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Organic clathrates: structure and reactivity
Author(s)
Nohako, Kanyisa L.
Date Issued
2009
Type
Thesis
Publisher
Cape Peninsula University of Technology
Abstract
The host compound 9-(4-methoxyphenyl)-9H-xanthen-9-01 (AI) forms inclusion
compounds with the solid guests l -naphthylamine (NAPH), 8-hydroxyquinoline (HQ).
acridine (ACRI), 1,4 - diazabicyclo[2.2.2]octane (DABCO) and a liquid guest
benzaldehyde (BENZAL). All four structures AI·YzNAPH, AI· Y,HQ AI·ACRI and
AI ·Y,DABCO were successfully solved in the triclinic space group P I . The structure of
AI·Y,BENZAL was successfully solved in the monocl inic space group P2dn . Similar
packin g motifs arise for the NAPH and HQ inclusion compounds where the main
interaction is of the fonm (Host)-OH····O-(Host). Both the DABCO and the ACRI guests
hydrogen bond to the host molecule. The host: guest ratios for A I·ACRI. AI· Y,NAPH.
A I· Y,DABCO and A I· YzHQ were found using nuclear magnetic resonance (NMR)
spectroscopy. The host:guest ratio for AI·YzBENZAL was found using thenmogravimetric
analysis. Enthalpy changes of the inclusion compounds were monitored using differential
scanning calorimetry (DSC). Kinetics of desolvation for AI·Y,BENZAL were conducted
using a non - isothenmal method where we have obtained an activation energy range of
74 k J morl
- 86 k J mor' . The solid - solid reaction kinetics for A I·Y,NAPH, A I· Y,HQ,
AI·ACRI and AI ·Y,DABCO were determined at room temperature using powder X-ray
diffraction (PXRD).
compounds with the solid guests l -naphthylamine (NAPH), 8-hydroxyquinoline (HQ).
acridine (ACRI), 1,4 - diazabicyclo[2.2.2]octane (DABCO) and a liquid guest
benzaldehyde (BENZAL). All four structures AI·YzNAPH, AI· Y,HQ AI·ACRI and
AI ·Y,DABCO were successfully solved in the triclinic space group P I . The structure of
AI·Y,BENZAL was successfully solved in the monocl inic space group P2dn . Similar
packin g motifs arise for the NAPH and HQ inclusion compounds where the main
interaction is of the fonm (Host)-OH····O-(Host). Both the DABCO and the ACRI guests
hydrogen bond to the host molecule. The host: guest ratios for A I·ACRI. AI· Y,NAPH.
A I· Y,DABCO and A I· YzHQ were found using nuclear magnetic resonance (NMR)
spectroscopy. The host:guest ratio for AI·YzBENZAL was found using thenmogravimetric
analysis. Enthalpy changes of the inclusion compounds were monitored using differential
scanning calorimetry (DSC). Kinetics of desolvation for AI·Y,BENZAL were conducted
using a non - isothenmal method where we have obtained an activation energy range of
74 k J morl
- 86 k J mor' . The solid - solid reaction kinetics for A I·Y,NAPH, A I· Y,HQ,
AI·ACRI and AI ·Y,DABCO were determined at room temperature using powder X-ray
diffraction (PXRD).
Additional information
Thesis (MTech (Chemistry))--Cape Peninsula University of Technology, 2009
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