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- Title
Thermochemistry of pyrolyzed rutin and its esters prepared from facile biocatalytic route.
- Authors
ABD RAZAK, NURUL NADIAH; MOHAMAD ANNUAR, MOHAMAD SUFFIAN
- 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 α 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 (ΔS) and enthalpy (ΔH) changes of the pyrolysis are discussed.
- Subjects
ACTIVATION energy; ENERGY dissipation; FLAVONOIDS; X-ray diffraction; ESTERIFICATION
- Publication
Journal of the Serbian Chemical Society, 2024, Vol 89, Issue 6, p823
- ISSN
0352-5139
- Publication type
Article
- DOI
10.2298/JSC230624002A