Abstract
| Original language | English |
|---|---|
| Title of host publication | 62nd International Symposium of the American Vacuum Society |
| Publication status | Published - 21 Oct 2015 |
| Event | 62nd International Symposium and Exhibition of American Vacuum Society - San Jose, CA, United States Duration: 18 Oct 2015 → 23 Oct 2015 |
Conference
| Conference | 62nd International Symposium and Exhibition of American Vacuum Society |
|---|---|
| Abbreviated title | AVS 2015 |
| Country | United States |
| City | San Jose, CA |
| Period | 18/10/15 → 23/10/15 |
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Electronic Excitation Transport in Ices: A Key Role for Hydrogen Bonding. / Marchione, Demian; Abdulgalil, Ali Ghith Moussa; Collings, Mark P; McCoustra, Martin R S.
62nd International Symposium of the American Vacuum Society. 2015. SS+AS-WeA2.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Electronic Excitation Transport in Ices: A Key Role for Hydrogen Bonding
AU - Marchione, Demian
AU - Abdulgalil, Ali Ghith Moussa
AU - Collings, Mark P
AU - McCoustra, Martin R S
N1 - Title in conference programme: Confirming the role of Hydrogen Bonding in Electron-promoted Desorption at Water Ice Surfaces.
PY - 2015/10/21
Y1 - 2015/10/21
N2 - We have previously reported observations of large (>10^-16 cm2), low-energy (<500 eV), electron-promoted desorption cross-sections for benzene (C6H6) molecules adsorbed on the surface of amorphous solid water [1]. We will now report on the extension of this work to other molecular solids exhibiting varying degrees of hydrogen bonding within the molecular solid itself and between the solid surface and adsorbed benzene; specifically we have repeated our measurements employing substrates comprised of solid methanol (CH3OH) and diethyl ether (CH3CH2OCH2CH3). Our report will detail our studies of the structure of adsorbed layers of C6H6 on the molecular solids and demonstrate the crucial role of hydrogen bonding in propagating electronic excitation to the solid-vacuum interface where C6H6 desorption can occur. Competitive electron-promoted chemistry in the form of H2 formation will also be reported. Conclusions related to the impact of these observations on the early phase of icy interstellar grain chemistry will be discussed. [1] Highly efficient electron-stimulated desorption of benzene from amorphous solid water ice, J. D. Thrower, M. P. Collings, F. J. M. Rutten, and M. R. S. McCoustra, Chem. Phys. Lett., 2011, 505, 106–111.
AB - We have previously reported observations of large (>10^-16 cm2), low-energy (<500 eV), electron-promoted desorption cross-sections for benzene (C6H6) molecules adsorbed on the surface of amorphous solid water [1]. We will now report on the extension of this work to other molecular solids exhibiting varying degrees of hydrogen bonding within the molecular solid itself and between the solid surface and adsorbed benzene; specifically we have repeated our measurements employing substrates comprised of solid methanol (CH3OH) and diethyl ether (CH3CH2OCH2CH3). Our report will detail our studies of the structure of adsorbed layers of C6H6 on the molecular solids and demonstrate the crucial role of hydrogen bonding in propagating electronic excitation to the solid-vacuum interface where C6H6 desorption can occur. Competitive electron-promoted chemistry in the form of H2 formation will also be reported. Conclusions related to the impact of these observations on the early phase of icy interstellar grain chemistry will be discussed. [1] Highly efficient electron-stimulated desorption of benzene from amorphous solid water ice, J. D. Thrower, M. P. Collings, F. J. M. Rutten, and M. R. S. McCoustra, Chem. Phys. Lett., 2011, 505, 106–111.
M3 - Conference contribution
BT - 62nd International Symposium of the American Vacuum Society
ER -