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Phosphines Supported on Sulfated Zirconia

硫酸化氧化锆负载膦

基本信息

批准号：
1800561
负责人：
Matthew Conley
金额：
$ 42.6万
依托单位：
University of California-Riverside
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：
2018-05-01 至 2021-04-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1800561&HistoricalAwards=false
关键词：
Phosphines Supported Sulfated Zirconia

项目摘要

A vast majority of chemicals are prepared using solid catalysts in at least one step of the manufacturing process. However, these reactions are often less efficient than theoretically possible. One strategy to achieve more efficient catalytic reactions would be to generate materials with higher amounts of reaction sites on the solid surface. In this project, Dr. Matthew P. Conley of the University of California, Riverside is researching methods to realize this long-standing challenge. A key to solving this problem is a better understanding of the chemical interactions between the solid surface and these catalytically-reactive sites. Dr. Conley is involved in outreach activities related to this research to promote the engagement of underrepresented minorities in science, technology, engineering, and mathematics (STEM) disciplines. Dr. Conley is hosting students from local high schools and community colleges in his laboratory for summer internships to introduce them to the university research environment, which encourages them to enter STEM career paths. With funding from the Chemical Catalysis Program of the Chemistry Division, Dr. Matthew P. Conley of the University of California, Riverside is researching new material platforms to generate well-defined heterogeneous catalysts. This work focuses on the reaction of phosphines (R3P) with Brønsted acidic oxides, such as sulfated zirconium oxide, to generate well-defined phosphonium sites on the oxide surface. The substituents in R3P impact how strongly the phosphine binds to the sulfated zirconium oxide surface, which relates to the Brønsted acidity of surface sites on this material. The phosphonium sites react with organometallic complexes to form well-defined catalytic sites that polymerize or oligomerize ethylene, depending on the nature of the organometallic complex in the grafting reaction and the substituents on the phosphonium site. The above reactions are monitored using spectroscopic techniques, such as Fourier Transformed Infrared (FT-IR) and solid-state Nuclear Magnetic Resonance (NMR). Dr. Conley is involved in promoting STEM fields though outreach activities by bringing underrepresented minority students into the lab, in support of the broader impacts of this project. Funding from this Chemical Catalysis program enables Dr. Conley to provide summer internships to local high school students and local community college students from institutions serving predominately Hispanic populations.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.

绝大多数化学品是在制造过程的至少一个步骤中使用固体催化剂制备的。然而，这些反应的效率往往比理论上可能的要低。实现更有效的催化反应的一种策略是在固体表面产生具有更多反应位置的材料。在这个项目中，加州大学河滨分校的马修·P·康利博士正在研究实现这一长期挑战的方法。解决这个问题的一个关键是更好地了解固体表面和这些催化活性中心之间的化学相互作用。康利博士参与了与这项研究相关的外联活动，以促进未被充分代表的少数群体参与科学、技术、工程和数学(STEM)学科。康利博士正在他的实验室里招待当地高中和社区大学的学生进行暑期实习，向他们介绍大学的研究环境，这鼓励他们进入STEM职业道路。在化学部化学催化计划的资助下，加州大学河滨分校的马修·P·康利博士正在研究新的材料平台，以生成定义明确的多相催化剂。这项工作的重点是磷化氢(R3P)与Brnsted酸性氧化物的反应，如硫酸化氧化锆，以在氧化物表面生成明确的膦中心。R3P中的取代基影响膦与硫酸化氧化锆表面的结合强度，这与该材料表面位置的Brnsted酸度有关。根据接枝反应中有机金属络合物的性质和膦中心上的取代基，膦中心与有机金属络合物反应形成聚合或齐聚乙烯的明确的催化中心。使用傅立叶变换红外光谱(FT-IR)和固体核磁共振(NMR)等光谱技术对上述反应进行了监测。康利博士参与了STEM领域的推广活动，将未被充分代表的少数族裔学生带进实验室，以支持该项目的更广泛影响。来自化学催化项目的资金使康利博士能够为当地高中生和当地社区大学的学生提供暑期实习机会，这些学生来自以拉美裔人口为主的机构。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。