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: 2003932
• 负责人: Jason Benedict
• 金额: $ 36.3万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-07-01 至 2025-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2003932&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，在材料研究部固态和材料化学项目的支持下，纽约州立大学布法罗大学的 Jason Benedict 副教授和新墨西哥大学的 Jeffrey Rack 教授正在开发由紫外线激活的结晶多孔材料。这些分子材料包含光活性化学基团，当暴露在光下时会改变形状。光驱动的分子转变导致晶体中的孔隙和通道改变形状和尺寸。这导致了智能材料的发展，该材料能够选择性地吸收或释放客体分子，但前提是暴露在适当波长的光下。使用超快光脉冲和/或 X 射线的实验揭示了对这些新型材料中发生的基本光化学的重要见解。该研究建立了急需的设计原则，以理解和实现下一代光响应材料的合理设计。这些教育项目包括继续举办美国晶体生长竞赛和全国性晶体生长竞赛，通过为参与者提供有趣且令人兴奋的基于 STEM 的动手竞赛，将晶体和晶体生长的概念带入全国各地的 K-12 教室和家庭学校。技术摘要：将二芳基乙烯的光响应特性集成到混合晶体系统中，将这些传统的被动材料转变为活性材料，从而改变其化学或电子特性 响应光刺激的特性。 PI 的创新方法——使用闭环二芳基乙烯结构单元——确保了光响应晶体材料的可靠且可预测的合成。鉴于延长可持​​续材料开发寿命的重要性，拟议的研究还包括努力识别和理解这些系统疲劳的根本原因。这些材料中的光化学反应（无论是需要的还是不需要的）都可以通过先进的光谱和原位 X 射线衍射方法进行精确监测。这些实验提供了分子光化学和所提出的杂化晶体固体的光物理学之间的关键联系。预计通过该合作研究项目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。通过美国晶体生长竞赛的持续发展，外展工作将晶体生长教室的概念带到了全国各地。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Nicotine Refined: Crystal Engineering of (S)-Nicotinium Malate Salts

• DOI: 10.1021/acs.cgd.1c01110
• 发表时间: 2022-01-26
• 期刊: CRYSTAL GROWTH & DESIGN
• 影响因子: 3.8
• 作者: Angevine, Devin J.;Camacho, Kristine Joy;Benedict, Jason B.
• 通讯作者: Benedict, Jason B.

Unusual single crystal to single crystal phase transition of a nicotine salt monitored using temperature dependent single crystal X-ray diffraction

• DOI: 10.1039/d3ce00042g
• 发表时间: 2023-03-20
• 期刊: CRYSTENGCOMM
• 影响因子: 3.1
• 作者: Angevine，Devin J.;Mitchell，Travis;Benedict，Jason B.
• 通讯作者: Benedict，Jason B.