光系统II内外周天线高效传能机理-光学专业论文.docxVIP

摘要 摘要 信息。 。一 本论文的『宦0新之处： 1．全面综述了PSll的生物结构和光能超快速传递的功能之间的 关系。 2．首次提出了PSII能量传递四能带模型。附PSII各光合单元之 间的能量传递和耗散过程进行了理论计算和解释，并给出了 大致的能量传递途径和具体各光合功能单元之间的关系简 图。炒7 3．首次提出了外周天线捕光复合体LHCII能量传递的四能级模 型o(对捕光复合体LHCII内部的能量传递和耗散过程进行了 理论计算和近似讨论，获得了其内部各色素分予间及其向反 应中心传递能量的详细信息。y 4．建立了ICCD快速扫描成像双通道光谱装置。(采用了SPEX 270M双通道快速扫描光谱仪，能一次呈现120nm范围的整 个光谱图象，并同时获得样品的超快速动力学信息。整个实 验装置为快速、高效、准确地探测样品的光谱和分析超快速 动力学特性提供了技术手段。y l 关键词：能量传递，堂丕筮¨，天线系统，PSII能薰传递的四能 带模型，LHCII能量传递的四能级模型，飞秒时间分辨荧光光谱 技术， ICCD快速扫描成像光谱技术 一2． AbstractAbstract Abstract Abstract Photosynthesis is the most basic energy source for all life activities on the earth，as it turns carbon dioxide and water into organiC and oxygen using solar energy The first and also the most important question in photosynthesis is the mechanism of absorption，transfer and conversion of energy in the biological system．Solar energy is firstly absorbed by the antenna pigments，then the excitation energy is passed to reaction center，where the energy is stored in the form of chemical energy which can be used to drive biochemical reaction to fix carbon dioxide and synthesize organic The study on this process will provide scientific foundations and technological methods for：utilization of solar energy in a large scale，enhancement of crop production，splitting water to generate utilizable hydrogen and oxygen，and improvement of atmosphere environment． The high—efficient energy transfer process of antenna system of PSII is studied both experimentally and theoretically in this article The major content is： 1 The information concerning：composition and biological structure of PSll，ultrafast energy transfer process in PSII and theoretical methods applied to study it，is summarized in detail． 2 Based on present results of experimental and theoretical researches about the energy transfer process of PSII，a four-band model of PSII and a four-level model of LHCII to imitate the energy transfer is proposed for the first time in the world．The energy transfer and dissipation processes taking