Adnan, Nabila Elyana and Mohd Nasuha, Nur Atiqah and Abdullah, Zanariah and Choo, Yeun Mun and Tajuddin, Hairul Anuar (2018) Isolation and Photophysical Properties of Di- and Tri-substituted Natural Anthraquinones from Malaysian Morinda citrifolia. Sains Malaysiana, 47 (5). pp. 903-908. ISSN 0126-6039, DOI https://doi.org/10.17576/jsm-2018-4705-05.
Full text not available from this repository.Abstract
Five di- and tri-substituted natural anthraquinones, i.e. nordamnacanthal (1), damnacanthal (2), rubiadin (3), 1-methoxy-2-methyl-3-hydroxyanthraquinone (4) and 1-hydroxy-3-methoxyanthraquinone (5) were subjected to photophysical studies. The results indicated that steric hindrance and intramolecular hydrogen bonding are important factors that affect absorption and emission spectral of these natural anthraquinones. Besides that, emission properties were significantly enhanced with formation of intramolecular hydrogen bonding in 1,3-dihydroxy-2-aldehyde tri-substituted anthraquinone 1. This gave rise to formation of two additional quasi aromatic rings extending the π-conjugation system in the anthraquinone structure.
| Item Type: | Article |
|---|---|
| Funders: | University Malaya Research Grant (UMRG; RP002A-13Bio and RP002B-13Bio), University of Malaya HIR grant (UM.C/625/1/HIR/MOHE/ ARTS01), Government of Malaysia MOSTI e-ScienceFund (SF004-2014), Government of Malaysia MOHE fund (MO002-2014), Postgraduate Research Fund of University Malaya (PG089-2014A and PG035-2015A) |
| Uncontrolled Keywords: | Absorption spectral; anthraquinone; emission spectral; intramolecular hydrogen bonding; photophysical properties |
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry |
| Divisions: | Faculty of Science > Department of Chemistry |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 08 Oct 2019 02:43 |
| Last Modified: | 08 Oct 2019 02:43 |
| URI: | http://eprints.um.edu.my/id/eprint/22697 |
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