ELECTRON-IMPACT EXCITATION OF IONS FROM ORGANICS - ALTERNATIVE TO COLLISION-INDUCED DISSOCIATION

A technique has been developed for electron Impact excitation of ions from organics (EIEIO). The technique uses trapped ion cyclotron resonance (ICR) spectroscopy and together with the ICR photochemical techniques and unusual capabilities for studying ion-molecule reactions, will aid In the evolution of ICR as an analytical instrument. It is demonstrated on a variety of substituted benzene radical cations. Ions are generated and subsequently excited in a continuous electron beam while being trapped in the source region. The spectra obtained by EIEIO are shown to be analogous to those obtained by collision induced dissociation and yield characteristic structural information. © 1979, American Chemical Society. All rights reserved.