Environmental and industrial systems have been investigated using vibrational spectroscopy. These applications were chosen to demonstrate the potential of vibrational spectroscopy as a means of obtaining molecular information from either in-situ or model environments in a rapid, convenient manner requiring minimal sample handling. Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) has been used to investigated two systems in the area of environmental chemistry. Using the characteristic CO stretching bands of the Mn(CO)$ sb3$ fragment, methylcyclopentadienyl manganese tricarbonyl (MMT), an additive to Canadian gasoline, was detected on soils treated with gasoline up to twelve months after exposure. Its longevity on and its interaction with different soils and various substrates was studied. A breakdown of the local symmetry of the manganese tricarbonly moiety suggests a Bronsted-type interaction between the soil and the carbonyl ligands of MMT. The uptake by harbour sediments of two tributyltin species used as marine antifouling agents, was also studied using DRIFTS. Water/sediments ratios and salinity were investigated as factors affecting adsorption. A novel infrared cell for probing the gas-phase infrared spectroscopy (HAGIS) cell was used to study the thermal decomposition products of ethylxanthanate-treated sulphide minerals and those of the related ethylxanthate metal complexes. The gas-phase decomposition products from sulphide minerals treated with ethylxante include $ rm CS sb2, COS, CO sb2, CH sb4, SO sb2,$ ethanol and possibly metal xanthates. The relative amounts of the products depend on the type of mineral surface, the temperature and the atmosphere in the cell. Iron, zinc, lead, nickel and copper ethylxanthate complexes were synthesized, and their thermal decomposition products were also studied by HAGIS. The complexes were classified according to the generation of the primary gas-phase decomposition products. Schemes for the produ
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.34477 |
| Date | January 1996 |
| Creators | Vreugdenhil, Andrew J. |
| Contributors | Butler, I. S. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy (Department of Chemistry.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001554827, proquestno: NQ30411, Theses scanned by UMI/ProQuest. |
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