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Catalytic Oxidations with Lignin-Based Ligands

木质素基配体的催化氧化

基本信息

批准号：
1856753
负责人：
Mahdi Abu-Omar
金额：
$ 48.5万
依托单位：
University of California-Santa Barbara
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-07-01 至 2023-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1856753&HistoricalAwards=false
关键词：
Catalytic Oxidations Lignin Based Ligands

项目摘要

The Catalysis Program of the Chemistry Division of the National Science Foundation supports the research program of Professor Mahdi Abu-Omar of the University of California, Santa Barbara. This project is focused on the area of sustainability or "Green Chemistry". The project seeks new ways to produce industrially important chemicals and fuels. This work is relevant to the economy of United States, the largest producer of chemical products globally. Chemical producers seek renewable starting materials. They also seek to use abundant resources when possible. Safety in a chemical process is a third consideration. These goals motivate research on chemical reactions that are environmentally friendly. Professor Abu-Omar's project uses cheap and abundant elements such as manganese and iron along with plant-based groups to form the new catalysts that in turn, speed up the desired reactions. Detailed analyses of the rates of these chemical reactions give insights into how the catalyst works on an atomic level. In support of the broader impacts of the project, Dr. Abu-Omar is actively engaged in an outreach program involving community college (CC) students, who are largely from underrepresented groups, in laboratory research. With funding from the Chemical Catalysis Program of the Chemistry Division, Dr. Mahdi Abu-Omar of the University of California, Santa Barbara (UCSB) is designing and synthesizing catalysts based on first row transition metals, specifically manganese and iron. These catalysts are further designed using lignin-based ligands (LBL). The synthesis of LBL is high yielding, atom economical, and satisfies many of the Principles of Green Chemistry. The design of LBL provides a motif that is highly suited for coordination chemistry but yet resistant to oxidative degradation. Iron- and manganese-LBL complexes are then employed to generate chlorine dioxide on-demand from chlorite in aqueous solution under ambient temperature and at neutral pH. A significant improvement in chlorine dioxide production is to avoid oxygen atom transfer (OAT) from the catalyst to chlorite to make chlorate, which is a persistent pollutant. Under investigation is the oxidation of phenanthrene and phenols (aromatic compounds) by in situ generated chlorine dioxide. In a unique approach, two catalytic cycles are coupled in tandem to achieve oxidations with dioxygen as the stoichiometric oxidant.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.

美国国家科学基金会化学部催化项目支持加州大学圣巴巴拉分校Mahdi Abu-Omar教授的研究项目。该项目侧重于可持续发展或“绿色化学”领域。该项目寻求生产工业重要化学品和燃料的新方法。这项工作与美国经济有关，美国是全球最大的化学产品生产国。化学品生产商寻求可再生原料。在可能的情况下，他们还寻求利用丰富的资源。化学过程中的安全是第三个考虑因素。这些目标激发了对环境友好的化学反应的研究。阿布-奥马尔教授的项目使用廉价和丰富的元素，如锰和铁，以及植物基基团来形成新的催化剂，反过来，加速预期的反应。对这些化学反应速率的详细分析可以使我们深入了解催化剂是如何在原子水平上起作用的。为了支持该项目产生更广泛的影响，阿布-奥马尔博士积极参与一项外展计划，让社区学院（CC）的学生参与实验室研究，这些学生主要来自代表性不足的群体。在化学部化学催化项目的资助下，加州大学圣巴巴拉分校（UCSB）的Mahdi Abu-Omar博士正在设计和合成基于第一排过渡金属的催化剂，特别是锰和铁。利用木质素基配体（LBL）进一步设计了这些催化剂。LBL的合成具有产率高、原子经济、满足绿色化学原理等特点。LBL的设计提供了一个非常适合配位化学但抗氧化降解的基序。然后利用铁和锰- lbl配合物在室温和中性ph下从水溶液中的亚氯酸盐按需生成二氧化氯。二氧化氯生产的一个重要改进是避免了氧原子从催化剂转移到亚氯酸盐以生成氯酸盐，氯酸盐是一种持久性污染物。正在调查的是菲和酚（芳香族化合物）的氧化由原位生成的二氧化氯。在一种独特的方法中，两个催化循环串联耦合以实现以双氧作为化学计量氧化剂的氧化。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。