Molecular Photonic Materials

分子光子材料

• 批准号: 0911558
• 负责人: Gerald Meyer
• 金额: $ 39.3万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2012-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0911558&HistoricalAwards=false
• 关键词: Molecular; Photonic; Materials

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). This research award in the Inorganic, Bioinorganic and Organometallic Chemistry program supports work by Professor Gerald Meyer at Johns Hopkins University to carry out fundamental/basic studies on molecular level events that occur at sensitized semiconductor interfaces. This work can one day lead to the efficient harvesting and storage of energy from the sun. The investigators utilize time resolved spectroscopic techniques to characterize excited states and electron transfer reactions that occur after metal-to-ligand charge-transfer (MLCT) excitation of transition metal compounds anchored to high surface area mesoporous nanocrystalline thin films comprised of the wide bandgap semiconductor anatase TiO2 or the insulator ZrO2. These studies are performed under excitation conditions where, on average, less than one excited state is created on each metal oxide nanocrystallite and under conditions representative of one sun or higher steady-state irradiances. The presence of multiple electrons in each nanocrystallite profoundly influences interfacial behavior even though the underlying principles are poorly understood. This research is directly related to a long-term goal of identifying materials that efficiently convert sunlight into useful forms of energy. If successful, an environmentally benign energy resource would be realized with an enormous economic and environmental impact. Scientifically a broad impact is assured as this proposal will train young scientists to be future professionals and forge links to interdisciplinary materials chemistry. Results from these fundamental studies are envisioned to one day enable the rational molecular-level design of integrated materials capable of harvesting sunlight, charge separation, and performing multi-electron transfer catalysis to form useful fuels.

该奖项根据 2009 年《美国复苏和再投资法案》（公法 111-5）提供资金。该无机、生物无机和有机金属化学项目的研究奖项支持约翰·霍普金斯大学杰拉尔德·迈耶教授对敏化半导体界面上发生的分子水平事件进行基础/基础研究的工作。 这项工作有一天可以实现高效地收集和储存太阳能量。 研究人员利用时间分辨光谱技术来表征固定在由宽带隙半导体锐钛矿组成的高表面积介孔纳米晶薄膜上的过渡金属化合物在金属到配体电荷转移（MLCT）激发后发生的激发态和电子转移反应。 TiO2 或绝缘体ZrO2。 这些研究是在激发条件下进行的，平均而言，每种金属氧化物纳米微晶上产生的激发态少于一个激发态，并且在代表一个太阳或更高稳态辐照度的条件下进行。 尽管人们对基本原理知之甚少，但每个纳米微晶中多个电子的存在深刻地影响了界面行为。 这项研究与确定能够有效地将阳光转化为有用能量形式的材料的长期目标直接相关。 如果成功，将实现对环境无害的能源，并产生巨大的经济和环境影响。 从科学上讲，该提案将产生广泛的影响，因为该提案将培训年轻科学家成为未来的专业人员，并与跨学科材料化学建立联系。 这些基础研究的结果预计有一天能够对集成材料进行合理的分子水平设计，这些材料能够收集阳光、电荷分离并进行多电子转移催化以形成有用的燃料。