有机/高分子光诱导电荷转移材料研究  

Photoinduced Electron Transfer Processes of Organic/Polymeric Functional Materials

作　　者：白金瑞[1] 虞大红[1] 王燕[1] 

机构地区：[1]华东理工大学化学与分子工程学院,上海200237

出　　处：《广东化工》2011年第5期33-35,共3页Guangdong Chemical Industry

摘　　要：光诱导电子转移是光电转换体系中发生的一个简单而重要的过程,即:在受到光激发时,一个电子从电子给体(D)转移到电子受体(A)并形成给体自由基阳离子(D·+)和受体自由基阴离子(A·-)的过程。与之相伴的另一个过程是后电子转移过程,即电子重新回到体系的最初状态的过程。为了使放热式电子转移过程顺利进行,最重要的决定因素在于电子给体和受体的电化学和光物理性质必须匹配。用纳秒激光瞬态吸收光谱在可见-近红外区域能够检测分子间电子转移行为,其重要的标志是观察体系自由基离子的形成。文章简要介绍了国内外关于给体-受体型分子材料的光诱导电荷转移过程研究进展。Studies of donor-acceptor systems capable of undergoing photoinduced electron transfer to mimic the primary events of the photosynthetic reaction center and also to develop molecular electronic devices were of current interest.Photoinduced electron transfer was a simple process in which an electron was transferred from an electron-donating species（D） to an electron-accepting species（A）,producing the radical cation of the donor（D·＋） and the radical anion of the acceptor（A·-）,when one of these species is photoexcited.Another process that can follow electron transfer is back electron transfer leading to the initial state of the reactants.A critical factor in the electron transfer process lies in the successful matching of donor and acceptor with suitable electrochemical and photophysical properties for the occurrence of such an exothermic electron transfer.The intermolecular electron transfer events can be monitored by observing the radical ions by means of nanosecond transient absorption spectra in the visible and near-IR regions.In the paper,photoinduced electron transfer processes of D-A type functional materials are reviewed in brief.

关 键 词：光诱导电荷转移 富勒烯 酞菁 卟啉 苝 

分 类 号：O644[理学—物理化学]