Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Clathration by diol hosts : thermodynamics and structure
Inclusion properties of the following seven diol host compounds were investigated: Host 1 9,9'-bis(9,91-dihydroxy-fluorene) Host 2 1, 1'-binaphthyl-2,2'-bis( diphenylhydroxymethyl) Host 3 2,2'-bis(9-hydroxy-9-fluorenyl)biphenyl Host 4 trans-9, 10-dihydroxy-9,10-diphenyl-9, 10-dihydroanthracene Host...
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Chemistry
2016
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867614154377920512 |
|---|---|
| access_status_str | Open Access |
| author | Barbour, Leonard James |
| author2 | Nassimbeni, Luigi R |
| author_browse | Barbour, Leonard James Nassimbeni, Luigi R |
| author_facet | Nassimbeni, Luigi R Barbour, Leonard James |
| author_sort | Barbour, Leonard James |
| collection | Thesis |
| description | Inclusion properties of the following seven diol host compounds were investigated: Host 1 9,9'-bis(9,91-dihydroxy-fluorene) Host 2 1, 1'-binaphthyl-2,2'-bis( diphenylhydroxymethyl) Host 3 2,2'-bis(9-hydroxy-9-fluorenyl)biphenyl Host 4 trans-9, 10-dihydroxy-9,10-diphenyl-9, 10-dihydroanthracene Host 5 trans-9, 10-dihydroxy-9,10-di-p-tolyl-9,10-dihydroanthracene Host 6 trans-9, 10-dihydroxy-9, 10-di-p-tert-butylphenyl-9, 10-dihydroanthracene Host 7 trans-9, 10-dihydroxy-9, 10-di-a-naphthyl-9, 10-dihydroanthracene These compounds all possess molecular planes with bulky substituents and opposing hydroxyl moieties as probes for possible coordination to guest molecules by means of hydrogen bonding. Sixteen different inclusion compounds were formed with common organic solvents as the guests. Various characterisation techniques were used and the crystal structures of the inclusion compounds and of the a-phases of Hosts 2 and 5 were elucidated using single crystal X-ray diffraction methods. Thermal decomposition studies using thermogravimetry and differential scanning calorimetry (DSC) were carried out in order to relate the strength of the host-guest interactions to the structures of the inclusion compounds. Owing to practical limitations, the DSC technique is not suitable for the measurement of '1H for the decomposition of an inclusion compound where the guest is relatively volatile. Therefore an apparatus was devised to yield accurate '1H0 values for this process. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/21427 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:47:31.986Z |
| 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:11427/21427 Clathration by diol hosts : thermodynamics and structure Barbour, Leonard James Nassimbeni, Luigi R Chemistry Inclusion properties of the following seven diol host compounds were investigated: Host 1 9,9'-bis(9,91-dihydroxy-fluorene) Host 2 1, 1'-binaphthyl-2,2'-bis( diphenylhydroxymethyl) Host 3 2,2'-bis(9-hydroxy-9-fluorenyl)biphenyl Host 4 trans-9, 10-dihydroxy-9,10-diphenyl-9, 10-dihydroanthracene Host 5 trans-9, 10-dihydroxy-9,10-di-p-tolyl-9,10-dihydroanthracene Host 6 trans-9, 10-dihydroxy-9, 10-di-p-tert-butylphenyl-9, 10-dihydroanthracene Host 7 trans-9, 10-dihydroxy-9, 10-di-a-naphthyl-9, 10-dihydroanthracene These compounds all possess molecular planes with bulky substituents and opposing hydroxyl moieties as probes for possible coordination to guest molecules by means of hydrogen bonding. Sixteen different inclusion compounds were formed with common organic solvents as the guests. Various characterisation techniques were used and the crystal structures of the inclusion compounds and of the a-phases of Hosts 2 and 5 were elucidated using single crystal X-ray diffraction methods. Thermal decomposition studies using thermogravimetry and differential scanning calorimetry (DSC) were carried out in order to relate the strength of the host-guest interactions to the structures of the inclusion compounds. Owing to practical limitations, the DSC technique is not suitable for the measurement of '1H for the decomposition of an inclusion compound where the guest is relatively volatile. Therefore an apparatus was devised to yield accurate '1H0 values for this process. 2016-08-22T12:26:10Z 2016-08-22T12:26:10Z 1994 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/21427 eng application/pdf Department of Chemistry Faculty of Science University of Cape Town |
| spellingShingle | Chemistry Barbour, Leonard James Clathration by diol hosts : thermodynamics and structure |
| thesis_degree_str | Doctoral |
| title | Clathration by diol hosts : thermodynamics and structure |
| title_full | Clathration by diol hosts : thermodynamics and structure |
| title_fullStr | Clathration by diol hosts : thermodynamics and structure |
| title_full_unstemmed | Clathration by diol hosts : thermodynamics and structure |
| title_short | Clathration by diol hosts : thermodynamics and structure |
| title_sort | clathration by diol hosts thermodynamics and structure |
| topic | Chemistry |
| url | http://hdl.handle.net/11427/21427 |
| work_keys_str_mv | AT barbourleonardjames clathrationbydiolhoststhermodynamicsandstructure |