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

在这个由地球科学理事会化学部门的实验物理化学项目和大气科学部门的大气化学项目资助的奖项中，加州大学圣地亚哥分校的Amitabha Sinha教授和他的研究生和本科生同事将研究气相有机过氧化物的分子内动力学，这些物质已经被激发到高激发的振动泛音水平。这些研究的目标是更深入地了解这些对大气重要的分子中的能量是如何流动的，并更好地了解这些分子在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的大气中分解，产生反应性的HOx物质，这些物质有助于大气的氧化能力。这些物种在清除污染物方面起着重要作用。更好地了解大气中过氧化物的光化学性质将有助于建立更好的计算机模型。除了这些研究对化学物理和大气化学产生更广泛的科学影响外，辛哈教授还将通过与其他研究小组（例如普渡大学约瑟夫·弗朗西斯科教授的理论小组）的广泛合作，继续为他的研究生提供宝贵的教育机会。

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.)