Issue 84, 2013
From the journal:

Chemical Communications

Effects of ionic radius of redox-inactive bio-related metal ions on the radical-scavenging activity of flavonoids evaluated using photometric titration†

Tsukasa Waki,ab   Shigeki Kobayashi,c   Ken-ichiro Matsumoto,a   Toshihiko Ozawa,d   Tadashi Kamada*ab  and  Ikuo Nakanishi*a  

* Corresponding authors

a Research Center for Charged Particle Therapy, National Institute of Radiological Sciences (NIRS), Inage-ku, Chiba 263-8555, Japan
E-mail: nakanis@nirs.go.jp
Fax: +81-43-255-6819
Tel: +81-43-206-3131

b Graduate School of Medical and Pharmaceutical Sciences, Chiba University, Chiba 260-8670, Japan

c Division of Analytical Chemistry of Medicines, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan

d Department of Health Pharmacy, Yokohama College of Pharmacy, Yokohama, Kanagawa 245-0066, Japan

Abstract

Mg2+ enhanced the scavenging activity of (+)-catechin and quercetin against the 2,2-diphenyl-1-picrylhydrazyl radical (DPPH˙), while Al3+ decreased their activity. Such effects of Mg2+ and Al3+ were not observed for kaempferol. Na+ and Ca2+ with large ionic radii showed little effect on the DPPH˙-scavenging activity of these three flavonoids.

Graphical abstract: Effects of ionic radius of redox-inactive bio-related metal ions on the radical-scavenging activity of flavonoids evaluated using photometric titration

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Article information

DOI
https://doi.org/10.1039/C3CC45124K
Article type
Communication
Submitted
08 Jul 2013
Accepted
27 Aug 2013
First published
28 Aug 2013

Chem. Commun., 2013,49, 9842-9844

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Effects of ionic radius of redox-inactive bio-related metal ions on the radical-scavenging activity of flavonoids evaluated using photometric titration

T. Waki, S. Kobayashi, K. Matsumoto, T. Ozawa, T. Kamada and I. Nakanishi, Chem. Commun., 2013, 49, 9842 DOI: 10.1039/C3CC45124K

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