Charge Transfer and Metastable Ion Dissociation of Multiply Charged Molecular Cations Observed by Using Reflectron Time-of-Flight Mass Spectrometry.

The front cover artwork is provided by the group of Prof. Tomoyuki Yatsuhashi (Osaka City University) as well as Dr. Akimasa Fujihara (Osaka Prefecture University).

Charge Transfer and Metastable Ion Dissociation of Multiply Charged Molecular Cations Observed by Using Reflectron Time-of-Flight Mass Spectrometry.

A multiply charged molecule expands the range of a mass window and is utilized as a precursor to provide rich sequence coverage; however, reflectron time-of-flight mass spectrometer has not been well applied to the product ion analysis of multiply charged precursor ions. Here, we demonstrate that the range of the mass-to-charge ratio of measurable product ions is limited in the cases of multiply charged precursor ions. We choose C F as a model molecule to investigate the reactions of multiply charged molecular cations formed in intense femtosecond laser fields.

Selection of a Single Isotope of Multiply Charged Xenon ( Xe , A=128-136, z=1-6) by Using a Bradbury-Nielsen Ion Gate.

The inclusion of an ion gate in a tandem mass spectrometer allows a specific precursor ion to be selected, and the fragment ions are then used for structure analysis and to investigate chemical reactions. However, the performance of an ion gate has been judged simply by whether or not the target ion was selected. In this study, we designed, manufactured, constructed, and characterized a Bradbury-Nielsen ion gate (BNG).