OXYGEN AND SULFUR AS LIGANDS IN GAS PHASE TRANSITION METAL ION CHEMISTRY: AN FTMS STUDY (FOURIER TRANSFORM MASS SPECTROMETRY, ION-MOLECULE REACTIONS)
Abstract
Gas phase chemistry of transition metal ion-ligand complexes has been investigated using Fourier transform mass spectrometry (FTMS). Pulsed valve introduction of reagent gases to generate metal ion-ligand complexes was used to simplify the chemistry studied. The techniques used for determining ion structures include collision-induced dissociation (CID), ion-molecule reactions and photodissociation. The reactions of FeO('+) with small hydrocarbons are outlined. The presence of the oxygen ligand greatly changes the chemistry of the metal ion, and differences in reaction with saturated and unsaturated compounds are explored. Oxygen is also explored as a ligand for all three Groups 8-10 metal ions, Fe('+), Co('+) and Ni('+), as well as V('+). Sulfur was used as a ligand to explore its difference from oxygen. Similarities between sulfur and oxygen as ligands are noted, and metal ion-sulfur bond dissociation energies are determined for FeS('+), CoS('+) and NiS('+) by photodissociation. Metal ions also exhibit unusual reaction chemistry with ethylene sulfide, generating metal polysulfide cluster ions. The structure of these ions is explored by a variety of techniques.
Degree
Ph.D.
Subject Area
Analytical chemistry
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