Nanoclusters, nanoparticles, and surfaces: Bridging the gap between homogeneous and heterogeneous catalysis.
纳米团簇、纳米颗粒和表面:弥合均相催化和非均相催化之间的差距。
基本信息
- 批准号:RGPIN-2021-03144
- 负责人:
- 金额:$ 8.81万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2022
- 资助国家:加拿大
- 起止时间:2022-01-01 至 2023-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Gold nanoparticles date from Roman times, when mixing gold salts and molten glass gave bright red glasses by the unintentional formation of nanoparticles. These procedures were used for centuries, such that all stained-glass windows contain metallic nanoparticles. Despite the high level of sophistication in modern nanomaterials synthesis, these materials are still mixtures, with structures characterized by size distributions not precise chemical formulae. Since the properties of nanomaterials are fundamentally related to size, controlling and predicting these properties will always be guess work until precision synthesis methods are developed. Metal nanoclusters are an important advance towards the goal of precision synthesis, but they are still prepared using a black box approach that makes control and prediction of structure problematic. The ubiquity of size-focusing processes that etch cluster mixtures to enable the isolation of one product illustrates a lack of control of synthetic parameters. We will approach this challenging problem through the use of well-defined metal precursors with robust, easily tunable ligands. These ligands, (N-heterocyclic carbenes: NHCs), form exceptionally strong bonds to transition elements, and, in the last 6 yrs, we have shown that they also form highly robust monolayers on planar gold surfaces. Here we explore their applicability on nanoparticles and clusters. Our goal is to design novel, logical routes to nanomaterials through the use of stable, well-defined organometallic precursors, and stoichiometric reducing agents. We will use the NHC to tune the redox potential of the starting material, and to affect the electronics of the resulting cluster. We will move away from gold, developing routes to nanoclusters and nanoparticles from non-noble metals (Cu, Pd, Ru, Fe) addressing reactions of significant importance such as CH activation, CO2 reduction and alkane metathesis. The impact will be significant since nanomaterials provide an important bridge between well understood molecular catalysts and less understood but industrially relevant heterogeneous catalysts. Structure/activity relationships obtained from nanomaterial catalysis will enable improvements in existing processes and the development of new ones such as alkane metathesis, which can convert plastic waste into valuable chemicals. This work is highly collaborative, providing exceptional learning opportunities for graduate students and PDFs. We strive to understand the techniques employed by collaborators, which translates to students learning materials characterization techniques along with materials/organometallic synthesis. We currently have internal experts in X-ray photoelectron spectroscopy, electrochemistry, synthesis and nanocluster purification/crystallization. I strongly believe in research exchanges for PhD students, which may revolve around learning new techniques, and will provide these opportunities for my students.
金纳米颗粒的历史可追溯至罗马时代,当混合金盐和熔融玻璃时,纳米颗粒的无意形成给出了鲜红色的眼镜。这些程序使用了几个世纪,以使所有彩色玻璃窗都包含金属纳米颗粒。尽管现代纳米材料的合成中具有高水平的复杂水平,但这些材料仍然是混合的,其结构由大小分布而不是精确的化学配方。由于纳米材料的性质基本上与大小有关,因此控制和预测这些特性将始终是猜测工作,直到开发精确合成方法。金属纳米簇是朝着精确合成目标的重要进步,但是它们仍在使用黑匣子方法来制备,从而使结构的控制和预测有问题。蚀刻群集混合以使一种产品的分离的尺寸关注过程的无处不在,这说明了对合成参数的缺乏控制。我们将通过使用定义良好的金属前体和可调,易于调谐的配体来解决这个挑战问题。这些配体(N-杂环碳纤维:NHC)与过渡元件形成了异常牢固的键,并且在最后6年中,我们表明它们还在平面金表面上形成了非常强大的单层。在这里,我们探索它们在纳米颗粒和簇上的适用性。我们的目标是通过使用稳定,定义明确的有机前体和化学计量的还原剂来设计新颖的逻辑路线,以纳米材料为纳米材料。我们将使用NHC调整起始材料的氧化还原电位,并影响所得群集的电子。我们将从非缺失金属(Cu,Pd,Ru,Fe)的纳米群体和纳米颗粒开发出黄金,从而解决了重要性的反应,例如CH激活,CO2还原和烷烃元理解。由于纳米材料提供了知识良好的分子催化剂和知识较少,但与工业相关的异质催化剂之间的重要桥梁,因此影响很大。从纳米材料催化获得的结构/活动关系将使现有过程和新过程的发展(例如烷烃元理)的发展,这些过程可以将塑料废物转化为有价值的化学物质。这项工作是高度协作的,为研究生和PDF提供了出色的学习机会。我们努力理解合作者使用的技术,这些技术转化为学生学习材料表征技术以及材料/有机金属合成的技术。我们目前拥有X射线光电子光谱,电化学,合成和纳米簇纯化/结晶方面的内部专家。我坚信博士生的研究交流可能围绕学习新技术,并将为我的学生提供这些机会。
项目成果
期刊论文数量(0)
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Crudden, Cathleen其他文献
New Guidelines for Presenting Electrochemical Data in All ACS Journals.
- DOI:
10.1021/acsmeasuresciau.3c00008 - 发表时间:
2023-04-19 - 期刊:
- 影响因子:0
- 作者:
Minteer, Shelley;Chen, Jingguang;Lin, Song;Crudden, Cathleen;Dehnen, Stefanie;Kamat, Prashant V;Kozlowski, Marisa;Masson, Geraldine;Miller, Scott J - 通讯作者:
Miller, Scott J
New Guidelines for Presenting Electrochemical Data in All ACS Journals.
- DOI:
10.1021/acsorginorgau.3c00009 - 发表时间:
2023-04-05 - 期刊:
- 影响因子:0
- 作者:
Minteer, Shelley;Chen, Jingguang;Lin, Song;Crudden, Cathleen;Dehnen, Stefanie;Kamat, Prashant V;Kozlowski, Marisa;Masson, Geraldine;Miller, Scott J - 通讯作者:
Miller, Scott J
2021 Nobel Laureates Recognized in Organocatalysis
- DOI:
10.1021/acscatal.1c05384 - 发表时间:
2021-12-17 - 期刊:
- 影响因子:12.9
- 作者:
Ooi, Takashi;Crudden, Cathleen - 通讯作者:
Crudden, Cathleen
Crudden, Cathleen的其他文献
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{{ truncateString('Crudden, Cathleen', 18)}}的其他基金
Nanoclusters, nanoparticles, and surfaces: Bridging the gap between homogeneous and heterogeneous catalysis.
纳米团簇、纳米颗粒和表面:弥合均相催化和非均相催化之间的差距。
- 批准号:
RGPIN-2021-03144 - 财政年份:2021
- 资助金额:
$ 8.81万 - 项目类别:
Discovery Grants Program - Individual
Critical Replacement of Super Critical Fluid HPLC for Chiral Separations
超临界流体 HPLC 用于手性分离的关键替代品
- 批准号:
RTI-2021-00129 - 财政年份:2020
- 资助金额:
$ 8.81万 - 项目类别:
Research Tools and Instruments
Novel Catalytic Transformations of Organoboron Species and the Development of Ultrastable Self-Assembled Monolayers on Metal Surfaces
有机硼物质的新型催化转化和金属表面超稳定自组装单分子层的开发
- 批准号:
RGPIN-2016-04667 - 财政年份:2020
- 资助金额:
$ 8.81万 - 项目类别:
Discovery Grants Program - Individual
Variable temperature UV/Vis spectrophotometer for study of NHC-stabilized gold nanoclusters
用于研究 NHC 稳定金纳米团簇的变温紫外/可见分光光度计
- 批准号:
RTI-2020-00059 - 财政年份:2019
- 资助金额:
$ 8.81万 - 项目类别:
Research Tools and Instruments
Novel Catalytic Transformations of Organoboron Species and the Development of Ultrastable Self-Assembled Monolayers on Metal Surfaces
有机硼物质的新型催化转化和金属表面超稳定自组装单分子层的开发
- 批准号:
RGPIN-2016-04667 - 财政年份:2019
- 资助金额:
$ 8.81万 - 项目类别:
Discovery Grants Program - Individual
相似国自然基金
基于纳米颗粒团簇等离激元的多分子间能量和关联传递研究
- 批准号:11904078
- 批准年份:2019
- 资助金额:24.0 万元
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- 资助金额:27.5 万元
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玻璃表面碳团簇包覆金属纳米颗粒复合电介质薄膜的可控制备与构效关系研究
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- 批准年份:2016
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表面等离子体共振增强超小金属簇发光及其细胞荧光标记应用的研究
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- 资助金额:24.0 万元
- 项目类别:青年科学基金项目
超细氧化铁纳米晶团簇的制备、表面修饰及生物医学应用
- 批准号:51272223
- 批准年份:2012
- 资助金额:80.0 万元
- 项目类别:面上项目
相似海外基金
CAREER: Imaging and understanding the motion and interaction of nanoparticles near surfaces
职业:成像并理解表面附近纳米颗粒的运动和相互作用
- 批准号:
2338466 - 财政年份:2024
- 资助金额:
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Continuing Grant
Dispersion control of highly luminescent oxide nanoparticles for the evaluation of mass transport in animal cells
高发光氧化物纳米粒子的分散控制,用于评估动物细胞中的传质
- 批准号:
23K17844 - 财政年份:2023
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Grant-in-Aid for Challenging Research (Exploratory)
EAGER: Design and Processing of Anti-microbial Surfaces Using Polymer Extrusion Additive Manufacturing Embedding Silver Nanoparticles with Enhanced Ion Releasing Kinetics
EAGER:使用聚合物挤出增材制造嵌入银纳米粒子并增强离子释放动力学来设计和加工抗菌表面
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2231306 - 财政年份:2022
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Standard Grant
Elucidating the impact of carbon nanoparticles and surfaces on gas hydrates and developing machine learning kinetic models
阐明碳纳米粒子和表面对天然气水合物的影响并开发机器学习动力学模型
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用于高灵敏度等离子体传感器的银纳米粒子及其基底的表面修饰
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