I. FUNDAMENTAL PROPERTIES AND REACTIONS OF ATOMIC METAL IONS IN THE GAS PHASE. II. LOW ENERGY COLLISION SPECTROSCOPY USING FOURIER TRANSFORM MASS SPECTROMETRY
Abstract
The present work lays the foundation for the understanding and evaluation of atomic metal ions as a new class of chemical ionization reagents. In particular, a pulsed laser has been used in conjunction with an ion cyclotron resonance spectrometer to generate and study the gas phase ion-molecule reactions of Cu('+), Fe('+), Ti('+), and other metal ion containing species with simple organic compounds. Definite patterns of reactivity for different classes of oxygenated and hydrocarbon compounds are observed which, together with an understanding of the reaction mechanisms, provide the basis for predicting CI mass spectra of new compounds with analogous functional groups. Collision-induced dissociation is demonstrated on a number of primary and secondary ions using a Fourier transform mass spectrometer. Collision induced dissociation using FT/MS is a relatively low energy and efficient process with the ability to study a wide range of ion-molecule reaction products as exemplified by results on proton bound dimers and transition metal containing ionic species. Variation of collision energy by varying the RF irradiation level can provide information about product distribution as a function of energy, ion structural information, and potential energy surface profiles.
Degree
Ph.D.
Subject Area
Analytical chemistry
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