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State selected studies of vibrational photochemistry and dissociation dynamics of atmospheric molecules

大气分子振动光化学和解离动力学的国家精选研究

基本信息

批准号：
0642640
负责人：
Amitabha Sinha
金额：
$ 47.84万
依托单位：
University of California-San Diego
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：
2007-08-01 至 2012-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0642640&HistoricalAwards=false
关键词：
State selected studies vibrational photochemistry

项目摘要

In this award, funded by the Experimental Physical Chemistry Program of the Chemistry Division and the Atmospheric Chemistry Program of the Atmospheric Sciences Division of the Geosciences Directorate, Prof. Amitabha Sinha of the University of California - San Diego and his graduate and undergraduate student colleagues will study the intramolecular dynamics of gas-phase organic peroxide species, which have been excited to highly-excited vibrational overtone levels. The goals of these studies are to develop a firmer understanding of how energy flows in these atmospherically important molecules, and to gain a better understanding of what these molecules' fates are in the atmosphere, after they absorb solar radiation.Organic peroxide molecules fall apart in the earth's atmosphere to give reactive HOx species that contribute to the oxidizing capacity of the atmosphere. These species play important roles in the removal of pollutants. A better understanding of the photochemistry of peroxides in the atmosphere will lead to better computer models. In addition to the broader scientific impacts of these studies on chemical physics and atmospheric chemistry, Prof. Sinha will continue to provide valuable educational opportunities for his research students through his extensive collaborations with other research groups (e.g. Prof. Joseph Francisco's theory group at Purdue University.)

在这个由地球科学理事会化学部实验物理化学计划和大气科学部大气化学计划资助的奖项中，加州-圣地亚哥大学的Amitabha Sinha教授及其研究生和本科生同事将研究气相有机过氧化物物种的分子内动力学，其已经被激发到高激发振动泛音水平。这些研究的目的是更好地理解这些重要的大气分子中的能量流动，以及这些分子吸收太阳辐射后在大气中的命运。有机过氧化物分子在地球大气中分解，产生活性HOx物质，有助于大气的氧化能力。这些物种在去除污染物方面发挥着重要作用。更好地理解大气中过氧化物的光化学将导致更好的计算机模型。除了这些研究对化学物理学和大气化学产生更广泛的科学影响外，Sinha教授还将继续通过与其他研究小组（例如普渡大学的Joseph弗朗西斯科教授的理论小组）的广泛合作，为他的研究生提供宝贵的教育机会。