期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 62, 期 1-3, 页码 673-680出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2005.02.036
关键词
cyanidin; quercetin; copigmentation UV-vis spectra; IR spectra
类别
Copigment complex fort-nation between cyanidin and quercetin, in aqueous buffered solutions, was studied by electronic absorption and infrared vibrational spectroscopies. It was found that the association of cyanidin with quercetin occurred at pH 3.0 and pH 5.0 including cyanidin flavylium ion and anhydrobase transformation forms, respectively. Obtained copigmentation constant values of K= 2726.7 (pH 3.0) and K= 1093.1 (pH 5.0) indicated good association ability of the investigated molecules. Infrared spectra revealed the existence of hydrogen bonds in the copigment complexes structures. The analysis of the deconvoluted infrared spectra indicated several types of hydrogen bonds, differently formed: the H-O-... H bonds with the corresponding bands around 3500 cm(-1) and bonds formed via H3O+, oxonium, ion of the molecules with the corresponding bands below 3000 cm-1. (c) 2005 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据