CAREER: Site-Differentiated Bimetallic Catalysts for Precise Polyolefin Synthesis

职业：用于精确聚烯烃合成的位点差异双金属催化剂

• 批准号: 1750411
• 负责人: Loi Do
• 金额: $ 62.63万
• 依托单位: University of Houston
• 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: 2018-04-01 至 2024-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1750411&HistoricalAwards=false
• 关键词: CAREER; Site; Differentiated; Bimetallic; Catalysts

Polymers are one of the most widely used man-made materials today. Their applications range from common plastic bags to life-saving medical devices. Many methods currently used to make polymers are inefficient, energy intensive, and/or require expensive raw materials. To promote more sustainable manufacturing practices, Dr. Loi Do is developing new ways to create polymers directly from naturally occurring and readily available raw materials. The key to Dr. Do's technology is the use of new catalysts that control how the raw material building blocks are connected to form polymers. This research benefits society by providing new materials that can improve our quality of life. Dr. Do is also actively involved in outreach activities that integrate his interests in industrial chemistry at the University of Houston (UH). Dr. Do is creating programs that give high school and undergraduate students the opportunity to interact with professional scientists and learn about chemistry in everyday life. Dr. Do excites students about pursuing careers in STEM fields. Dr. Do is also engaging in hands-on laboratory training and mentoring of young chemists to prepare them to become the next generation of scientific leaders. With funding from the Chemical Catalysis Program of the Chemistry Division, Dr. Do at the University of Houston (UH) is developing new sustainable routes to access technologically useful polyolefins. This research seeks to eliminate the need to use expensive alpha olefin co-monomers in the preparation of low- and medium-density polyethylene and to overcome the tendency of transition metal catalysts to be inhibited by polar vinyl olefins. Dr. Do's bimetallic catalysts take advantage of metal-metal cooperativity to achieve reactivity patterns that are distinct from those of conventional monometallic catalysts. These studies are being guided by mechanistic investigations using spectroscopic tools to interrogate the nature of observable reaction intermediates and computational methods to evaluate the energy barriers of discrete reaction steps. This work is critical to our understanding of olefin polymerization catalysis and may provide insights into where catalyst design improvements could be made. Dr. Do is also initiating educational outreach plans that will introduce young students to the chemical profession. The objectives of Dr. Do's educational activities are to make learning chemistry accessible to the general public and give chemistry majors at UH the practical skills that they need to be successful in their independent careers.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.

聚合物是当今使用最广泛的人造材料之一。它们的应用从普通的塑料袋到挽救生命的医疗设备。目前用于使聚合物的许多方法效率低下，能源密集型和/或需要昂贵的原材料。为了促进更可持续的制造实践，Loi Do博士正在开发新的方法来直接从天然发生且容易获得的原材料中创建聚合物。 Do博士技术的关键是使用新的催化剂，这些催化剂控制着如何连接原材料的构建块以形成聚合物。这项研究通过提供可以改善我们生活质量的新材料来对社会有所帮助。 DO博士还积极参与外展活动，这些活动将他在休斯顿大学（UH）的工业化学兴趣融合在一起。 Do博士正在创建计划，使高中和本科生有机会与专业科学家互动并了解日常生活中的化学反应。博士确实激发了学生从事STEM领域的职业。 DO博士还正在进行实验室培训和指导年轻化学家，以准备成为下一代科学领导者。在化学部化学催化计划的资助下，休斯敦大学（UH）的DO博士正在开发新的可持续途径，以访问技术有用的聚集素。这项研究旨在消除在制备低密度和中密度聚乙烯中使用昂贵的烯烃共同工程师的需求，并克服过渡金属催化剂的趋势，以抑制极性乙烯基烯烃。 DO博士的双金属催化剂利用金属金属合作社来实现与常规单金属催化剂不同的反应性模式。这些研究是通过使用光谱工具进行机械研究来指导的，以询问可观察到的反应中间体和计算方法的性质，以评估离散反应步骤的能量屏障。这项工作对于我们对烯烃聚合催化的理解至关重要，并且可以提供有关可以改进催化剂设计改进的见解。 DO博士还启动了教育外展计划，将向年轻学生介绍化学专业。 Do博士的教育活动的目标是使公众可以学习化学，并在UH上为他们在独立职业中取得成功所需的实践技能提供了化学专业。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审查标准来通过评估来支持的。

项目成果

Elucidating Secondary Metal Cation Effects on Nickel Olefin Polymerization Catalysts

• DOI: 10.1021/acscatal.0c02949
• 发表时间: 2020-08
• 期刊: ACS Catalysis
• 影响因子: 12.9
• 作者: T. V. Tran;L. Karas;J. Wu;L. Do

In Situ Generated Heterometallic Nickel–Zinc Catalysts for Ethylene Polymerization

原位生成异金属镍锌催化剂用于乙烯聚合

• DOI: 10.1021/acs.organomet.8b00454
• 发表时间: 2018
• 期刊: Organometallics
• 影响因子: 2.8
• 作者: Xiao, Dawei;Do, Loi H.
• 通讯作者: Do, Loi H.

Rigidifying Cation-Tunable Nickel Catalysts Increases Activity and Polar Monomer Incorporation in Ethylene and Methyl Acrylate Copolymerization

刚性化阳离子可调镍催化剂可提高乙烯和丙烯酸甲酯共​​聚反应中的活性和极性单体的掺入

• DOI: 10.1021/acs.inorgchem.1c02888
• 发表时间: 2021
• 期刊: Inorganic Chemistry
• 影响因子: 4.6
• 作者: Tahmouresilerd, Babak;Xiao, Dawei;Do, Loi H.
• 通讯作者: Do, Loi H.

Tunable modalities in polyolefin synthesis via coordination insertion catalysis

• DOI: 10.1016/j.eurpolymj.2020.110100
• 发表时间: 2020-10
• 期刊: European Polymer Journal
• 影响因子: 6
• 作者: T. V. Tran;L. Do

Development of highly productive nickel–sodium phenoxyphosphine ethylene polymerization catalysts and their reaction temperature profiles

• DOI: 10.1039/c9py00610a
• 发表时间: 2019-07
• 期刊: Polymer Chemistry
• 影响因子: 4.6
• 作者: Thi V. Tran;Yennie H. Nguyen;L. Do