Collaborative Research: Diarylethene-based Crystalline Materials: Design and Function

合作研究：二芳基乙烯基晶体材料：设计和功能

• 批准号: 2003336
• 负责人: Jeffrey Rack
• 金额: $ 13.7万
• 依托单位: University of New Mexico
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-07-01 至 2023-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2003336&HistoricalAwards=false
• 关键词: Collaborative; Research; Diarylethene; based; Crystalline

Non-technical Abstract:In this project, supported by the Solid State and Materials Chemistry program in the Division of Materials Research, Associate Professor Jason Benedict of the University at Buffalo, The State University of New York and Professor Jeffrey Rack of the University of New Mexico are developing crystalline porous materials that are activated by UV light. These molecular materials comprise photo-active chemical groups that change shape when exposed to light. The light-driven molecular transformations cause the pores (holes) and channels in the crystals to change shape and dimension. This leads to the development of smart materials capable of selectively absorbing or releasing guest molecules, but only when exposed to the proper wavelength of light. Experiments using ultrafast pulses of light and/or X-rays reveal critical insights into the fundamental photochemistry that occurs in these novel materials. The research establishes much needed design principles to understand and enable the rational design of next-generation photo-responsive materials. The educational projects include the continuation of the U.S. Crystal Growing Competition, and a nation-wide crystal growing competition, that brings concepts of crystals and crystal growth into K-12 classrooms and home schools throughout the country by providing participants a fun and exciting hands-on STEM-based contest.Technical Abstract:Integrating the photo-responsive properties of diarylethenes into hybrid crystalline systems transforms these traditionally passive materials into active materials that change their chemical or electronic properties in response to light stimulus. The PIs' innovative approach - using ring-closed diarylethene building units - ensures the reliable and predictable synthesis of photo-responsive crystalline materials. Given the importance of extending longevity in sustainable materials development, the proposed research also includes an effort to identify and understand the root causes of fatigue in these systems. The photochemical reactions in these materials, both desired and undesired, are precisely monitored through advanced spectroscopic and in situ X-ray diffraction methods. These experiments provide a crucial link between the molecular photochemistry and the photophysics of the proposed hybrid crystalline solids. It is anticipated that the design principles and experimental techniques developed through this collaborative research program can be extended to other photochromic systems. The outreach efforts bring concepts of crystal growth classrooms across the country through the continued growth of the US Crystal Growing Competition.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.

非技术摘要：在该项目中，在材料研究部的固态和材料化学计划的支持下，布法罗大学的Jason Benedict副教授，纽约州立大学和新墨西哥大学的Jeffrey Rack教授正在开发由UV Light激活的结晶多孔材料。这些分子材料包含光活性化学基团，这些化学基团在暴露于光线时会改变形状。光驱动的分子变换会导致孔（孔）和晶体中的通道改变形状和尺寸。这导致了能够选择性吸收或释放来宾分子的智能材料的开发，但仅在暴露于适当的光波长时。使用光和/或X射线超快脉冲的实验揭示了对这些新型材料中发生的基本光化学的关键见解。该研究建立了急需的设计原理，以理解和实现下一代照片响应材料的合理设计。 The educational projects include the continuation of the U.S. Crystal Growing Competition, and a nation-wide crystal growing competition, that brings concepts of crystals and crystal growth into K-12 classrooms and home schools throughout the country by providing participants a fun and exciting hands-on STEM-based contest.Technical Abstract:Integrating the photo-responsive properties of diarylethenes into hybrid crystalline systems transforms these traditionally passive materials into active materials that change their chemical or electronic响应光刺激的特性。 PIS的创新方法 - 使用环锁定的日焦甲烷建筑单元 - 确保可靠且可预测的光子晶体材料的合成。鉴于在可持续材料开发中延长寿命的重要性，拟议的研究还包括努力识别和了解这些系统中疲劳的根本原因。这些材料中所需和不希望的光化学反应通过晚期光谱和原位X射线衍射方法精确监测。这些实验在分子光化学和提出的杂化晶体固体的光体物理学之间提供了至关重要的联系。可以预料，通过此协作研究计划开发的设计原理和实验技术可以扩展到其他光致变色系统。外展工作通过美国水晶发展竞争的持续增长带来了全国水晶增长教室的概念。该奖项反映了NSF的法定任务，并且使用基金会的知识分子优点和更广泛的审查标准，被认为值得通过评估来获得支持。