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A functionalized cobalt(III) mixed-polypyridyl complex as a newly designed DNA molecular light switch

机译:一种功能化的钴(III)混合聚吡啶基配合物,作为新设计的DNA分子光开关

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摘要

The ligand ODHIP (3,4-dihydroxyl-imidazo[4,5-f][1,10]phenanthroline) and its cobalt(III) complex [Co(bpy)(2)(ODHIP)](3+) were synthesized and characterized. Binding of this complex with calf thymus DNA has been investigated by spectroscopic methods and viscosity. The experimental results indicated that the complex bound to DNA by intercalation. In Tris buffer, the complex could emit relatively weak luminescence. After binding to DNA, the notable enhancement was observed. However, when the Cu2+ was further added, the luminescence decreased gradually and disappeared after the equimolar concentrations of Cu2+ was added, which exhibited the "off-on-off" properties of molecular light switch. (C) 2003 Elsevier Science Inc. All rights reserved. [References: 26]
机译:合成了配体ODHIP(3,4-二羟基咪唑并[4,5-f] [1,10]菲咯啉)及其钴(III)配合物[Co(bpy)(2)(ODHIP)](3+)和特点。已经通过光谱方法和粘度研究了该复合物与小牛胸腺DNA的结合。实验结果表明该复合物通过嵌入与DNA结合。在Tris缓冲液中,复合物可能会发出相对较弱的发光。与DNA结合后,观察到明显的增强。然而,当进一步添加Cu 2+时,当加入等摩尔浓度的Cu 2+时,发光逐渐降低并消失,这表现出分子光开关的“开-关-关”特性。 (C)2003 Elsevier Science Inc.保留所有权利。 [参考:26]

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