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.

德克萨斯理工大学的Edward Quitevis得到实验物理化学计划的支持，研究纳米结构组织在室温离子液体（RTIL）分子间动力学中的作用。 主要的方法将是使用光学克尔效应（OKE）光谱探测RTIL动态。 第一部分研究了RTIL在体相中的行为，并解决了以下问题：（1）当没有纳米结构组织时，RTIL中的分子间动力学如何不同？(2)如果电荷排序起着关键作用，在确定分子间动力学的二元混合物，OKE光谱的混合物是非加性的，如果RTIL组件有一个共同的阳离子，但不同的阴离子相同的大小？(3)是否存在一个温度，在该温度以上，与温度无关的OKE光谱变得与温度相关？(4)如果RTIL组分具有共同的阴离子但具有不同烷基链长度的阳离子，那么二元混合物仍将是纳米结构组织的吗？ 第二部分研究了RTIL在纳米多孔硅溶胶-凝胶玻璃中的行为。 这里要解决的问题是，在体相中纳米结构组织的RTIL是否仍然保持在硅溶胶-凝胶玻璃孔中的组织，以及纳米结构组织是否可以通过改变孔径或改变孔表面的化学性质来控制。预计结果将揭示RTIL的结构-功能关系的理解，因此影响技术上的重要领域，其中有越来越多的兴趣，在电解质具有高电导率和良好的机械稳定性，并在nano-liquid catalysis. RTIL的性能，使他们成为许多挥发性有机液体的潜在替代品目前用作溶剂的研究。离子液体溶剂的工业应用可以消除目前常用的挥发性溶剂所带来的健康和环境风险。 对RTIL结构-功能关系的理解将对那些寻求理解离子液体并将其用于特定应用的人具有实际意义。除了技术优势，该项目还包括一个强大的教育组成部分，将为本科生，研究生和博士后研究人员提供研究培训。 PI已经制定了一个试点计划，以招募代表性不足的少数民族学生谁将参加夏季本科生研究活动，在他的小组在得克萨斯理工大学。