Pyruvic acid proton and hydrogen transfer reactions in clusters
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F19%3A00500334" target="_blank" >RIV/61388955:_____/19:00500334 - isvavai.cz</a>
Result on the web
<a href="http://hdl.handle.net/11104/0292427" target="_blank" >http://hdl.handle.net/11104/0292427</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/C8CP07008C" target="_blank" >10.1039/C8CP07008C</a>
Alternative languages
Result language
angličtina
Original language name
Pyruvic acid proton and hydrogen transfer reactions in clusters
Original language description
We investigate ion chemistry in pyruvic acid (PA) clusters in a molecular beam experiment. We generate two types of species, isolated (PA)N clusters and clusters deposited on large water clusters (ice nanoparticles) (PA)N·(H2O)M, [M with combining macron] ≈ 390, and follow their chemistry after either 70 eV electron ionization (EI) or 193 nm UV photoionization (PI). In the (PA)N clusters, where the ionization starts with a PA molecule, both the EI and PI yield essentially the same ions: nominally (PA)nHk+, k = 1,2,3,…. Based on quantum chemical calculations, we suggest that several proton or hydrogen transfer reactions take place within a reaction cascade, with the hydrogen atoms stemming from other PA molecules. When a proton or hydrogen atom is transferred, the resulting [PA–H]˙ radical decomposes to CH3CO˙ and CO2 in an exothermic reaction. On the other hand, the EI and PI show entirely different patterns on nanoices: the EI proceeds mostly via water ionization yielding protonated water clusters (H2O)mH+ and, in most cases, PA molecules evaporate. The PI of pyruvic acid on nanoices exhibits essentially the same ion-chemistry as the ionization of (PA)N clusters, demonstrating also that the individually adsorbed PA molecules coagulate on nanoices. Our results show that ionized pyruvic acid might act both as donor and acceptor of protons or hydrogen atoms, with the proton/hydrogen donation being irreversible due to decomposition of the [PA–H]˙ radical.n
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GA17-04068S" target="_blank" >GA17-04068S: Molecular Clusters as Unique Nano-reactors: Controlling Chemistry with Photons and Electrons</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Chemistry Chemical Physics
ISSN
1463-9076
e-ISSN
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Volume of the periodical
21
Issue of the periodical within the volume
16
Country of publishing house
GB - UNITED KINGDOM
Number of pages
7
Pages from-to
8221-8227
UT code for WoS article
000465603200040
EID of the result in the Scopus database
2-s2.0-85064968442