Experimental Studies of Electron Tunneling Through Non-Covalent Contacts in Supermolecules

超分子中非共价接触电子隧道的实验研究

基本信息

  • 批准号:
    0718755
  • 负责人:
  • 金额:
    $ 50万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2007
  • 资助国家:
    美国
  • 起止时间:
    2007-12-15 至 2011-11-30
  • 项目状态:
    已结题

项目摘要

The Organic and Macromolecular Chemistry Program at the National Science Foundation supports Professors David H. Waldeck and Christian E. Schafmeister at the University of Pittsburgh for a project that will investigate how nuclear fluctuations of chemical reactants and solvent (nuclear motion) effect the electron's motion in reactions that occur over large distances (greater than or equal to one molecule intervening between the electron donor and electron acceptor). While the understanding of electron transfer is well developed when either the electron's movement or the nuclei's movement is rate controlling, the intermediate case, in which both electron motion and nuclear motion are important, has eluded experimental study. This project will use time-resolved fluorescence spectroscopy and fluorescence correlation spectroscopy to follow the electron transfer in well-defined supermolecules that are designed to juxtapose electron donating and electron accepting units at some distance from each other so that solvent molecule(s) can occupy the intervening space ('gap'). An important extension from earlier work is the creation and study of supermolecules that are soluble in water. This feature will allow the study of electron tunneling through water molecules. A second goal is to understand how the solvent friction and the strength of electronic interaction between the reaction's partners (electronic coupling) affect the reaction rates. The model systems studied here can have their properties (distance, electronic coupling, etc) tuned so that features of theoretical models can be probed. By performing studies in water and aqueous solutions, the conditions relevant to those in biological and electrochemical systems will be studied.This project will develop the understanding and control of electron motion in supramolecular structures and encounter complexes of reactants, which is important in many areas of chemistry and biology. For example, the efficiency of electron tunneling through water molecules is essential to a mechanistic understanding of important bioenergetic processes. The results of this work will be communicated through scientific conferences and publications. The training and education of graduate and undergraduate students is the primary mechanism through which this research work will be accomplished. The students will gain expertise in modern laser methods, spectroscopy, and nanotechnology, and learn how to design experiments that test theoretical models as a method to extend our scientific understanding. A special effort to attract students from under-represented groups in chemical research will be pursued at all levels: graduate, undergraduate, and high school (via the PECAP-Investing Now program at the University of Pittsburgh and the ACS Seed Program).
美国国家科学基金会的有机和高分子化学计划支持匹兹堡大学的David H.Waldeck教授和Christian E.Schafmeister教授的一个项目,该项目将研究化学反应物和溶剂的核波动(核运动)如何影响远距离(大于或等于电子给体和电子受体之间的一个分子之间的一个分子)发生的反应中的电子运动。虽然在电子运动或原子核运动是速率控制的情况下,人们对电子转移的理解已经很成熟,但对于电子运动和原子核运动都很重要的中间情况,还没有进行实验研究。这个项目将使用时间分辨荧光光谱和荧光相关光谱来跟踪定义明确的超分子中的电子转移,这些超分子被设计成将电子供体和电子接受单元在彼此一定距离处并列,以便溶剂分子(S)可以占据中间空间(间隙)。早期工作的一个重要扩展是创造和研究可溶于水的超分子。这一特性将使研究电子在水分子中的隧穿成为可能。第二个目标是了解溶剂摩擦和反应伙伴之间的电子相互作用(电子耦合)的强度如何影响反应速度。本文所研究的模型系统可以对它们的性质(距离、电子耦合等)进行调整,从而可以探索理论模型的特征。通过在水和水溶液中的研究,将研究与生物和电化学系统相关的条件。这个项目将发展对超分子结构中电子运动的理解和控制,并遇到反应物的络合物,这在化学和生物学的许多领域都是重要的。例如,电子在水分子中的隧穿效率对于从机理上理解重要的生物能量过程是必不可少的。这项工作的成果将通过科学会议和出版物传达。研究生和本科生的培养和教育是完成这项研究工作的主要机制。这些学生将获得现代激光方法、光谱学和纳米技术方面的专业知识,并学习如何设计实验来检验理论模型,以此作为扩展我们科学理解的方法。将特别努力吸引化学研究中代表性不足群体的学生:研究生、本科生和高中(通过匹兹堡大学的PECAP-Investment Now计划和ACS SEED计划)。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

David Waldeck其他文献

David Waldeck的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

{{ truncateString('David Waldeck', 18)}}的其他基金

NSF-DFG Echem: CAS: Spin-polarized electron currents for spin-selective electrocatalysis
NSF-DFG Echem:CAS:用于自旋选择性电催化的自旋极化电子流
  • 批准号:
    2140249
  • 财政年份:
    2021
  • 资助金额:
    $ 50万
  • 项目类别:
    Standard Grant
Quantitative Studies of Chiral Induced Spin Selectivity in Amino Acids and Peptides
氨基酸和肽中手性诱导自旋选择性的定量研究
  • 批准号:
    1900078
  • 财政年份:
    2019
  • 资助金额:
    $ 50万
  • 项目类别:
    Standard Grant
NSF-BSF: Investigating Magnetic Surfaces as a New Approach to Enantioseparations
NSF-BSF:研究磁性表面作为对映体分离的新方法
  • 批准号:
    1852588
  • 财政年份:
    2019
  • 资助金额:
    $ 50万
  • 项目类别:
    Standard Grant
Experimental Studies Into Chiral Induced Spin Selectivity
手性诱导自旋选择性的实验研究
  • 批准号:
    1464701
  • 财政年份:
    2015
  • 资助金额:
    $ 50万
  • 项目类别:
    Standard Grant
Collaborative Research: Electron transfer and storage in assemblies based on nucleic acids
合作研究:基于核酸的组件中的电子转移和存储
  • 批准号:
    1412030
  • 财政年份:
    2014
  • 资助金额:
    $ 50万
  • 项目类别:
    Standard Grant
Collaborative Research: Direct Charge Transfer in Metal Containing Peptide Nucleic Acid Assemblies
合作研究:含金属肽核酸组装体中的直接电荷转移
  • 批准号:
    1057981
  • 财政年份:
    2011
  • 资助金额:
    $ 50万
  • 项目类别:
    Standard Grant
CRC: Long-Range Electron Transfer in Hybrid Inorganic-Peptide Nucleic Acid Nanoscale Assemblies
CRC:混合无机肽核酸纳米级组装体中的长程电子转移
  • 批准号:
    0628158
  • 财政年份:
    2006
  • 资助金额:
    $ 50万
  • 项目类别:
    Continuing Grant
Experimental Studies of Friction and Nuclear Motion in Electron Tunneling in Supermolecules
超分子电子隧道摩擦和核运动的实验研究
  • 批准号:
    0415457
  • 财政年份:
    2004
  • 资助金额:
    $ 50万
  • 项目类别:
    Continuing Grant
Fundamental Studies of Electron Transfer in Supramolecular Systems
超分子体系中电子传递的基础研究
  • 批准号:
    0111435
  • 财政年份:
    2001
  • 资助金额:
    $ 50万
  • 项目类别:
    Continuing Grant
NER: Molecular Controlled Electronic Devices
NER:分子控制电子设备
  • 批准号:
    0102912
  • 财政年份:
    2001
  • 资助金额:
    $ 50万
  • 项目类别:
    Standard Grant

相似海外基金

Superfluorescence, free-induction decay, and four-wave mixing: experimental and numerical studies of the propagation of free-electron laser pulses through dense atomic/ionic media
超荧光、自由感应衰变和四波混合:自由电子激光脉冲通过致密原子/离子介质传播的实验和数值研究
  • 批准号:
    19K12636
  • 财政年份:
    2019
  • 资助金额:
    $ 50万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Experimental studies on two-fluid plasmas by using lithium ion and electron plasmas
锂离子和电子等离子体双流体等离子体实验研究
  • 批准号:
    26287144
  • 财政年份:
    2014
  • 资助金额:
    $ 50万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Collaborative Research: Experimental and Theoretical/Computational Studies of Low Energy Electron Collisions with Molecules
合作研究:低能电子与分子碰撞的实验和理论/计算研究
  • 批准号:
    1305470
  • 财政年份:
    2013
  • 资助金额:
    $ 50万
  • 项目类别:
    Continuing Grant
Collaborative Research: Experimental and Theoretical/Computational Studies of Low Energy Electron Collisions with Molecules
合作研究:低能电子与分子碰撞的实验和理论/计算研究
  • 批准号:
    0968873
  • 财政年份:
    2010
  • 资助金额:
    $ 50万
  • 项目类别:
    Continuing Grant
RUI: Collaborative Research: Experimental and Theoretical/Computational Studies of Low Energy Electron Collisions with Molecules
RUI:合作研究:低能电子与分子碰撞的实验和理论/计算研究
  • 批准号:
    0968874
  • 财政年份:
    2010
  • 资助金额:
    $ 50万
  • 项目类别:
    Standard Grant
Collaborative Research: Experimental and Theoretical/Computational Studies of Low Energy Electron Collisions with Molecules
合作研究:低能电子与分子碰撞的实验和理论/计算研究
  • 批准号:
    0653396
  • 财政年份:
    2007
  • 资助金额:
    $ 50万
  • 项目类别:
    Standard Grant
Collaborative Research: Experimental and Theoretical/Computational Studies of Low Energy Electron Collisions with Molecules
合作研究:低能电子与分子碰撞的实验和理论/计算研究
  • 批准号:
    0653452
  • 财政年份:
    2007
  • 资助金额:
    $ 50万
  • 项目类别:
    Standard Grant
Experimental electron density studies of secondary interactions in solids
固体中二次相互作用的实验电子密度研究
  • 批准号:
    45809863
  • 财政年份:
    2007
  • 资助金额:
    $ 50万
  • 项目类别:
    Priority Programmes
Experimental Studies of Nucleon Structure using Electron Scattering
利用电子散射进行核子结构的实验研究
  • 批准号:
    317132-2005
  • 财政年份:
    2006
  • 资助金额:
    $ 50万
  • 项目类别:
    Alexander Graham Bell Canada Graduate Scholarships - Master's
Structural and electron transport investigations of functionalized carboxylic acids on Cu(110)-surfaces: experimental and ab initio studies
Cu(110) 表面官能化羧酸的结构和电子传输研究:实验和从头开始研究
  • 批准号:
    25125753
  • 财政年份:
    2006
  • 资助金额:
    $ 50万
  • 项目类别:
    Priority Programmes
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了