Abd Razak, Nurul Nadiah and Annuar, Mohamad Suffian Mohamad (2024) Thermochemistry of pyrolyzed rutin and its esters prepared from facile biocatalytic route. Journal of the Serbian Chemical Society, 89 (6). pp. 823-840. ISSN 0352-5139, DOI https://doi.org/10.2298/JSC230624002A.
Full text not available from this repository.Abstract
Pyrolysis of quercetin-3-O-rutinoside or rutin and its esters were investigated. Purified ester samples were prepared from lipase-catalyzed esterification of the parent flavonoid, i.e., rutin using acyl donors with different carbon chain length. X-ray diffraction revealed the presence of crystalline peaks in the rutin esters. The degradation activation energies (Ea) as a function of conversion degree alpha were determined using Kissinger-Akahira-Sunose and Flynn-Wall-Ozawa methods, with corroborative results. Disparity in Ea implies distinct thermal degradation routes. For all studied compounds, degradation is a non-spontaneous process. The presence of acyl moieties and their corresponding carbon chain length in relation to thermodegradation profiles, Ea, entropy (Delta S) and enthalpy (Delta H) changes of the pyrolysis are discussed.
| Item Type: | Article |
|---|---|
| Funders: | Universiti Malaya, Malaysia, MAHSA University (RP206-12/23) |
| Uncontrolled Keywords: | activation energy; ester; flavonoid; pyrolysis; thermogravimetry |
| Subjects: | Q Science > Q Science (General) |
| Divisions: | Centre for Foundation Studies in Science Faculty of Science > Institute of Biological Sciences |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 06 Jan 2025 01:48 |
| Last Modified: | 06 Jan 2025 01:48 |
| URI: | http://eprints.um.edu.my/id/eprint/47063 |
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