Bioinspired Complexes of Asymmetric Ligands as Redox-responsive Precursors toward Surface-based Molecular Electronics

仿生不对称配体复合物作为表面分子电子学的氧化还原响应前体

• 批准号: 0718470
• 负责人: Claudio Verani
• 金额: $ 35万
• 依托单位: Wayne State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-06-01 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0718470&HistoricalAwards=false
• 关键词: Bioinspired; Complexes; Asymmetric; Ligands; Redox

This award in the Inorganic, Bioinorganic and Organometallic Chemistry program supports research by Prof. Claudio Verani at Wayne State University to study redox-driven switching in transition-metal coordination complexes and molecular organization on surfaces. The work is aimed at moving coordination chemistry closer to device fabrication in molecular electronics by addressing a gap between solution-based switching and the inclusion of amphiphilic and self assembling properties in such molecules to allow for surface deposition. New approaches for ground-state switching will be explored by investigating radical formation and stabilization in square pyramidal and trigonal bipyramidal complexes. The choice of systems is inspired by the reversibility and stability observed in five-coordinate centers involved in radical-based mechanisms in enzymes. This approach includes the design of electroactive ligands, complex formation, the study of redox, magnetic, and spectroscopic properties of five-coordinate trivalent ions such as iron, among others. The influence of aromatic groups and the formation of multimetal/multiradical arrays will be assessed, and fundamental information will be obtained regarding the mechanisms of radical stabilization/cycling and weak coupling in unusual environments. New synthetic methodologies will be pursued for surface deposition based on modular monolayers obtained via Langmuir-Blodgett or self-assembled film formation.The impact of this proposal lies in incorporating amphiphilic and self-assembling properties in a new class of redox-based switching molecules in order to integrate metal complexes into molecular electronics. The educational component strives to enhance the exposure of middle- and high school students from underrepresented demographic groups in the sciences, and addresses the training of science teachers from the Detroit Public School system by means of seminars at public schools and hands-on work in the PI's lab. African-American and Latino students will be attracted to the sciences and science-related careers, and the training of science teachers will enable these instructors to become instruments of change for a wider range of students.

无机，生物无机和有机化学计划的这一奖项支持韦恩州立大学的Claudio Verani教授的研究，以研究氧化还原驱动的过渡金属配位络合物和表面分子组织的切换。这项工作的目的是通过解决基于溶液的开关和在此类分子中包含两亲性和自组装特性以允许表面沉积之间的差距，使配位化学更接近分子电子学中的器件制造。基态开关的新途径将探索通过调查自由基的形成和稳定的四方锥和三角双锥复合物。系统的选择受到酶中基于自由基的机制中涉及的五坐标中心中观察到的可逆性和稳定性的启发。 这种方法包括电活性配体的设计，络合物的形成，五配位三价离子如铁的氧化还原，磁性和光谱性质的研究等。 芳香族基团的影响和多金属/多自由基阵列的形成将进行评估，并将获得有关自由基稳定/循环和弱耦合在不寻常的环境中的机制的基本信息。 新的合成方法将追求表面沉积的基础上获得的模块单分子膜通过Langmuir-Blodgett或自组装film formation.The影响，这一建议在于将两亲性和自组装性能在一类新的氧化还原基开关分子，以整合金属配合物到分子电子学。 教育部分致力于提高初中和高中学生在科学方面代表性不足的人口群体的曝光率，并通过在公立学校举办研讨会和在PI实验室进行实践工作的方式，解决底特律公立学校系统科学教师的培训问题。 非裔美国人和拉丁裔学生将被科学和科学相关职业所吸引，对科学教师的培训将使这些教师成为更广泛学生的变革工具。