Collaborative Research: Hydrazone-Based Solid-State Light Emitters

合作研究：基于腙的固态发光体

• 批准号: 1506170
• 负责人: Ivan Aprahamian
• 金额: $ 38.8万
• 依托单位: Dartmouth College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-08-01 至 2019-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1506170&HistoricalAwards=false
• 关键词: Collaborative; Research; Hydrazone; Based; Solid

Non-Technical AbstractReplacing widely used and highly inefficient incandescent bulbs and compact fluorescent lamps with efficient solid-state light devices can drastically reduce our total domestic energy consumption and CO2 production. This project is developing two classes of solid-state light emitters to address multiple drawbacks associated with organic material-based solid-state light emitters. To accomplish this goal, the research team is advancing the molecular level understanding of hydrazone-based solid-state light emitters using experimental and computational techniques. The two lead investigators are actively involved in educational and outreach activities that provide meaningful learning opportunities for underprivileged pre-college students in NH and VT, retain students already in the chemistry pipeline at their institutions, and engage the general public through informal science education activities. These research and outreach activities are supported by the Solid State and Materials Chemistry program in the Division of Materials Research as well as the Marcromolecular, Supramolecular, and Nanochemistry program in the Division of Chemistry.Technical AbstractThis collaborative research project employs the tools of organic and physical chemistry to advance fundamental understanding of two remarkable photophysical properties of hydrazone-based materials, namely, aggregation induced emission (AIE) and broad fluorescent bandwidths. BF2-hydrazone (BODIHY) dyes have brought about a paradigm shift in the field of solid-state light (SSL) emitters as these molecules exhibit AIE in the solid-state despite the presence of intermolecular pi-pi interactions that would seem to favor quenching. The other family of hydrazone-based materials investigated here, triazolopyridinium (TOP) salts, are blue light emitting materials with large Stokes shifts and broad fluorescent bandwidths, two properties of great potential value in advanced energy applications. The research team at Dartmouth College uses an efficient synthetic approach to prepare diverse libraries of BODIHY and TOP dyes for structure-property analyses. The photophysical properties of these BODIHY and TOP dyes are extensively characterized, both in solution and the solid-state, primarily using electronic absorption and fluorescence spectroscopies. In addition, the research team at the University of Vermont utilizes electronic structure calculations to elucidate the photophysical mechanisms of hydrazone-based dyes, and make a priori predictions regarding their fluorescent properties to expedite the discovery and development of new and efficient solid-state emitters that can be easily deployed and integrated into SSL applications. Ultimately, this project creates new, fundamental knowledge in the fields of organic and physical chemistry, which is of significant value to the materials and supramolecular chemistry communities.

具有高效的荧光灯灯和高效的荧光灯灯可以大大减少我们的总国内能源消耗和二氧化碳的生产，使用广泛使用和高效的白炽灯灯和紧凑型荧光灯。 该项目正在开发两类的固态光发射器，以解决与基于有机材料的固态光发射器相关的多个缺点。为了实现这一目标，研究团队正在使用实验和计算技术来促进基于氢氮六的固态光发射器的分子水平理解。两位主要调查人员积极参与教育和外展活动，为NH和VT中贫困的前大学学生提供有意义的学习机会，保留已经在其机构中的化学课程中的学生，并通过非正式的科学教育活动参与公众。这些研究和外展活动得到了材料研究部的固态和材料化学计划的支持，以及化学部的胶质分子，超分子和纳米化学计划。技术抽象研究项目采用了有机和物理的工具化学以促进对基于氢援助的材料的两种显着的光物理特性的基本理解，即聚集诱导的发射（AIE）和宽阔的荧光带宽。 BF2-羟基（BODIHY）染料在固态光（SSL）发射器领域带来了范式转移，尽管这些分子在固态中表现出AIE，尽管存在分子间PI-PI相互作用，但似乎似乎有利于淬灭淬灭。这里研究的另一家基于音带的材料是三氮唑吡啶丁盐（顶部）盐，是蓝光发射材料，具有较大的Stokes Shifts和宽阔的荧光带宽，这是高级能源应用中具有巨大潜在价值的两种特性。达特茅斯学院的研究团队采用有效的合成方法来准备多种多样的Bodihy和顶级染料，以进行结构 - 培训分析。这些身体染料和顶染料的光物理特性在溶液和固态中都广泛表征，主要使用电子吸收和荧光光谱。此外，佛蒙特大学的研究团队利用电子结构计算来阐明基于氢援助的染料的光物理机制，并就其荧光性能做出先验预测，以加快发现和开发新的，有效的固态发电机，这些预测可以轻松部署并集成到SSL应用程序中。最终，该项目在有机和物理化学领域创造了新的，基本的知识，这对材料和超分子化学群落具有重要价值。