Isolation and photophysical properties of Di- and Tri-substituted natural anthraquinones from Malaysian Morinda citrifolia

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 intramolecula...

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Main Authors:	Nabila Elyana Adnan, Nur Atiqah Mohd Nasuha, Zanariah Abdullah, Choo, Yeun-Mun, Hairul Anuar Tajuddin
Format:	Article
Language:	English
Published:	Penerbit Universiti Kebangsaan Malaysia 2018
Online Access:	http://journalarticle.ukm.my/12078/ http://journalarticle.ukm.my/12078/ http://journalarticle.ukm.my/12078/1/05%20Nabila%20Elyana%20Adnan.pdf

id	ukm-12078
recordtype	eprints
spelling	ukm-120782018-09-22T10:30:01Z http://journalarticle.ukm.my/12078/ Isolation and photophysical properties of Di- and Tri-substituted natural anthraquinones from Malaysian Morinda citrifolia Nabila Elyana Adnan, Nur Atiqah Mohd Nasuha, Zanariah Abdullah, Choo, Yeun-Mun Hairul Anuar Tajuddin, 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. Penerbit Universiti Kebangsaan Malaysia 2018-05 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/12078/1/05%20Nabila%20Elyana%20Adnan.pdf Nabila Elyana Adnan, and Nur Atiqah Mohd Nasuha, and Zanariah Abdullah, and Choo, Yeun-Mun and Hairul Anuar Tajuddin, (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 http://www.ukm.my/jsm/english_journals/vol47num5_2018/contentsVol47num5_2018.html
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	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.
format	Article
author	Nabila Elyana Adnan, Nur Atiqah Mohd Nasuha, Zanariah Abdullah, Choo, Yeun-Mun Hairul Anuar Tajuddin,
spellingShingle	Nabila Elyana Adnan, Nur Atiqah Mohd Nasuha, Zanariah Abdullah, Choo, Yeun-Mun Hairul Anuar Tajuddin, Isolation and photophysical properties of Di- and Tri-substituted natural anthraquinones from Malaysian Morinda citrifolia
author_facet	Nabila Elyana Adnan, Nur Atiqah Mohd Nasuha, Zanariah Abdullah, Choo, Yeun-Mun Hairul Anuar Tajuddin,
author_sort	Nabila Elyana Adnan,
title	Isolation and photophysical properties of Di- and Tri-substituted natural anthraquinones from Malaysian Morinda citrifolia
title_short	Isolation and photophysical properties of Di- and Tri-substituted natural anthraquinones from Malaysian Morinda citrifolia
title_full	Isolation and photophysical properties of Di- and Tri-substituted natural anthraquinones from Malaysian Morinda citrifolia
title_fullStr	Isolation and photophysical properties of Di- and Tri-substituted natural anthraquinones from Malaysian Morinda citrifolia
title_full_unstemmed	Isolation and photophysical properties of Di- and Tri-substituted natural anthraquinones from Malaysian Morinda citrifolia
title_sort	isolation and photophysical properties of di- and tri-substituted natural anthraquinones from malaysian morinda citrifolia
publisher	Penerbit Universiti Kebangsaan Malaysia
publishDate	2018
url	http://journalarticle.ukm.my/12078/ http://journalarticle.ukm.my/12078/ http://journalarticle.ukm.my/12078/1/05%20Nabila%20Elyana%20Adnan.pdf
first_indexed	2023-09-18T20:01:48Z
last_indexed	2023-09-18T20:01:48Z
_version_	1777406898444697600

Isolation and photophysical properties of Di- and Tri-substituted natural anthraquinones from Malaysian Morinda citrifolia

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