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The photolysis of calcium, barium, strontium and lithium azides and the co-irradiated decomposition of calcium azide
Bibliography: p. 377-384.
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| Format: | Thesis |
| Language: | English |
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Department of Chemistry
2016
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| _version_ | 1867613151974916096 |
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| access_status_str | Open Access |
| author | O'Connor, Cyril Thomas |
| author2 | Prout, E G |
| author_browse | O'Connor, Cyril Thomas Prout, E G |
| author_facet | Prout, E G O'Connor, Cyril Thomas |
| author_sort | O'Connor, Cyril Thomas |
| collection | Thesis |
| description | Bibliography: p. 377-384. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/18116 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:31:35.974Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Chemistry |
| publisherStr | Department of Chemistry |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/18116 The photolysis of calcium, barium, strontium and lithium azides and the co-irradiated decomposition of calcium azide O'Connor, Cyril Thomas Prout, E G Chemistry Bibliography: p. 377-384. The effect of very high intensity ultraviolet radiation on powdered calcium, barium, strontium and lithium azides in the temperature range -80,0° - 35,0°C has been studied. Powdered and pelleted calcium azide was also irradiated with ultraviolet radiation in the temperature range 35,0° - 90,0°C and powdered lithium azide in the temperature range 24,0° - 170,0°C. All these decompositions were purely photolytic. Powdered and pelleted calcium azide was also subjected to ultraviolet radiation in the temperature range 110,0° - 140,0°C. This latter decomposition was termed co-irradiation due to the fact that both thermal and photolytic mechanisms were operative in this temperature range. Except at low temperatures, the extent of the decomposition was almost the same as that of a simple thermal decomposition. Kinetic analyses, determination of activation energies, studies of the dependence of reaction rates on light intensity, the effect of introducing water vapour to the sample at various stages of decomposition and the observance of the colour of the sample at various stages of reaction have been carried out. Analogous results were obtained for all four azides at low temperatures and the results obtained for calcium and lithium azides at ambient and higher temperatures were analogous to those obtained for barium and strontium azides under similar conditions by previous workers. During photolysis the activation energy undenvent transitions, in all four azides, in the region of 0°C and in the region of 60°C. Co-irradiation studies of calcium azide commenced at temperatures greater than 100°C. Similar studies were not carried out on lithium azide since even at temperatures in the region of 180°C the rate of photolytic decomposition was very much greater than that of a purely thermal decomposition at the same temperature. 2016-03-21T19:25:09Z 2016-03-21T19:25:09Z 1978 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/18116 eng application/pdf Department of Chemistry Faculty of Science University of Cape Town |
| spellingShingle | Chemistry O'Connor, Cyril Thomas The photolysis of calcium, barium, strontium and lithium azides and the co-irradiated decomposition of calcium azide |
| thesis_degree_str | Doctoral |
| title | The photolysis of calcium, barium, strontium and lithium azides and the co-irradiated decomposition of calcium azide |
| title_full | The photolysis of calcium, barium, strontium and lithium azides and the co-irradiated decomposition of calcium azide |
| title_fullStr | The photolysis of calcium, barium, strontium and lithium azides and the co-irradiated decomposition of calcium azide |
| title_full_unstemmed | The photolysis of calcium, barium, strontium and lithium azides and the co-irradiated decomposition of calcium azide |
| title_short | The photolysis of calcium, barium, strontium and lithium azides and the co-irradiated decomposition of calcium azide |
| title_sort | photolysis of calcium barium strontium and lithium azides and the co irradiated decomposition of calcium azide |
| topic | Chemistry |
| url | http://hdl.handle.net/11427/18116 |
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