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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)

基本信息

批准号：
1856674
负责人：
Adam Veige
金额：
$ 48.5万
依托单位：
University of Florida
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：
2019-08-01 至 2022-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1856674&HistoricalAwards=false
关键词：
Multi anionic Pincer Ligand Catalysts

项目摘要

The Chemical Catalysis and the Macromolecular, Supramolecular and Nanochemistry Programs of the Chemistry Division support the project by Professor Adam Veige of the University of Florida. Linear polymer are useful in numerous applications due to their electrical conductivity, optical nonlinearity, photoconductivity, gas permeability, and liquid-crystallinity. The Veige group seeks to discover new catalysts that produce cyclic versions of these polymers in order to explore new opportunities to further advance their materials properties. Because of technical problems, cyclic polymers are not currently commercially available. Professor Veige and his coworkers are focusing on making the catalysts for cyclic polymerizations more rugged and efficient. This project is also providing hands-on training for young aspiring chemists through the undergraduate research program. The Veige group hosts the annual "Chemistry Day at the Mall" event, which involves fifty graduate and undergraduate students exhibiting 25 chemistry demonstrations to nearly 500 children and their parents annually. This project focuses on the synthesis and characterization of catalysts for cyclic polymer synthesis. Ring expansion alkyne metathesis polymerization (REAMP) is unknown. The Veige group aims to prepare a tethered tungsten-alkylidyne capable of initiating the unprecedented ring expansion of cyclic alkynes. Highly nucleophilic metal-carbon multiple bonds can ring open cyclic alkenes to produce cyclic polymers. Two new pincer ligand designs may provide access to nucleophilic tungsten-alkylidynes for REMP. Finally, current catalyst synthesis routes are tedious and inefficient, so the research team seeks to synthesize highly effective Mo-based catalysts for stereoselective cyclic polymer synthesis from commercially available starting materials. Elucidating efficient synthetic strategies for ring expansion catalysts may help to realize the potential of cyclic polymers in advanced manufacturing.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.

化学催化和化学系的大分子、超分子和纳米化学项目支持佛罗里达大学的Adam Veige教授的项目。线性聚合物由于其导电性、光学非线性、光导性、气体渗透性和液晶性，在许多领域都有广泛的应用。Veige团队寻求发现产生这些聚合物的循环版本的新催化剂，以探索进一步提高其材料性能的新机会。由于技术问题，环状聚合物目前还不能在商业上获得。Veige教授和他的同事们正专注于使循环聚合的催化剂更加坚固和高效。该项目还通过本科生研究计划为有抱负的年轻化学家提供动手培训。Veige组织每年举办一次“购物中心化学日”活动，每年有50名研究生和本科生向近500名儿童和他们的家长展示25个化学演示。本项目主要研究用于环状聚合物合成的催化剂的合成和表征。扩环炔烃歧化聚合(REAMP)尚不清楚。Veige小组的目标是制备一种能够引发环炔前所未有的扩环的链状钨烷。高度亲核的金属-碳多键可以环开环状烯烃来生成环状聚合物。两种新的钳形配体设计可能为REMP提供亲核的钨-亚烷基化合物的途径。最后，目前催化剂的合成路线繁琐且效率低下，因此研究小组试图以商业上可用的原料为原料，合成用于立体选择性环状聚合物合成的高效钼基催化剂。阐明扩环催化剂的有效合成策略可能有助于实现环聚合物在先进制造中的潜力。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（5）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Correction to “Precise NMR Method for Titering Organometal Reagents”

对“滴定有机金属试剂的精确 NMR 方法”的修正

DOI：
10.1021/acs.orglett.1c02829
发表时间：
2021
期刊：
Organic Letters
影响因子：
5.2
作者：
Jakhar, Vineet K.;Johnson, Eric C.;Kavuturu, Aditya;Heller, Jessica K.;Veige, Adam S.;Ghiviriga, Ion
通讯作者：
Ghiviriga, Ion

Tethered Tungsten-Alkylidenes for the Synthesis of Cyclic Polynorbornene via Ring Expansion Metathesis: Unprecedented Stereoselectivity and Trapping of Key Catalytic Intermediates

DOI：
10.1021/jacs.0c12248
发表时间：
2021-01-08
期刊：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
影响因子：
15
作者：
Jakhar, Vineet;Pal, Digvijayee;Veige, Adam S.
通讯作者：
Veige, Adam S.

Synthesis and Characterization of Tungsten Alkylidene and Alkylidyne Complexes Featuring a New Carbazole-Based Rigid Trianionic ONO 3– Pincer-Type Ligand

以新型咔唑基刚性三阴离子ONO 3-钳型配体为特色的亚烷基钨和亚烷基钨配合物的合成和表征

DOI：
10.1021/acs.organomet.0c00150
发表时间：
2020
期刊：
Organometallics
影响因子：
2.8
作者：
Mandal, Ushnish;VenkatRamani, Sudarsan;Ghiviriga, Ion;Abboud, Khalil A.;Veige, Adam S.
通讯作者：
Veige, Adam S.

Precise NMR Method for Titering Organometal Reagents