Investigation of hole or excess electron hopping in DNA is mostly performed based on yield studies, in which an injector modified DNA duplex is irradiated to continuously inject either holes or electrons into the duplex. Observed is a chemical reaction of a âprobeâ molecule, which can be either one of the two purine bases or a different trap molecule positioned at various distances. The next step in the field will be the direct time resolution of the hole or electron transfer kinetics in DNA. Herein we describe the development of defined donorâDNAâacceptor systems, with properties that may allow time resolved electron and hole transfer studies in stably folded DNA structures.
对DNA中的空穴或多余电子跳跃的研究主要基于产率研究,其中,将经过改造的DNA双链注射器照射,以连续向双链注入空穴或电子。观察到的结果是“探针”分子的
化学反应,该分子可以是两种
嘌呤碱基之一,也可以是位于不同距离处的不同捕获分子。该领域的下一步将是直接测量DNA中空穴或电子转移的动力学时间分辨率。在此,我们描述了定义的供体-DNA-受体系统的开发,其特性允许在稳定折叠的DNA结构中进行时间分辨的电子和空穴转移研究。