期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
卷 169, 期 2, 页码 153-158出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2004.06.016
关键词
DNA; cyclodextrin; Safranine T; supramolecular system
The interaction of Safranine T(ST) with cyclodextrins (CDs) including beta-cyclodextrin (beta-CD) and carboxymethyl-beta-cyclodextrin (CM-beta-CD) and DNA in aqueous solution is studied by UV-vis absorption and steady-state fluorescence technique. The interactive model of ST with double stranded DNA has been investigated by means of the inclusive action of beta-CD and CM-beta-CD. Based on the changes of absorption, fluorescence and resonance light scattering (RLS) spectra, the intrinsic binding constant (K-ap) and the binding site number (n) of ST with DNA and the inclusion complexes ST-CD with DNA are obtained in the case of 20 mmol/L Tris-HCl buffer solution (pH 7.2). According to the experimental results, it can be inferred that the interactive model of dimer ST with DNA is electrostatic binding, while the monomer ST with DNA is intercalative binding. (C) 2004 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