Artificial Light Harvesting Arrays

人造光采集阵列

• 批准号: 9102657
• 负责人: Anthony Harriman
• 金额: $ 10万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-05-01 至 1994-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9102657&HistoricalAwards=false
• 关键词: Artificial; Light; Harvesting; Arrays

In this research program, self-assembling arrays of molecules will be constructed that are photoactive and will mimic some of the essential features of natural light harvesting complexes. Porphyrin chromophores will be assembled so as to form antennae that facilitate energy migration between porphyrin molecules and subsequent energy transfer to a trap, where a chemical reaction can be initiated. Each antenna will be assembled by spontaneous self-association, by multi-point hydrogen bonding of heterocycles that are covalently bonded to the porphyrin ring. One, two, or four such heterocycles will be bonded to a single porphyrin ring such that dimers, polymolecular ribbons, cyclomers, and three- dimensional supramolecular arrays will result. In this manner, highly oriented structures will be formed in solution, in a mesophoric phase, or in the solid state, each of which has discrete porphyrin chromophores positioned within the critical distance for excitation energy migration and transfer. %%% This grant from the Organic Dynamics Program supports the research of Dr. Anthony M. Harriman at the University of Texas, Austin. The harvesting of light energy for the synthesis of molecules by plants, whereby chlorophyll is the energy harvesting system, is of obvious importance. This is a complex process in nature, where an array of chlorophyll molecules are assembled for the task of light harvesting. The porphyrin ring portion of chlorophyll is the light absorbing unit. In this project, porphyrin rings will be self-assembled and the transfer of light energy from the porphyrin ring to an appended energy trapping moiety will be studied. This system will serve to mimic the natural light harvesting system.

在这项研究计划中，自组装分子阵列将 被构造成具有光敏性，并且将模仿一些 天然集光复合物的基本特征。 卟啉发色团将被组装以形成触角 其促进卟啉分子之间能量迁移， 随后的能量转移到陷阱，在那里发生化学反应， 可以启动。每个天线将自发组装 通过杂环的多点氢键的自缔合 与卟啉环共价键合。一个，两个，或者 四个这样的杂环将键合到单个卟啉环上 使得二聚体、多分子带、环聚体和三聚体， 将产生三维超分子阵列。以这种方式， 高度定向的结构将在溶液中形成， 中间相或固态，其中的每一种具有 离散卟啉发色团位于临界 激发能迁移和转移的距离。 %%% 有机动力学计划的这笔拨款支持了这项研究 安东尼·M博士德克萨斯大学奥斯汀分校的哈里曼。的 收集光能用于分子合成， 植物，叶绿素是能量收集系统， 明显的重要性。这是一个复杂的自然过程， 叶绿素分子的排列是为了光的任务 收获 叶绿素的卟啉环部分是 光吸收单元在这个项目中，卟啉环将被 卟啉的自组装和光能传递 环附加的能量捕获部分将进行研究。这 系统将用于模仿自然光收集系统。