Hybrid Halide Perovskite Materials for Photocatalytic Carbon-Carbon Bond Formation

用于光催化碳-碳键形成的混合卤化物钙钛矿材料

• 批准号: 1764142
• 负责人: Yong Yan
• 金额: $ 39万
• 依托单位: New Jersey Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-07-01 至 2018-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1764142&HistoricalAwards=false
• 关键词: Hybrid; Halide; Perovskite; Materials; Photocatalytic

Natural photosynthesis in plants stores the energy of sunlight in new carbon-carbon bonds formed from carbon dioxide. One of the grand challenges of the 21st century is to figure out how to accomplish similar chemical reactions with man-made materials known as photocatalysts. Efficient photocatalysts use low cost and abundant molecules like carbon dioxide and methane for the light-driven production of valuable organic chemicals. Scientists have been trying to develop photocatalysts using metals such as iridium or ruthenium. However, these and many of the other materials currently under examination perform poorly as photocatalysts, are expensive, are not abundant on Earth, and/or are difficult to recycle. Dr. Yong Yan of the New Jersey Institute of Technology is developing easy-to-process photocatalysts from the lead halide perovskites that are composed entirely of low cost and abundant elements. This project focuses on demonstrating that small particles of perovskite photocatalysts can help to efficiently form new carbon-carbon bonds. Professor Yan engages in outreach to students from economically disadvantaged areas, to under-represented minorities, and women. High school student interns synthesize some of the perovskite nanoparticles used for this project.With funding support from the Chemical Catalysis Program of the Chemistry Division, Dr. Yong Yan of the New Jersey Institute of Technology is developing a novel photocatalytic approach for carbon-carbon bond formation reactions using inexpensive lead halide perovskite nanoparticles. APbX3 perovskite, where A is either methylammonium or cesium and X is a halide, has displayed the potential to be an efficient and cost-effective photovoltaic material. These perovskites also show promise for photocatalytic organic synthesis due to their simple synthesis, post-reaction processability, composition from earth-abundant elements, exceptional photophysical properties, readily tunable conduction and valence bands, and high catalytic turnover numbers. Although the instability of these perovskites towards moisture hinders their application as photovoltaics, moisture sensitivity is less of a hindrance for chemical catalysis with suitable organic solvents. This project examines the stability of perovskite nanoparticles in various organic solvents and their suitability for several carbon-carbon bond formation reactions. Band edge-tuning of perovskites is used to adjust their excited-state redox potential to optimize photocatalytic organic synthesis. High school student interns synthesize some of the perovskite nanoparticles used for this project.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.

植物中的自然光合作用将阳光的能量存储在由二氧化碳形成的新碳碳键中。 21世纪的巨大挑战之一是弄清楚如何用称为光催化剂的人造材料实现类似的化学反应。有效的光催化剂使用低成本和丰富的分子（如二氧化碳和甲烷）来产生有价值的有机化学物质。科学家一直在尝试使用金属（例如虹膜或钌）开发光催化剂。但是，这些目前正在检查的其他材料作为光催化剂的效果很差，昂贵，在地球上不丰富，并且/或难以回收。新泽西理工学院的Yong Yan博士正在开发来自铅卤化物钙化盐的易于制作的光催化剂，这些光催化剂完全由低成本和丰富的元素组成。该项目的重点是证明钙钛矿光催化剂的小颗粒可以帮助有效形成新的碳碳键。 Yan教授与来自经济弱势群体的学生，代表性不足的少数民族和妇女进行宣传。高中生实习生合成了用于该项目的一些钙钛矿纳米颗粒。在化学部的化学催化计划的资金支持下，新泽西技术研究所的化学催化计划的资金支持正在开发一种新型的光催化方法，用于使用低调的Halide perovskite nananoparticles nananoparticles nananoparticles nananoparticles进行碳 - 碳键形成。 APBX3钙钛矿是A是甲基铵或剖宫产，并且X是卤化物，它表现出有效且具有成本效益的光伏材料的潜力。这些钙钛矿还显示出光催化有机合成的希望，因为它们的简单合成，后反应的加工性，来自地球丰富的元素的组成，出色的辐射特性，易于调节的传导和价带和高催化性周转倍数。尽管这些钙钛矿的不稳定性阻碍了它们作为光伏的应用，但水分敏感性并不是具有合适的有机溶剂的化学催化的障碍。该项目研究了钙钛矿纳米颗粒在各种有机溶剂中的稳定性及其对几种碳碳键形成反应的适用性。 perovskites的带边缘调节用于调整其激发氧化还原电位以优化光催化有机合成。高中生实习生合成了用于该项目的一些钙钛矿纳米颗粒。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的影响评估标准通过评估来支持的。

项目成果

Lead-Halide Perovskites for Photocatalytic α-Alkylation of Aldehydes

• DOI: 10.1021/jacs.8b08720
• 发表时间: 2019-01-16
• 期刊: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
• 影响因子: 15
• 作者: Zhu, Xiaolin;Lin, Yixiong;Yan, Yong
• 通讯作者: Yan, Yong