The formation of cyanoborate liquid clathrates with water or cresol as promoters

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dc.contributor.advisorHunter, Rogeren_ZA
dc.contributor.advisorLinder, Peter Wen_ZA
dc.contributor.authorDavis, Bridgit Helenen_ZA
dc.date.accessioned2016-04-07T14:40:31Z
dc.date.available2016-04-07T14:40:31Z
dc.date.issued1996en_ZA
dc.description.abstractIf host and guest components form a liquid clathrate only when a third component is present, the third component is a promoter of liquid clathrate formation. The importance of promoters was verified by promoting liquid clathrate formation in guest-host combinations which do not form liquid clathrates without a promoter. The validity of the conventional definition of liquid clathrates was probed with respect to the absence of host in the excess guest layer and with respect to the fixed maximum guest to host ratio. A model which allows for the effect of promoters on liquid clathrates was proposed. The II electron rich nature of the guest is important in the model, so the guests, furan, thiophene and benzene, were used to probe the dependence of cyanoborate liquid clathrate formation on the IT electron rich nature of the guest. Differences in the electronic nature of the promoters, water and cresol, caused differences in the ease of promoting cyanoborate liquid clathrate formation, in the stability and composition of the liquid clathrates formed, and in the interactions between the promoter and the components of the liquid clathrate (host anion, host cation and guest). In promoting liquid clathrate formation, the promoter separated the host cation-anion pairs so that the guest interacted favourably with the host cation. The guest to host ratio was dependent on the amount of promoter present in the liquid clathrate, and favourable interactions of the promoter with liquid clathrate components caused the liquid clathrate to expand as it accommodated increased amounts of promoter and guest. Favourable interaction of the promoter with the components of the liquid clathrate compensated for the energy required to separate the host cation-anion pairs.en_ZA
dc.identifier.apacitationDavis, B. H. (1996). <i>The formation of cyanoborate liquid clathrates with water or cresol as promoters</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Chemistry. Retrieved from http://hdl.handle.net/11427/18710en_ZA
dc.identifier.chicagocitationDavis, Bridgit Helen. <i>"The formation of cyanoborate liquid clathrates with water or cresol as promoters."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Chemistry, 1996. http://hdl.handle.net/11427/18710en_ZA
dc.identifier.citationDavis, B. 1996. The formation of cyanoborate liquid clathrates with water or cresol as promoters. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Davis, Bridgit Helen AB - If host and guest components form a liquid clathrate only when a third component is present, the third component is a promoter of liquid clathrate formation. The importance of promoters was verified by promoting liquid clathrate formation in guest-host combinations which do not form liquid clathrates without a promoter. The validity of the conventional definition of liquid clathrates was probed with respect to the absence of host in the excess guest layer and with respect to the fixed maximum guest to host ratio. A model which allows for the effect of promoters on liquid clathrates was proposed. The II electron rich nature of the guest is important in the model, so the guests, furan, thiophene and benzene, were used to probe the dependence of cyanoborate liquid clathrate formation on the IT electron rich nature of the guest. Differences in the electronic nature of the promoters, water and cresol, caused differences in the ease of promoting cyanoborate liquid clathrate formation, in the stability and composition of the liquid clathrates formed, and in the interactions between the promoter and the components of the liquid clathrate (host anion, host cation and guest). In promoting liquid clathrate formation, the promoter separated the host cation-anion pairs so that the guest interacted favourably with the host cation. The guest to host ratio was dependent on the amount of promoter present in the liquid clathrate, and favourable interactions of the promoter with liquid clathrate components caused the liquid clathrate to expand as it accommodated increased amounts of promoter and guest. Favourable interaction of the promoter with the components of the liquid clathrate compensated for the energy required to separate the host cation-anion pairs. DA - 1996 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1996 T1 - The formation of cyanoborate liquid clathrates with water or cresol as promoters TI - The formation of cyanoborate liquid clathrates with water or cresol as promoters UR - http://hdl.handle.net/11427/18710 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/18710
dc.identifier.vancouvercitationDavis BH. The formation of cyanoborate liquid clathrates with water or cresol as promoters. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Chemistry, 1996 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18710en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemistryen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherChemistryen_ZA
dc.titleThe formation of cyanoborate liquid clathrates with water or cresol as promotersen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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