LEAPS-MPS: Utilizing Interband Transitions in Metallic Nanoparticles for Photocatalysis

LEAPS-MPS：利用金属纳米粒子的带间跃迁进行光催化

• 批准号: 2212960
• 负责人: Son Nguyen
• 金额: $ 24.92万
• 依托单位: University of California - Merced
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-07-01 至 2025-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2212960&HistoricalAwards=false
• 关键词: LEAPS; MPS; Utilizing; Interband; Transitions

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2). Professor Son Nguyen and the research group at the University of California at Merced intend to investigate how metallic, nanometer size particles absorb photons and accelerate chemical reactions. Through varying photon energy, observing the corresponding chemical products, and correlating the photoexcited state of the particles to the rate of product formation, the researchers intend to reveal the working mechanism of the particles. Successful implementation of the proposed work may provide some fundamental rules for preparing green materials for future chemical synthesis. The Nguyen group intends to assist under-represented students succeed in STEM fields by providing professional preparation and hands-on research experience in nanoscience and sustainable energy. These training activities are well suited to the missions of the University of California at Merced, including serving the Hispanic community and supporting first-generation college and economically disadvantaged students. In this project, the Nguyen group intends to reveal the catalytic mechanism induced by interband transitions to seek a new reaction mechanism and potential application of metallic nanoparticles via two main goals: i) establishing the catalytic mechanism and activities of hot holes for Suzuki coupling reactions and ii) expanding the catalysis of hot holes for other coupling reactions. Mesoporous nanoparticles will be utilized to solve the challenging spectral overlap of plasmon resonance and interband transitions. The plasmon resonance of the porous nanoparticles is shifted from the visible to near infrared region, allowing the Nguyen group to interrogate the photocatalysis induced by interband transitions in the visible region without spectral interference of the plasmon resonance. Control experiments with non-porous nanoparticle counterparts, in which interband transitions and plasmon resonance are spectrally overlapped, will allow the Nguyen group to differentiate the catalytic contribution from each photoexcitation regime. Several model reactions, including C-C and C-N couplings, will be studied to highlight the catalytic role and application of interband transitions. This project has the potential to stimulate research in nanomaterial-based photocatalysis and expedite the application of photochemistry for practical use.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.

该奖项是根据2021年《美国救援计划法》（公法117-2）全部或部分资助的。 Son Nguyen教授和加利福尼亚大学梅塞德分校的研究小组旨在研究金属，纳米尺寸颗粒如何吸收光子并加速化学反应。通过改变光子能量，观察相应的化学产物，并将颗粒的光激发状态与产物形成速率相关联，研究人员打算揭示颗粒的工作机制。拟议工作的成功实施可能提供一些基本规则，以准备未来化学综合的绿色材料。 Nguyen集团打算通过在纳米科学和可持续能源方面提供专业的准备和动手研究经验来协助代表性不足的学生在STEM领域取得成功。这些培训活动非常适合加利福尼亚大学默塞德分校的任务，包括为西班牙裔社区服务，支持第一代学院和经济弱势的学生。在这个项目中，Nguyen集团打算通过两个主要目标来揭示由带间过渡引起的催化机制，以寻求金属纳米颗粒的新反应机制和潜在应用：介孔纳米颗粒将用于解决等离子体共振和带间跃迁的具有挑战性的光谱重叠。多孔纳米颗粒的等离子共振从可见的红外区域转移到近红外区域，从而使Nguyen群可以询问可见的区域中带有带间跃迁引起的光催化，而没有等离子共振的光谱干扰。具有非孔纳米颗粒对应物的对照实验，其中带相互跃迁和等离子体共振在光谱重叠，将使Nguyen组可以将催化贡献与每个光激发状态区分开。将研究包括C-C和C-N耦合在内的几种模型反应，以突出显示带间过渡的催化作用和应用。该项目有潜力刺激基于纳米材料的光催化的研究，并加快光化学应用于实际用途的应用。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智力优点和更广泛的影响来通过评估来支持的。