acetylene. Laser vaporization/ionization is used to generate atom
Publikováno v:
The Journal of Physical Chemistry A. 112:6066-6073
Reactions of the acetylene radical cation (C2H2(+*)) with H2O were investigated using ion mobility mass spectrometry. The primary products are the C2H3O(+) and C2H4O(+*) ions, produced with an overall rate coefficient k(300 K) = 2(+/-0.6) x 10(-11) c
Autor:
M. Samy El-Shall, Paul O. Momoh
Publikováno v:
Chemical Physics Letters. 436:25-29
We report the thermochemistry of the stepwise hydration of the acetylene trimer ion ( C 2 H 2 ) 3 + using the drift tube technique. The binding energies and entropy changes for the addition of 1–7 water molecules to ( C 2 H 2 ) 3 + are identical to
Autor:
Samuel A. Abrash, Paul O. Momoh, John M. Pinski, Isaac K. Attah, Rene P.F. Kanters, M. Samy El-Shall
Publikováno v:
The journal of physical chemistry. A. 118(37)
Here we report a detailed study aimed at elucidating the mechanism of intracluster ionic polymerization following the electron impact ionization of van der Waals clusters of ethynylbenzene (C8H6)n generated by a supersonic beam expansion. The structu
Publikováno v:
Journal of the American Chemical Society. 135(1)
Here, we present evidence from laboratory experiments for the formation of nitrogen-containing complex organic ions by sequential reactions of acetylene with the pyridinium and pyrimidinium ions in the gas phase and within ionized pyridine-acetylene
Autor:
Paul O. Momoh, M. Samy El-Shall, Abdel-Rahman Soliman, Samuel A. Abrash, Lauren Gallagher, Danielle Taylor, Ahmed M. Hamid
Publikováno v:
The journal of physical chemistry. A. 116(36)
In this paper, we report a study on the reactivity of the phenylium ion with acetylene, by measuring product yield as a function of pressure and temperature using mass-selected ion mobility mass spectrometry. The reactivity is dominated by a rapid se
Autor:
Edreese H. Alsharaeh, Paul O. Momoh, Yehia M. Ibrahim, M. Samy El-Shall, Enli Xie, Ridha Mabrouki
Publikováno v:
The journal of physical chemistry. A. 112(6)
The application of ion mobility to separate the electronic states of first-, second-, and third-row transition metal cations generated by the laser vaporization/ionization (LVI) technique is presented. The mobility measurements for most of the laser-
Publikováno v:
Journal of the American Chemical Society. 128(38)
Since the discovery of acetylene and benzene in protoplanetary nebulae under powerful ultraviolet ionizing radiation, efforts have been made to investigate the polymerization of ionized acetylene. Here we report the efficient formation of benzene ion
Publikováno v:
Journal of the American Chemical Society. 130:12848-12849
We present direct evidence for low temperature associative charge transfer (ACT) reactions of acetylene onto the benzene cation that catalyze the conversion of acetylene molecules into polymerized cations and for high temperature addition/elimination