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Molecular Engineering of High-Performance Electrochromic Nanolayers

高性能电致变色纳米层的分子工程

基本信息

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

项目摘要

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和化学生物学系的Peter H.Dinolfo教授得到了化学系高分子、超分子和纳米化学计划的支持，以开发一种新型的电致变色材料。电致变色材料在通电时会变色。该项目中的材料是由过渡金属(主要是钴)络合物在固体表面形成的薄膜涂层组成。该项目揭示了基本的化学知识，以更好地理解颜色变化的方式和原因。所获得的知识对于改进智能窗户(提高建筑能效)、汽车后视镜防眩光涂层、化学传感器、显示材料和光学存储设备至关重要。虽然有许多种类的电致变色材料可用，但该项目承诺开发出在电信号关闭后在给定化学状态下保持颜色的材料。因此，这种新型材料有望具有以更少的电能消耗运行的优势。在进行这项研究的过程中，对研究生和本科生进行了合成、材料制备和表征以及器件构造方面的培训。此外，在伦斯勒高中的夏季研究计划下，还为高中生组织和提供太阳能化学夏令营。该项目满足了对电致变色材料日益增长的需求，这些材料具有高状态之间的颜色对比度、着色效率、长期循环耐用性和快速切换速度。重点是利用氧化还原耦合自旋交叉(RCSCO)有机金属络合物开发一类新型电致变色材料。这种材料在氧化或还原时经历化学转变，对于给定的氧化还原对，阳极波和阴极波发生显著分裂。采用逐层点击化学的方法，以钴(Co)络合物为基块制备纳米级薄膜电致变色材料。对得到的电致变色材料进行了一系列的实验，研究了配体与Co中心的结合对其光谱、电化学和磁性的影响。该团队还通过其多层组件检查了电化学电荷转移速率，并调查了它们的着色效率、切换时间和循环寿命。这些结果为分子结构的系统变化提供了信息，从而为特定的电致变色应用优化了材料。这项研究的成功可能会改变以氧化还原偶联自旋交叉化合物为特征的过渡金属配位化合物作为电致变色器件构建块的研究方式。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。