Broadening Access to Cyclic Polymers through Better Catalyst Design and Synthesis
通过更好的催化剂设计和合成拓宽环状聚合物的获取途径
基本信息
- 批准号:2154377
- 负责人:
- 金额:$ 63.57万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2022
- 资助国家:美国
- 起止时间:2022-08-01 至 2026-07-31
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
With the support of the Chemical Catalysis program in the Division of Chemistry, Professor Adam S. Veige of University of Florida is developing new catalysts for the synthesis of cyclic polymers. Catalysts can be designed to perform many functions. In the case of polymer synthesis, the metal ion gathers the monomeric building blocks and stitches them together to create large oligomeric molecules (polymers). Synthetic polymers are used in almost every aspect of our lives and are present in the materials we use daily. The polymers are almost exclusively long molecular chains containing chain ends. The properties of polymers are dictated by both the monomeric repeating unit (i.e. the chain links) and by the chain ends. Cyclic polymers do not have chain ends. Many advantageous properties can result from the lack of chain ends. For example, these cyclic polymers generally have improved optical properties, higher melting temperature, lower friction, reduced viscosity, and smaller size. The challenge is to build polymers without chain ends. This project involves the synthesis and design of several new tungsten- and molybdenum-based catalysts that can stitch together monomers to create cyclic polymers on a large scale. Another aspect of the research focuses broadening access to these highly specialized catalysts so other researchers can expand the scope of cyclic polymer and catalyst research rapidly. The research activities associated with this award are expected to increase broadening participation and enable training of high school, undergraduate, and graduate students in catalysis chemistry. The longstanding public outreach event “Halloween Molecular Mania”, hosted by the Dr. Veige and the Center for Catalysis at the University of Florida, involves presenting science in an interactive forum to the local community. The current project aims to create new methods of communicating scientific concepts though this outreach mechanism to participating local teachers, high school students, and their parents.Under this award from the Chemical Catalysis program in the Division of Chemistry, Professor Adam S. Veige of University of Florida is developing new catalysts for the synthesis of cyclic polymers. In the first goal, a unique alkylidyne will be synthesized that has the capacity to polymerize alkynes to give new cyclic polymer materials. New ligand designs and new metalation strategies will be explored that have the potential to broaden catalyst design principles in organometallic chemistry. A second goal focuses on new strategies to build catalysts more efficiently. Existing W- and Mo-based cyclic polymer catalysts require numerous steps in their syntheses. This project aims to reduce the number of synthetic steps to three or four, thereby making such catalysts more synthetically accessible, and in this way, more readily available to other researchers working in the fields of catalysis polymer chemistry. Another catalyst project centers on building tethered alkylidene catalysts from commercial sources using a novel ligand design invented at the University of Florida. The catalyst takes advantage of a new concept in metathesis chemistry that employs a double tethered metallacyclobutane functionality. More efficient, more accessible, more selective catalysts and higher catalyst activities may well be forthcoming from this work. Students participating in this research project will gain skills and knowledge important in catalyst design, polymer synthesis, and molecular characterization.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.
在化学系化学催化项目的支持下,佛罗里达大学的Adam S.Veige教授正在开发用于合成环状聚合物的新型催化剂。催化剂可以设计成执行许多功能。在聚合物合成的情况下,金属离子聚集单体构建块并将它们缝合在一起,生成大的低聚分子(聚合物)。合成聚合物几乎应用于我们生活的方方面面,也存在于我们日常使用的材料中。聚合物几乎完全是含有链端的长分子链。聚合物的性质既由单体重复单元(即链连接)决定,也由链末端决定。环状聚合物没有链端。由于缺少链端,可能会产生许多有利的性质。例如,这些环状聚合物通常具有更好的光学性能、更高的熔融温度、更低的摩擦、更低的粘度和更小的尺寸。挑战在于制造没有链端的聚合物。该项目涉及几种新型钨和钼催化剂的合成和设计,这些催化剂可以将单体缝合在一起,形成大规模的环状聚合物。研究的另一个方面是拓宽这些高度专业化的催化剂的使用范围,以便其他研究人员能够迅速扩大环状聚合物和催化剂的研究范围。与该奖项相关的研究活动有望增加更广泛的参与,并使高中、本科生和研究生能够接受催化化学方面的培训。由Veige博士和佛罗里达大学催化中心主办的长期公共推广活动“万圣节分子狂热”,包括在一个互动论坛上向当地社区介绍科学。目前的项目旨在通过这一外展机制为参与的当地教师、高中生和他们的家长创造交流科学概念的新方法。在化学系化学催化项目的这一奖项下,佛罗里达大学的亚当·S·维格教授正在开发用于合成环状聚合物的新催化剂。在第一个目标中,将合成一种独特的亚烷基,它具有聚合乙炔的能力,从而得到新的环状聚合物材料。将探索新的配体设计和新的金属化策略,有可能拓宽有机金属化学中的催化剂设计原则。第二个目标聚焦于更有效地制造催化剂的新策略。现有的W和Mo基环状聚合物催化剂在合成过程中需要进行许多步骤。该项目旨在将合成步骤减少到三到四步,从而使此类催化剂更容易合成,从而更容易为其他从事催化聚合物化学领域的研究人员所用。另一个催化剂项目的中心是利用佛罗里达大学发明的一种新的配体设计,从商业来源制造链状亚烷基催化剂。该催化剂利用了复分解化学中的一个新概念,该概念采用了双系金属环丁烷官能团。这项工作很可能会带来更高效、更容易获得、更具选择性的催化剂和更高的催化剂活性。参与该研究项目的学生将获得催化剂设计、聚合物合成和分子表征方面的重要技能和知识。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。
项目成果
期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Improved Trianionic Pincer Ligand Synthesis for Cyclic Polymer Catalysts
改进的环状聚合物催化剂的三阴离子钳配体合成
- DOI:10.1021/acs.organomet.3c00060
- 发表时间:2023
- 期刊:
- 影响因子:2.8
- 作者:Jakhar, Vineet K.;Shen, Yu-Hsuan;Hyun, Sung-Min;Esper, Alec M.;Ghiviriga, Ion;Abboud, Khalil A.;Lester, Daniel W.;Veige, Adam S.
- 通讯作者:Veige, Adam S.
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Adam Veige其他文献
Adam Veige的其他文献
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{{ truncateString('Adam Veige', 18)}}的其他基金
Catenated, Singlet Fission, and Semi-conducting Cyclic Polymers
链状、单线态裂变和半导体环状聚合物
- 批准号:
2108266 - 财政年份:2021
- 资助金额:
$ 63.57万 - 项目类别:
Continuing Grant
Multi-anionic Pincer Ligand Catalysts and Ring Expansion Alkyne Metathesis Polymerization (REAMP)
多阴离子钳配体催化剂和扩环炔复分解聚合 (REAMP)
- 批准号:
1856674 - 财政年份:2019
- 资助金额:
$ 63.57万 - 项目类别:
Standard Grant
Ligand and Catalyst Designs for Stereocontrolled Ring Expansion Polymerization Reactions
立体控制扩环聚合反应的配体和催化剂设计
- 批准号:
1565654 - 财政年份:2016
- 资助金额:
$ 63.57万 - 项目类别:
Standard Grant
Revolutionary and Efficient Synthesis of Cyclic Polymers
环状聚合物的革命性高效合成
- 批准号:
1506850 - 财政年份:2015
- 资助金额:
$ 63.57万 - 项目类别:
Standard Grant
SusChEM: Trianionic Pincer Supported Transition Metal Complexes for Catalyzing Value-Added Reactions
SusChEM:三阴离子钳负载的过渡金属配合物用于催化增值反应
- 批准号:
1265993 - 财政年份:2013
- 资助金额:
$ 63.57万 - 项目类别:
Continuing Grant
CAREER: New Group VI Catalysts for Nitrile-Alkyne Cross Metathesis (NACM): Design, synthesis, and application of trianionic pincer ligands
职业:用于腈-炔交叉复分解(NACM)的新型 VI 族催化剂:三阴离子钳配体的设计、合成和应用
- 批准号:
0748408 - 财政年份:2008
- 资助金额:
$ 63.57万 - 项目类别:
Continuing Grant
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