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Diastereoselective Fragmentation of Chiral alfa-Aminophosphonic Acids/Metal Ion aggregates (Articolo in rivista)

Type

Label

Diastereoselective Fragmentation of Chiral alfa-Aminophosphonic Acids/Metal Ion aggregates (Articolo in rivista) (literal)

Anno

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Alternative label

A. Filippi 1; M.Speranza 1; A. Paladini 2,3; R. De Carolis 2; A. Giardini 2,3; A. Lagana 2; M. Satta 4 (2006)
Diastereoselective Fragmentation of Chiral alfa-Aminophosphonic Acids/Metal Ion aggregates
in Journal of mass spectrometry (Print)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

A. Filippi 1; M.Speranza 1; A. Paladini 2,3; R. De Carolis 2; A. Giardini 2,3; A. Lagana 2; M. Satta 4 (literal)

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Rivista

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Note

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(1) Dipartimento di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Università di Roma La Sapienza, I-00185 Roma, Italy (2) Dipartimento di Chimica, Università di Roma La Sapienza, I-00185 Roma, Italy (3) CNR - IMIP, I-85050, Tito Scalo (Pz), Italy (4) CNR-ISC, Istituto dei Sistemi Complessi, I-00185 Roma, Italy (literal)

Titolo

Diastereoselective Fragmentation of Chiral alfa-Aminophosphonic Acids/Metal Ion aggregates (literal)

Abstract

Diastereomeric clusters of general formula [MAB2]+ and [MA2B]+ (M = Li.I/, Na(I), Ag(I), Ni(II)-H, or Cu(II)-H; A = .R/-(-)- and (S)-(+)-(1-aminopropyl)phosphonic acid; B = .1R)-(-)- and (1S)-(+)-(1-aminohexyl)phosphonic acid) have been readily generated in the electrospray ionization (ESI) source of a triple-quadrupole mass spectrometer and their collision-induced dissociation (CID) investigated. CID of diastereomeric complexes, e.g. [MAS(BS)2]+ and [MAR(BS/2]+, leads to fragmentation patterns characterized by Rhomo = [MASBS]+/[M(BS)2]+ and Rhetero = [MARBS]+/[M(BS/2]+ abundance ratios, which depend upon the relative stability of the diastereomeric [MASBS]+ and [MARBS]+ complexes in the gas phase. The chiral resolution factor Rchiral = Rhomo/Rhetero is found to depend not only on the nature of the M ion but also on that of the fragmenting species, whether [MAB2]+ or [MA2B]+. (literal)

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