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Formation by fast atom bombardment of molecular radical cations by electron donor–acceptor complexes from tosylated amino acid esters
Author(s) -
Athanassopoulos Constantions,
Papaioannou Dionissios,
Napoli Anna,
Siciliano Carlo,
Sindona Giovanni
Publication year - 1995
Publication title -
journal of mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 1076-5174
DOI - 10.1002/jms.1190300912
Subject(s) - chemistry , fast atom bombardment , photochemistry , electron acceptor , ionization , electron donor , mass spectrum , ion , radical ion , matrix isolation , alkyl , ionization energy , medicinal chemistry , acceptor , organic chemistry , molecule , catalysis , physics , condensed matter physics
N ‐Alkyl‐ N ‐tosyl amino acid esters were ionized by fast atom bombardment (FAB) in a nitrobenzyl alcohol matrix through oxidative processes leading to molecular radical cations (M +· ). The addition to the matrix of Cu 11 salts induces the ionization through proton attachment whereby [M + H] + are exclusively displayed by the positive‐ion FAB spectra. The formation of electron donor–acceptor complexes between the analytes and the matrix lowers the critical energy for the ionization by one‐electron removal from the substrates.