Systematic Development of New Organic Conductors

新型有机导体的系统开发

• 批准号: 8921071
• 负责人: Dwaine Cowan
• 金额: $ 48万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-15 至 1993-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8921071&HistoricalAwards=false
• 关键词: Systematic; Development; New; Organic; Conductors

The principle aim of their research program is the systematic development of new organic conductors, semiconductors, and superconductors through a detailed understanding and chemical control of the electronic properties. This approach depends on a coherent interplay of synthesis, physical characterization and analysis to determine how molecular structure affects intermolecular interactions in organic solids. These interactions which are responsible for the electrical, magnetic and optical properties of these materials are highly sensitive to chemical modification. Their past work based on this approach has resulted in significant accomplishments in innovative synthesis, physical experiments, and theory of organic donors, acceptors, and radical salts. Their synthetic program will initially focus on three areas: (1) the development of synthetic procedures leading to the long-sought donor TMTTeF (tetramethyltetratellurafulvalene), the Te-congener of TMTSF from which evolved the first organic superconductor; (2) the preparation of a broad class of tetraoxafulvalenes and mixed dioxadithiafulvalenes donors; (3) the preparation of spiro-donors which may provide more two- and three-dimensional solid state interactions. Evolution of our synthetic program will continue to depend on guidance from concurrent correlated studies of the structural, electrical, optical, and magnetic properties of these compounds. In the electrical switching aspect of their program they hope to achieve a more complete understanding and chemical control of the formation and electrical properties of these materials that can reversibly switch relatively large amounts of current in a short time span.

他们研究计划的主要目标是通过对电子特性的详细了解和化学控制来系统地开发新型有机导体、半导体和超导体。 该方法依赖于合成、物理表征和分析的连贯相互作用，以确定分子结构如何影响有机固体中的分子间相互作用。 这些影响这些材料的电、磁和光学性质的相互作用对化学改性高度敏感。 他们过去基于这种方法的工作在创新合成、物理实验以及有机供体、受体和自由基盐理论方面取得了重大成就。 他们的合成计划最初将集中在三个领域：(1) 开发合成程序，获得长期寻找的供体 TMTTeF（四甲基四碲富瓦烯），TMTSF 的 Te 同系物，第一个有机超导体由此演化而来； (2) 广泛类别的四氧富瓦烯和混合二氧二硫富瓦烯供体的制备； (3)螺供体的制备，其可以提供更多的二维和三维固态相互作用。 我们的合成计划的发展将继续依赖于这些化合物的结构、电学、光学和磁性特性的同时相关研究的指导。 在他们的计划的电开关方面，他们希望对这些材料的形成和电性能有更完整的理解和化学控制，这些材料可以在短时间内可逆地开关相对大量的电流。