Estimation of the Noncovalent Bond Dissociation Energies of the Gas-Phase Complexes of macrocyclic Polyethers with Alkali Metal Cations Using an Electrospray Ionization/Triple Quadrupole Mass Spectrometer

• Autorzy: Danikiewicz W. , Tarnowski P. , Bieńkowski T. , Jurczak J.
• Języki publikacji: EN

Abstrakty

EN

An attempt to use the commercial triple quadrupole mass spectrometer, equipped with an electrospray ion source, to estimate the noncovalent bond dissociation energies of gas-phase complexes of macrocyclic polyethers with metal cations has been made. It was found that, after standardization of the experimental conditions, the collision cell voltage required for decomposition of 50% of the selected complex ions (CE50%) is proportional to the binding energies with reasonable accuracy. Even better correlation was obtained after recalculation of the CE50% values to the center-of-mass frame (ECM50%). Measurements were made for 12-crown-4, 15-crown-5, 18-crown-6, and dibenzo-18-crown-6 complexes with alkali metal cations from Li+ to Cs+ . These results indicate, that it is possible to estimate values of the binding energies after correct setting of the experimental conditions and using model compounds as the reference.

Słowa kluczowe

EN

macrocyclic polyethers; complex ions; electrospray mass spectrometry; noncovalent bond energy

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2004
• Tom: Vol. 78 / nr 5
• Strony: 699--709
• Opis fizyczny: Bibliogr. 29 poz., rys.

Twórcy

autor

Danikiewicz W.

• Institute of Organic Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warsaw, Poland

autor

Tarnowski P.

• Institute of Organic Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warsaw, Poland

autor

Bieńkowski T.

• Institute of Organic Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warsaw, Poland

autor

Jurczak J.

• Institute of Organic Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warsaw, Poland
• Faculty of Chemistry, Warsaw University, ul. Pasteura 1, 02-093 Warsaw, Poland

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