Synthesis and Photophysical Properties of Triazolyl Ir
<sup>III</sup>
Nucleosides
作者:Johan Passays、Christophe Rubay、Lionel Marcélis、Benjamin Elias
DOI:10.1002/ejic.201601227
日期:2017.1.18
natural DNA structure. Thanks to their photophysical and photochemical properties, iridium(III) complexes are of increasing interest in the development of sensors and photoreactants for biochemical applications. In this view, we previously demonstrated that some IrIII complexes are able to photoreact with DNA through photoinduced electron transfer. In this study, we report the synthesis and characterization
基于 DNA 的纳米材料是众多研究的主题。合成了一系列修饰的核碱基,以构建双螺旋,其中天然 H 键合的碱基被金属配位的 liganosides 取代,或者在天然 DNA 结构中引入准时修饰。由于其光物理和光化学特性,铱 (III) 配合物在用于生物化学应用的传感器和光反应剂的开发中越来越受到关注。从这个角度来看,我们之前证明了一些 IrIII 复合物能够通过光诱导电子转移与 DNA 发生光反应。在这项研究中,我们报告了与其母体配合物相比具有未改变特性的带有铱配合物的核苷的合成和表征。
Synthesis, spectrophotometric pH titrations and DNA binding properties of a cyclometalated iridium(III) complex of tetrapyrido[3,2-a:2′,3′-c:3″,2″-h:2‴,3‴-j]phenazine
作者:Yan-Min Chen、An-Guo Zhang、Yan-Ju Liu、Ke-Zhi Wang
DOI:10.1016/j.jorganchem.2010.12.013
日期:2011.5
A new cyclometalated iridium(III) complex [Ir(ppy)(2)(tpphz)] Cl Hppy - 2-phenylpyridine and tpphz - tetrapyrido[3,2-a:2',3'-c:3 '',2 ''-h:2 ''',3 '''-j] phenazine} has been synthesized and characterized. The pH effects on UV-vis absorption spectra have been studied, and three ground-state acidity ionization constant values have been derived. The calf thymus (ct) DNA binding properties of the complex have also been investigated with UV-vis absorption spectrophotometric titrations, DNA competitive binding with ethidium bromide, DNA melting experiments, viscosity measurements, and density functional theory calculations. The complex was demonstrated to act as a DNA intercalator with a binding constant of (9.29 +/- 1.26) x 10(5) M-1 more than one order of magnitude greater than that previously reported for DNA intercalator of [Ir(ppy) 2(dppz)](+). (C) 2010 Elsevier B. V. All rights reserved.