Molecular Engineering of High-Performance Electrochromic Nanolayers

高性能电致变色纳米层的分子工程

• 批准号: 1905064
• 负责人: Peter Dinolfo
• 金额: $ 42万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1905064&HistoricalAwards=false
• 关键词: Molecular; Engineering; Performance; Electrochromic; Nanolayers; Molecular; Engineering; Performance; Electrochromic; Nanolayers

Professor Peter H. Dinolfo of the Department of Chemistry and Chemical Biology at Rensselaer Polytechnic Institute is supported by the Macromolecular, Supramolecular and Nanochemistry Program in the Division of Chemistry to develop a new type of electrochromic materials. Electrochromic materials change color when electricity is applied. The materials in this project are composed of thin film coatings of transition metal (mainly cobalt) complexes on solid surfaces. The project reveals fundamental chemical knowledge to better understand the how and why color changes occur. The knowledge obtained is critical to improving smart windows (improving building energy efficiency), antiglare coatings for automobile mirrors, chemical sensors, display materials, and optical memory devices. While many classes of electrochromic materials are available, the project promises to develop materials that maintain their color in a given chemical state after the electrical signal is switched off. As a result, this new class of materials is expected to have the advantage of operating with less electrical energy consumption. During the course of conducting this research, graduate and undergraduate students are trained in synthesis, material preparation and characterization and device construction. In addition, solar chemistry camps are organized and made available for high school students under the Summer at Rensselaer High School Research program. The project addresses the increasing need for electrochromic materials with high color contrast between states, coloration efficiency, long-term cycling durability and fast switching speeds. The focus is on the development of a new class of electrochromic materials using redox coupled spin crossover (RCSCO) organometallic complexes. Such materials undergo chemical transformations upon oxidation or reduction with significant splitting of the anodic and cathodic waves for a given redox couple. Click chemistry via a layer by layer method is used to generate nanoscale thin film electrochromic materials using cobalt (Co) complexes as building blocks. The resulting electrochromic materials are subjected to a series of experiments to investigate the effects of ligand binding to the Co centers on their spectroscopic, electrochemical, and magnetic properties. The team also examines the electrochemical charge transfer rates through their multilayer assemblies and investigates their coloration efficiency, switching times, and cycle lifetimes. The results inform the systematic variation of the molecular structure to optimize the material for specific electrochromic applications. Success of this research may transform how studies of transition metal coordination compounds featuring redox-coupled spin-crossover compounds are used as building blocks in electrochromic devices.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

伦斯勒理工学院化学与化学生物学系的彼得·H·迪诺尔福教授得到了化学部的大分子，超分子和纳米化学计划的支持，以开发一种新型的电染料材料。 电力材料在使用电时会改变颜色。 该项目中的材料由固体表面上的过渡金属（主要是钴）配合物的薄膜涂层组成。 该项目揭示了基本的化学知识，以更好地了解颜色变化的发生方式和原因。获得的知识对于改善智能窗口（提高建筑能源效率），汽车镜子的反拉力涂料，化学传感器，显示材料和光学记忆设备至关重要。尽管可以使用许多类别的电致色素材料，但该项目有望在关闭电信号后开发以给定的化学状态保持其颜色的材料。 结果，这类新的材料有望具有较少的电能消耗的优势。 在进行这项研究的过程中，研究生和本科生接受了合成，材料准备，表征以及设备构建的培训。此外，在Rensselaer高中研究计划的夏季，安装在高中生中还组织了太阳化学营地。该项目解决了对各州，色彩效率，长期循环耐用性和快速开关速度之间具有高颜色对比度的电致质材料的越来越多的需求。重点是使用氧化还原耦合旋转跨界（RCSCO）有机金属配合物的新型电致色素材料的开发。 这些材料在氧化或还原后进行化学转化，并为给定的氧化还原夫妇对阳极和阴极波的显着分裂。 使用层方法点击化学方法用于使用钴（CO）复合物作为构建块生成纳米级薄膜电致质材料。 所得的电致色素材料进行了一系列实验，以研究配体与CON中心对其光谱，电化学和磁性特性的影响。 该团队还通过其多层组件来检查电化学电荷转移率，并研究其色彩效率，切换时间和周期寿命。 结果为分子结构的系统变化提供了优化特定电致色素应用的材料的系统变化。这项研究的成功可能会改变过渡金属协调化合物的研究，其具有氧化还原耦合的自旋旋转化合物的化合物被用作电染色器设备中的构件。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的智力和更广泛影响的评估来通过评估来支持的，这是值得的。