SGER: Design of Organometallic Molecular Machines

SGER：有机金属分子机器的设计

• 批准号: 0227475
• 负责人: Theodore Burkey
• 金额: $ 9.7万
• 依托单位: University of Memphis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-06-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0227475&HistoricalAwards=false
• 关键词: SGER; Design; Organometallic; Molecular; Machines

This Small Grant for Exploratory Research (SGER) award by the Inorganic, Bioinorganic and Organometallic Chemistry program supports research by Professor Theodore J. Burkey at the University of Memphis to prepare light-driven molecules that undergo reversible sub-picosecond isomerizations with unit quantum yields. These molecules are potential devices in optical switches, digital memory or light-driven computers. The molecules are designed to function by exchange of chelated ligands through an isomerization based on ring opening followed by the formation of another chelate ring. Ligands, metal centers and chelate rings will be designed so that the photochemically driven isomerization is ultrafast and efficient to the exclusion of all other processes. Organometallic compounds based on cymatrene-type complexes will be studied to analyze important structural features. Two types of rotational motion around a single carbon-carbon bond will be studied: 1) A conrotary motion of different geminal functional groups on a single side chain, and 2) A disrotary motion of different vicinal functional groups on a ring that formally is a two side-chain derivative. Selected compounds will be examined by ultrafast IR to determine the mechanism of isomerization, participation of solvent and dissociated ligands, and the time scale of related processes.Molecules for potential use in light-driven electronic devices will be studied. These studies will provide a fundamental understanding of ultrafast processes of photochemical bond breaking and subsequent bond formation.

这项由无机、生物无机和有机金属化学项目颁发的小额探索性研究资助 (SGER) 奖项支持孟菲斯大学 Theodore J. Burkey 教授的研究，以制备光驱动分子，这些分子可以以单位量子产率进行可逆的亚皮秒异构化。 这些分子是光开关、数字存储器或光驱动计算机中的潜在器件。 这些分子被设计为通过基于开环的异构化交换螯合配体，然后形成另一个螯合环。 配体、金属中心和螯合环的设计使得光化学驱动的异构化能够超快且高效，从而排除所有其他过程。 将研究基于聚酰胺烯型配合物的有机金属化合物，以分析重要的结构特征。 将研究围绕单个碳-碳键的两种类型的旋转运动：1）单个侧链上不同孪生官能团的同旋运动，以及 2）形式上为双侧链衍生物的环上不同邻位官能团的双旋运动。 选定的化合物将通过超快红外进行检查，以确定异构化机制、溶剂和解离配体的参与以及相关过程的时间尺度。将研究在光驱动电子器件中潜在用途的分子。 这些研究将为光化学键断裂和随后的键形成的超快过程提供基本的了解。