Probing Nanostructural Organization in Room Temperature Ionic Liquids Using Optical Kerr Effect Spectroscopy

使用光学克尔效应光谱法探测室温离子液体中的纳米结构组织

• 批准号: 0718678
• 负责人: Edward Quitevis
• 金额: $ 45.41万
• 依托单位: Texas Tech University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2012-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0718678&HistoricalAwards=false
• 关键词: Probing; Nanostructural; Organization; Room; Temperature

Edward Quitevis of Texas Tech University is supported by the Experimental Physical Chemistry Program to study the role of nanostructural organization in the intermolecular dynamics of room temperature ionic liquids (RTILs). The main approach will be to use optical Kerr effect (OKE) spectroscopy to probe RTIL dynamics. The first part of the research deals with the behavior of RTILs in the bulk phase, and addresses the following questions: (1) How do the intermolecular dynamics differ in RTILs when nanostructural organization is absent? (2) If charge ordering plays a key role in determining the intermolecular dynamics of binary mixtures, will the OKE spectra of mixtures be nonadditive if the RTIL components have a common cation but different anions of the same size? (3) Is there a temperature above which temperature-independent OKE spectra become temperature-dependent? (4) Will binary mixtures still be nanostructurally organized if the RTIL components have a common anion but cations with different alkyl chain lengths? The second part of the research deals with the behavior of RTILs in nanoporous silica sol-gel glasses. The issues to be addressed here are whether RTILs that are nanostructurally organized in the bulk phase still maintain that organization in the silica sol-gel glass pores, and whether the nanostructural organization, if it exists, can be controlled by varying pore size or modifying the chemical nature of the pore surface. Outcomes are expected to shed light on the understanding of structure-function relationships in RTILs, and therefore impact technologically important areas where there is growing interest in electrolytes with high conductivity and good mechanical stability, and in the study of nanoliquid catalysis.The properties of RTILs make them potential replacements for many volatile organic liquids currently in use as solvents. Industrial use of ionic liquid solvents could eliminate the health and environmental risks that are posed by volatile solvents currently in common use. The understanding of the structure-function relationships of RTILs in the studies will be of practical used to those who seek to understand ionic liquids and tailor them for specific applications. Beyond the technological benefits, this project includes a strong educational component that will provide research training to undergraduate, graduate, and postdoctoral researchers. The PI has developed a pilot program to recruit underrepresented minority students who will participate in summer undergraduate research activities in his group at Texas Tech.

得克萨斯理工大学的爱德华·普雷维斯（Edward Sorevis）得到了实验物理化学计划的支持，该计划研究了纳米结构组织在室温离子液体（RTILS）分子间动力学中的作用。 主要方法是使用光学Kerr效应（OKE）光谱探测动力学。 研究的第一部分涉及批量阶段中RTIL的行为，并解决了以下问题：（1）当缺乏纳米结构组织时，分子间动力学在RTILS上有何不同？ （2）如果电荷排序在确定二进制混合物的分子间动力学方面起关键作用，那么如果rtil组件具有共同的阳离子但大小相同的阴离子，则混合物的OKE光谱是否会非添加？ （3）是否存在以上温度独立的OKE光谱的温度？ （4）如果rtil组分具有共同的阴离子，但阳离子的长度不同，二元混合物仍将是纳米结构的吗？ 研究的第二部分涉及纳米多孔二氧化硅溶胶 - 凝胶玻璃中RTIL的行为。 这里要解决的问题是，在散装期纳米结构组织的RTIT是否仍能保持硅胶胶玻璃孔中的组织，以及纳米结构组织是否存在，是否可以通过变化的孔径来控制，还是改变孔隙表面的化学性质。预计结果将揭示对RTIL中结构功能关系的理解，因此影响了技术上重要的领域，在这些领域中，人们对具有高电导率和良好机械稳定性的电解质以及纳米液催化的研究都越来越感兴趣。RTIT的特性使它们可以替代许多挥发性有机液体，以替代当前使用官员的许多挥发性有机液体。离子液体溶剂的工业用途可以消除当前常用的挥发性溶剂带来的健康和环境风险。 对研究中RITL的结构功能关系的理解将是实用的，对于那些寻求了解离子液体并为特定应用定制的人。除了技术利益之外，该项目还包括一个强大的教育组成部分，将为本科，研究生和博士后研究人员提供研究培训。 PI制定了一项试点计划，旨在招募代表性不足的少数族裔学生，他们将参加他在德州理工大学的小组中参加夏季的本科研究活动。