Isolation and Photophysical Properties of Di- and Tri-substituted Natural Anthraquinones from Malaysian Morinda citrifolia

被引：4
|
作者：
Adnan, Nabila Elyana [1 ]
Nasuha, Nur Atiqah Mohd [1 ]
Abdullah, Zanariah [1 ]
Choo, Yeun-Mun [1 ]
Tajuddin, Hairul Anuar [1 ]
机构：
[1] Univ Malaya, Chem Dept, Jalan Univ, Kuala Lumpur 50603, Malaysia
来源：
SAINS MALAYSIANA | 2018年 / 47卷 / 05期
关键词：
Absorption spectral; anthraquinone; emission spectral; intramolecular hydrogen bonding; photophysical properties; ENTEROBACTER-CLOACAE; PHOTOCHEMISTRY; DERIVATIVES; ABSORPTION;
D O I：
10.17576/jsm-2018-4705-05
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Five di- and tri-substituted natural anthraquinones, i.e. nordamnacanthal (1), damnacanthal (2), rubiadin (3), 1-methoxy2- 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 p-conjugation system in the anthraquinone structure.
引用
收藏
页码：903 / 908
页数：6
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