CAS:Rigidochromism in Polynuclear Metal-azole Macrocycles and Networks

在化学结构、动力学和机制计划B的支持下，普渡大学的Alexander魏教授将开发新的发光(发光)分子。有机发光器件(OLED)的进展依赖于化学稳定的材料，这些材料在红色、绿色，特别是蓝色波长发光。本论文主要研究与铜离子结合在一起的刚性马鞍形分子的合成及其发光性质。一个重要的问题是，为什么这些分子是刚性的。这些发光铜络合物中的一些还可以根据环境的变化改变颜色，并可能被用作化学传感器。GRANT活动的目的是了解分子结构和光物理性质之间的关系。这项研究有可能通过向学生和公众传达这些关系的创新实验来促进灵活固态照明和显示器设计的进步。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脱色行为相关联；(Ii)开发用于调节固态发射体分子能带能级的正交方法；(Iii)设计排列激发态偶极子以进行单轴发射的金属-有机骨架(MOF)。所有的目标都对发光材料的设计具有重要的影响，这些材料在开发高效的有机发光二极管方面具有潜在的应用价值。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，这些丰富多彩的综合体提供了向学生和广大公众展示重要化学概念的教育机会。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测试条，该测试条在受热时能产生绿光，在汽油蒸气等挥发性碳氢化合物中暴露时能产生蓝光。这一奖项反映了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。

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.