Zwitterionic clusters with dianion core produced by electrospray ionisation of Brønsted acidic ionic liquids

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Details zur Publikation

Autor(en): Li J, Nye L, Schulz P, Wasserscheid P, Ivanovic-Burmazovic I, Drewello T, Wei W
Zeitschrift: Physical Chemistry Chemical Physics
Verlag: Royal Society of Chemistry
Jahr der Veröffentlichung: 2012
Band: 14
Heftnummer: 15
Seitenbereich: 5115-5121
ISSN: 1463-9076
eISSN: 1463-9084


Abstract


New Brønsted acidic ionic liquids (BAILs) are prepared by treating zwitterions, which are composed of an imidazolium cation and a sulfonate anion, with an alkanedisulfonic acid. Acidification of the zwitterions produces the cation and deprotonation of the alkanedisulfonic acid forms the anion of the new BAILs. Direct laser desorption/ionisation (LDI), matrix-assisted LDI (MALDI) and electrospray ionisation (ESI) are employed to transfer ions into the gas-phase for detection by mass spectrometry and for dissociation studies by tandem mass spectrometry. The components of the BAILs are confirmed by LDI and MALDI by the detection of the respective cation and anion and by ESI by the observation of the cation and the dianion. A prominent feature of ESI is the formation of aggregates (cluster ions). Positively charged cluster ions are formally composed of multiple zwitterions plus one additional proton. In the negative-ion mode the clusters also incorporate the zwitterions which are, however, linked with the alkanedisulfonate dianion. In collision-induced dissociations (CID), the cationic aggregates show the evaporation of zwitterions until the protonated zwitterion is reached. Similarly, the cluster dianions release zwitterions until the free alkane disulfonate dianion is reached. However, the 1:1 adduct of dianion and zwitterion also displays proton transfer and Coulomb explosion into the mono-protonated disulfonic mono-anion and an imidazole-based carbene with sulfonate mono-anion. © 2012 the Owner Societies.



FAU-Autoren / FAU-Herausgeber

Drewello, Thomas Prof. Dr.
Professur für Physikalische Chemie
Ivanovic-Burmazovic, Ivana Prof. Dr.
Lehrstuhl für Bioanorganische Chemie
Li, Jing
Sonderforschungsbereich 953/2 Synthetische Kohlenstoffallotrope
Nye, Leanne
Sonderforschungsbereich 583 Redoxative Metallkomplexe - Reaktivitätssteuerung durch molekulare Architekturen (Sprecher: Prof.Dr.Kisch)
Schulz, Peter Dr.
Lehrstuhl für Chemische Reaktionstechnik
Wasserscheid, Peter Prof. Dr.
Lehrstuhl für Chemische Reaktionstechnik
Wei, Wei
Lehrstuhl für Chemische Reaktionstechnik


Zitierweisen

APA:
Li, J., Nye, L., Schulz, P., Wasserscheid, P., Ivanovic-Burmazovic, I., Drewello, T., & Wei, W. (2012). Zwitterionic clusters with dianion core produced by electrospray ionisation of Brønsted acidic ionic liquids. Physical Chemistry Chemical Physics, 14(15), 5115-5121. https://dx.doi.org/10.1039/c2cp24071h

MLA:
Li, Jing, et al. "Zwitterionic clusters with dianion core produced by electrospray ionisation of Brønsted acidic ionic liquids." Physical Chemistry Chemical Physics 14.15 (2012): 5115-5121.

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Zuletzt aktualisiert 2018-10-08 um 02:14