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Reactions of hydrated aluminum ions with methanol and formic acid

Reactions of hydrated aluminum ions with methanol and formic acid
Reactions of hydrated aluminum ions with methanol and formic acid
The reactions of hydrated aluminum ions Al(H2O)(n)(+), 20<n<60, with methanol and formic acid were investigated using Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry. Besides black body radiation and collisionally induced fragmentation, also efficient ligand transfer processes as well as an intracluster oxidation of the aluminum take place. While in pure Al(H2O)(n)(+) ions this reaction, where the Al+ is oxidized to Al3+ and water reduced to yield molecular H-2, proceeds only in a limited size range of 11<n<24. Addition of formic acid, similar to the previously studied addition of 110, removes the upper limit, but the reactions proceed more slowly. With methanol, the upper limit remains, but it is shifted to higher values of n. These observations are consistent with our previously proposed "acid catalyzed", concerted proton transfer mechanism, with the efficiency of the reaction being highest in the presence of 110, and decreasing with the decreasing acidities of formic acid and methanol.
hydrated aluminum ion, methanol, formic acid, redox reactions, hydrogen, formation, protonated water clusters, ab-initio mo, intracluster reactions, methyl-chloride, explicit consideration, blackbody radiation, chemical-reactivity, molecular-dynamics, hydrogen-chloride, gas-phase
1387-3806
331-341
Balaj, O. Petru
72879136-c507-4b38-b7f6-723d78174bda
Lee, Edmond P.F.
f47c6d5d-2d1f-4f03-a3ff-03658812d80b
Balteanu, Iulia
1f425f97-f004-42a9-af47-92cbf6d5662a
Fox, Brigitte S.
4cd354b6-37c7-4ce2-bc90-f53758490a04
Beyer, Martin K.
278d496e-d0ce-4e9a-ac70-55abfe779bec
Dyke, John M.
46393b45-6694-46f3-af20-d7369d26199f
Bondybey, Vladimir E.
accdfcd8-2c76-4ca7-9cab-d94bbc526767
Balaj, O. Petru
72879136-c507-4b38-b7f6-723d78174bda
Lee, Edmond P.F.
f47c6d5d-2d1f-4f03-a3ff-03658812d80b
Balteanu, Iulia
1f425f97-f004-42a9-af47-92cbf6d5662a
Fox, Brigitte S.
4cd354b6-37c7-4ce2-bc90-f53758490a04
Beyer, Martin K.
278d496e-d0ce-4e9a-ac70-55abfe779bec
Dyke, John M.
46393b45-6694-46f3-af20-d7369d26199f
Bondybey, Vladimir E.
accdfcd8-2c76-4ca7-9cab-d94bbc526767

Balaj, O. Petru, Lee, Edmond P.F., Balteanu, Iulia, Fox, Brigitte S., Beyer, Martin K., Dyke, John M. and Bondybey, Vladimir E. (2002) Reactions of hydrated aluminum ions with methanol and formic acid. International Journal of Mass Spectrometry, 220 (2), 331-341. (doi:10.1016/S1387-3806(02)00686-3).

Record type: Article

Abstract

The reactions of hydrated aluminum ions Al(H2O)(n)(+), 20<n<60, with methanol and formic acid were investigated using Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry. Besides black body radiation and collisionally induced fragmentation, also efficient ligand transfer processes as well as an intracluster oxidation of the aluminum take place. While in pure Al(H2O)(n)(+) ions this reaction, where the Al+ is oxidized to Al3+ and water reduced to yield molecular H-2, proceeds only in a limited size range of 11<n<24. Addition of formic acid, similar to the previously studied addition of 110, removes the upper limit, but the reactions proceed more slowly. With methanol, the upper limit remains, but it is shifted to higher values of n. These observations are consistent with our previously proposed "acid catalyzed", concerted proton transfer mechanism, with the efficiency of the reaction being highest in the presence of 110, and decreasing with the decreasing acidities of formic acid and methanol.

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More information

Published date: 1 October 2002
Keywords: hydrated aluminum ion, methanol, formic acid, redox reactions, hydrogen, formation, protonated water clusters, ab-initio mo, intracluster reactions, methyl-chloride, explicit consideration, blackbody radiation, chemical-reactivity, molecular-dynamics, hydrogen-chloride, gas-phase

Identifiers

Local EPrints ID: 19661
URI: http://eprints.soton.ac.uk/id/eprint/19661
ISSN: 1387-3806
PURE UUID: d06421ca-f7ad-470c-95e3-e01f795a3d27
ORCID for John M. Dyke: ORCID iD orcid.org/0000-0002-9808-303X

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Date deposited: 16 Feb 2006
Last modified: 20 Jul 2019 01:27

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Contributors

Author: O. Petru Balaj
Author: Edmond P.F. Lee
Author: Iulia Balteanu
Author: Brigitte S. Fox
Author: Martin K. Beyer
Author: John M. Dyke ORCID iD
Author: Vladimir E. Bondybey

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