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001-es BibID:	BIBFORM016383
Első szerző:	Kuki Ákos (villamosmérnök)
Cím:	Energy-dependent collision-induced dissociation of lithiated polytetrahydrofuran : Effect of the size on the fragmentation properties / Ákos Kuki, Lajos Nagy, Antony Memboeuf, László Drahos, Károly Vékey, Miklós Zsuga, Sándor Kéki
Dátum:	2010
ISSN:	1044-0305
Megjegyzések:	The fragmentation properties of singly and doubly lithiated polytetrahydrofuran (PTHF) were studied using energy-dependent collision-induced dissociation. The product ion spectrum of [PTHF+Li]+ showed the formation of three different series corresponding to product ions with hydroxyl, aldehyde and vinyl end-groups. Interestingly, besides these series, two additional, non-lithiated product ions C4H9O+ and C4H7+ were identified in the MS/MS spectra. The MS/MS of the doubly lithiated PTHF ([PTHF+2Li]2+) with a number of repeat units ranging from 8 to 27 showed the formation of product ions similar to those of the singly lithiated series, however, doubly lithiated product ions and product ions formed by the loss of one Li+-ion from the precursor ion also appeared with significant abundances. Analysis of the breakdown curves for the singly and doubly charged PTHF indicated that the series A ions are formed most probably together with the series B ions, while members of the series C ions appeared at significantly higher collision energies. The fragmentation properties of [PTHF+Li]+ and [PTHF+2Li]2+ were also interpreted using the survival yield method. It was found that the collision energy/voltage necessary to obtain 50% fragmentation (CV50) was dependent linearly on the number of the repeat units, i.e., on the size, or the number of degrees of freedom (DOF).
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Journal Of The American Society For Mass Spectrometry. - 21 : 10 (2010), p. 1753-1761. -
További szerzők:	Nagy Lajos (1979-) (vegyész) Memboeuf, Antony Drahos László Vékey Károly Zsuga Miklós (1944-) (polimer kémikus) Kéki Sándor (1964-) (polimer kémikus)
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