Program

Poster Presentations

Day 1, May 15（Tue.）　　Poster

1P-45　　PDF

Temperature-Resolved Proton Transfer Reactions of Peptide Ions

(Yokohama City Univ.)
^oShinji Nonose, Hayato Sasaoka, Yu Usui, Hoshiyuri Oji, Mizuki Higashihara

Temperature-resolved proton transfer reactions of peptide ions, [M + ^zH]^z+, to 1,4-butanediamine were examined in the gas phase. Absolute reaction rate constants for proton transfer were determined from intensities of precursor and product ions in the mass spectra. With changes of thermal temperature, and of direct current voltage to put octapole ion guide of the collision cell, remarkable change was observed for distribution of product ions and reaction rate constants. The results indicate that conformation changes on [M + ^zH]^z+ at lower temperature range, which relate with complex formation. An issue that is attracting considerable attention is their conformations might resemble structural evolution that originated from temperature in the gas phase.