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001-es BibID:	BIBFORM023373
Első szerző:	Kéki Sándor (polimer kémikus)
Cím:	Cationization of simple organic molecules by singly-charged Ag3+ cluster ions in matrix-assisted laser desorption/ionization mass spectrometry: Metal cluster-molecule interactions / Sándor Kéki, Lajos Nagy, György Deák, Miklós Zsuga, László Somogyi, Albert Lévai
Dátum:	2004
Megjegyzések:	It was found earlier that under matrix-assisted laser desorption/ionization (MALDI) conditions several organic compounds which produce adduct with silver ions, are also capable of forming adducts with Ag3+ cluster ions under appropriate conditions. The Ag3+ cluster ion can be in situ generated under the MALDI analysis conditions from silver trifluoroacetate cationization agent in the presence of organic MALDI matrices. In this article the fragmentation of a commercial plasticizer, a peracetylated isoflavone glycoside and a pyrazolylphenyl disulfide derivative cationized with silver ions and Ag3+ cluster ions are compared. It was observed that the complexes of Ag3+ are less fragmented than the corresponding adduct ions with Ag+. The presumable fragmentation channel of [M + Ag3+] is the elimination of Ag2 units from these complexes. No significant dissociation of [M + Ag3+], into M and Ag3+ takes place, indicating a tight connection between the corresponding molecule and Ag3+ cluster ion. However, with a compound carrying very labile groups, such as the pyrazolylphenyl disulfide derivative, intramolecular cleavages can occur prior to significant dissociation of the Ag3+ cluster ion.
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Journal of The American Society for Mass Spectrometry. - 15 : 6 (2004), p. 879-883. -
További szerzők:	Nagy Lajos (1979-) (vegyész) Deák György (1954-) (polimer kémikus) Zsuga Miklós (1944-) (polimer kémikus) Somogyi László (1928-) (vegyész) Lévai Albert (1941-) (kémikus)
Pályázati támogatás:	T 025016, T 037201, T 037448, T 042740, M 28369, M 36872, MU-00204/2001 OTKA
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