Hydrogen-Bond Interactions and Imaging of Natural Ice

天然冰的氢键相互作用和成像

• 批准号: 0844986
• 负责人: Mary Jane Shultz
• 金额: $ 43.48万
• 依托单位: Tufts University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-04-01 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0844986&HistoricalAwards=false
• 关键词: Hydrogen; Bond; Interactions; Imaging; Natural

The Analytical and Surface Chemistry (ASC) program of the Division of Chemistry will support the research program of Prof. Mary Jane Shultz of Tufts University. Prof. Shultz and her students will develop and employ sum frequency generation (SFG) spectroscopy and microscopy to study the interactions between gas phase adsorbates and water and ice interfaces. SFG spectroscopy studies will be used to associate features in the largely unexplored hydrogen bonding region of the IR spectrum with specific binding of adsorbates to the ice surface. SFG microscopy studies will be used to differentiate reactions at defects such as grain boundaries from those on the ice crystal faces. The project is of great environmental importance since molecular level encounters between adsorbates and water or ice determine the fate of substances that are released to the atmosphere. These include, for rexample chloro-fluoro carbons that ultimately form a hole in the ozone layer and combustion generated oxides that acidify the environment. The project will provide excellent training opportunities to students in an area of great importance to society. In addition, Prof. Shultz and her students will use advanced imaging and visualization techniques to educate K-12 students about environmental processes that involve water and ice surfaces.

化学系的分析和表面化学(ASC)计划将支持塔夫茨大学玛丽·简·舒尔茨教授的研究计划。舒尔茨教授和她的学生将开发并使用和频率产生(SFG)光谱和显微镜来研究气相吸附物与水和冰界面之间的相互作用。SFG光谱研究将被用来将红外光谱中基本上未被探索的氢键区的特征与吸附物与冰表面的特定结合联系起来。SFG显微镜研究将用于区分晶界等缺陷上的反应与冰晶面上的反应。该项目对环境具有重大意义，因为吸附物与水或冰之间的分子水平相遇决定了释放到大气中的物质的命运。例如，这些包括最终在臭氧层上形成空洞的氯氟碳，以及燃烧产生的使环境酸化的氧化物。该项目将在一个对社会具有重要意义的领域为学生提供极好的培训机会。此外，舒尔茨教授和她的学生将使用先进的成像和可视化技术来教育K-12学生关于涉及水和冰表面的环境过程。