Internal energy distribution in electrospray ionization.
Internal energies and energy distributions were studied using the 'survival yield' method developed previously. In addition to conventional benzylpyridinium salts, protonated esters (fragmenting by rearrangement) and protonated leucine enkephalin were also used, extending the validity of the technique. Fragmentation processes were studied in the cone voltage region and modeled by the RRKM-based MassKinetics program. The results show that the shapes of the energy distributions are similar to thermal distributions. The mean internal energies are very similar for all compound classes studied, and show a linear increase with collision energy in the 10-50 eV region.
Naban-Maillet
Jessie
J
Synthèse, Structure et Fonction de Molécules Bioactives, CNRS-UMR 7613, 4 place Jussieu, 75252 Paris cedex 05, France.
Lesage
Denis
D
Bossée
Anne
A
Gimbert
Yves
Y
Sztáray
Judit
J
Vékey
Károly
K
Tabet
Jean-Claude
JC
D004735:Energy Transfer; D004743:Enkephalin, Leucine / Q000032:analysis* / Q000737:chemistry; D004952:Esters / Q000737:chemistry; D007700:Kinetics; D008962:Models, Theoretical; D011522:Protons; D011726:Pyridinium Compounds / Q000032:analysis* / Q000737:chemistry; D012984:Software; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
D004952:Esters; D011522:Protons; D011726:Pyridinium Compounds; D004743:Enkephalin, Leucine