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| Titel |
Reactions of H+(pyridine)m(H2O)n and H+(NH3)1(pyridine)m(H2O)n with NH3: experiments and kinetic modelling |
| VerfasserIn |
M. J. Ryding, Å. M. Jonsson, A. S. Zatula, P. U. Andersson, E. Uggerud |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 12, no. 6 ; Nr. 12, no. 6 (2012-03-16), S.2809-2822 |
| Datensatznummer |
250010938
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| Publikation (Nr.) |
 copernicus.org/acp-12-2809-2012.pdf |
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| Zusammenfassung |
| Reactions between pyridine containing water cluster ions,
H+(pyridine)1(H2O)n,
H+(pyridine)2(H2O)n and
H+(NH3)1(pyridine)1(H2O)n (n up to 15) with
NH3 have been studied experimentally using a quadrupole time-of-flight
mass spectrometer. The product ions in the reaction between
H+(pyridine)m(H2O)n (m = 1 to 2) and NH3 have
been determined for the first time. It is found that the reaction mainly
leads to cluster ions of the form
H+(NH3)1(pyridine)m(H2O)n-x, with x = 1 or 2
depending on the initial size of the reacting cluster ion. For a given number
of water molecules (from 5 to 15) in the cluster ion, rate coefficients are
found to be slightly lower than those for protonated pure water clusters
reacting with ammonia. The rate coefficients obtained from this study are
used in a kinetic cluster ion model under tropospheric conditions. The
disagreement between ambient ground level measurements and previous models
are discussed in relation to the results from our model and future
experimental directions are suggested. |
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