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Analysis of mixed nitric oxide - Water clusters by complementary ionization methods

SYSNO ASEP	0476041
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Analysis of mixed nitric oxide - Water clusters by complementary ionization methods
Tvůrce(i)	Šmídová, Daniela (UFCH-W) Lengyel, Jozef (UFCH-W)_{RID, ORCID} Kočišek, Jaroslav (UFCH-W)_{RID, ORCID} Pysanenko, Andriy (UFCH-W)_{RID, ORCID} Fárník, Michal (UFCH-W)_{RID, ORCID}
Zdroj.dok.	International Journal of Mass Spectrometry. - : Elsevier - ISSN 1387-3806 Roč. 421, OCT 2017 (2017), s. 144-149
Poč.str.	6 s.
Jazyk dok.	eng - angličtina
Země vyd.	NL - Nizozemsko
Klíč. slova	Cluster mass spectrometry ; Atmospheric aerosols ; Electron attachment
Vědní obor RIV	CF - Fyzikální chemie a teoretická chemie
Obor OECD	Physical chemistry
CEP	GA17-04068S GA ČR - Grantová agentura ČR
Institucionální podpora	UFCH-W - RVO:61388955
UT WOS	000414114100016
EID SCOPUS	85023608247
DOI	10.1016/j.ijms.2017.06.012
Anotace	Mixed clusters of nitric oxide and water are investigated by mass spectrometry using different ionization methods, namely (1) the electron ionization at 70 eV (El), (2) the doping with sodium atoms and subsequent photoionization (NaPI), and (3) the low energy electron attachment (EA). All these methods applied to the same molecular beam generated by mixed NO-water expansion yield distinctly different mass spectra. The El spectra are dominated by the protonated water (H2O)(n)H+ ions, nevertheless, they show some evidence for the mixed NO-water clusters. The NaPI spectra exhibit only (H2O)(n).Na+ ions which originate from the pure water clusters (H2O)(N). The abundance of the pure water clusters generated in the mixed expansions is small compared to the abundance of the mixed species. The negative EA spectra clearly demonstrate the dominance of the mixed clusters, namely (H2O)(n).NO2- and (H2O)(n)center dot(NO)(m)(-), m =2, 3. None of the above mentioned methods alone can reveal the neutral cluster composition and size, however, based on their unique combination in our experiment, we can discuss the neutral clusters and ionization processes. In addition, we have investigated the negative ion intracluster chemistry by the theoretical calculations. Energetically favorable pathways from the (NO)(3)(-) ionic core to the NO2- in the presence of water are identified, justifying the generation of the (H2O)(n) center dot NO2- series. Further series in the negative ion spectra are discussed. (C) 2017 Elsevier B.V. All rights reserved.
Pracoviště	Ústav fyzikální chemie J.Heyrovského
Kontakt	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Rok sběru	2018

Počet záznamů: 1