CAS:Rigidochromism in Polynuclear Metal-azole Macrocycles and Networks

在化学结构、动力学和机理B项目的支持下，普渡大学的Alexander Wei教授将开发新的发光分子。有机发光器件（oled）的进步依赖于化学上稳定的材料，这些材料可以发射红、绿、尤其是蓝波长的光。本研究的重点是与铜离子结合在一起的刚性鞍形分子的合成和发光特性。一个重要的问题是为什么这些分子是刚性的。其中一些发光的铜配合物还可以根据环境的变化而改变颜色，可以用作化学传感器。资助活动旨在了解分子结构和光物理性质之间的关系。这项研究有可能促进柔性固态照明和显示器设计的进步，通过创新的实验，可以将这些关系传达给学生和公众。该项目的研究活动将包括：(i)将唑结构与相应铜配合物的刚性变色行为联系起来；（ii）发展调谐固态发射体分子能带水平的正交方法；（iii）设计金属有机框架（mof），使其对准激发态偶极子进行单轴发射。所有这些目标都对设计具有潜在应用于高效oled开发的发射材料具有重要影响。这些目标植根于基于超分子化学原理的基础材料研究。此外，这些色彩缤纷的复合物为学生和广大公众展示重要的化学概念提供了教育机会。作为与普渡大学化学系合作的K-12推广活动的一部分，魏教授和他的团队将设计发光试纸，当加热时可以发出绿光，当暴露于挥发性碳氢化合物（如汽油蒸气）时可以发出蓝光。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

With support from the Chemical Structure, Dynamics and Mechanisms Program B, Professor Alexander Wei at Purdue University will develop new luminescent (light-emitting) molecules. Advances in organic light-emitting devices (OLEDs) depend on chemically stable materials that emit at red, green and especially blue wavelengths. This research focuses on the synthesis and luminescent properties of rigid, saddle-shaped molecules which are held together with copper ions. One important question is why these molecules are rigid. Some of these light-emitting copper complexes can also switch colors in response to changes in their environment and may beapplied as chemical sensors. Grant activities are aimed at understanding the relationships between molecular structure and photophysical properties. This research has the potential to facilitate advances in the design of flexible solid-state lighting and displays through innovative experiments that can convey these relationships to students and the general public.Research activities in this project will include: (i) correlating azole structure with rigidochromic behavior of the corresponding copper complexes; (ii) developing orthogonal approaches for tuning molecular energy band levels of solid-state emitters; (iii) designing metal‒organic frameworks (MOFs) that align excited-state dipoles for uniaxial emission. All objectives have important ramifications for the design of emissive materials with potential applications in the development of efficient OLEDs. These objectives are rooted in fundamental materials research based on the principles of supramolecular chemistry. In addition, these colorful complexes offer educational opportunities to demonstrate important chemical concepts to students and the public at large. As part of a K-12 outreach activity in association with the Purdue Department of Chemistry, Professor Wei and his team will design luminescent test strips that can produce green light when heated, and blue light when exposed to volatile hydrocarbons such as gasoline vapor.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.