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2nd Generation Pyrylogen and 1st Generation Viologen Electron Transfer Catalysts

第二代 Pyrylogen 和第一代 Viologen 电子转移催化剂

基本信息

批准号：
1147542
负责人：
Edward Clennan
金额：
$ 49.12万
依托单位：
University of Wyoming
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2012
资助国家：
美国
起止时间：
2012-08-01 至 2016-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1147542&HistoricalAwards=false
关键词：
2nd Generation Pyrylogen 1st Viologen

项目摘要

With this award, the Chemical Structure, Dynamics and Mechanisms Program supports the work of Professor Edward L. Clennan at the University of Wyoming. The research will focus on the synthesis and characterization of 2nd generation dicationic light harvesting molecules. The highly charged frameworks of the 1st generation of these unique materials were designed to improve their efficiency as photoinduced electron transfer (PET) sensitizers by inhibiting energy wasting return electron transfer. The 2nd generation sensitizers that will be synthesized will have structural features that will improve their hydrolytic stabilities. They will also be partnered with a series of different charge balancing counterions in order to probe the counterion effect on reaction efficiencies. The photophysical and electrochemical characteristics of these new materials will be investigated and their abilities to increase the number of product molecules formed per photon used in several PET reactions will be determined. The ability of these new sensitizers to increase the chain length of a prototypical electron transfer chain reaction by inhibiting the chain termination step will also be examined. The value of these new sensitizers will also be demonstrated in several synthetically useful transformations.These new sensitizers will provide access to greener, more environmentally friendly, higher efficiency photoinduced electron transfer reactions. These reactions have the far-reaching impact of being able to produce new materials that are difficult or impossible to obtain using other methods. In addition, these new sensitizers are themselves fascinating new materials that have potential uses in devices as diverse as molecular switches, field-effect transistors, organic photovoltaic devices, and organic light emitting diodes (OLEDs). Finally, the students who will work on this project will obtain valuable experience in a wide range of computational and experimental tools.

有了这个奖项，化学结构，动力学和机制计划支持教授爱德华L。怀俄明州大学的克莱南。研究将集中在第二代双阳离子捕光分子的合成和表征。这些独特材料的第一代的高度带电框架被设计为通过抑制能量浪费的返回电子转移来提高其作为光诱导电子转移（PET）敏化剂的效率。将合成的第二代敏化剂将具有改善其水解稳定性的结构特征。它们还将与一系列不同的电荷平衡抗衡离子合作，以探索对反应效率的抗衡效应。将研究这些新材料的物理和电化学特性，并确定它们增加在几个PET反应中使用的每个光子形成的产物分子数量的能力。这些新的敏化剂的能力，以增加一个典型的电子转移链反应的链长，通过抑制链终止步骤也将被检查。这些新的敏化剂的价值也将在几个合成有用的转换中得到证明。这些新的敏化剂将提供更绿色，更环保，更高效的光诱导电子转移反应。这些反应具有深远的影响，能够产生使用其他方法难以或不可能获得的新材料。此外，这些新的敏化剂本身就是迷人的新材料，在分子开关，场效应晶体管，有机光伏器件和有机发光二极管（OLED）等各种器件中具有潜在的用途。最后，谁将在这个项目工作的学生将获得广泛的计算和实验工具的宝贵经验。