Infrared Laser Spectroscopy

红外激光光谱

• 批准号: 0111125
• 负责人: Robert Curl
• 金额: $ 34万
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-01 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0111125&HistoricalAwards=false
• 关键词: Infrared; Laser; Spectroscopy

Dr. Robert F. Curl of Rice University is funded for his research on infrarerd laser spectroscopy by the Physical Chemistry Program of the Chemistry Division. High resolution laser infrared spectroscopy of cyanomethylene (HCCN), hydroxymethyl, methoxy, vinoxy. and triplet vinylidene will be used to analyze the electronic structures, potential surfaces, and internal dynamics. Interest in HCCN eminates from the low activation to bending about the HCC angle; an experimentally derived potential for this bending motion will be generated. Jahn-Teller distorions in methoxy should be particularly evident in the unsymmetrical CH stretching modes. The experimentally determined potential surface will be used to elucidate the Jahn-Teller effect. Triplet vinylidene is a high energy isomer of acetylene. The rotational spectrum will be measured so that the structure of this isomer can be unequivocally assigned. The tuning range of cw quantum cascade lasers will be increased so as to make such lasers more ueful for general spectroscopic purposes by operating them in an extended cavity laser configuration. The value of the wider tuning window in infrared laser spectroscopy will be demonstrated experimentally.The use of high resolution infrared vibrational and rotational spectra in structure determinations of significant radicals provides important insight into basic bonding and structural questions. Many such radicals are important in chemical processes and are highly reactive, and are therefore difficult to analyze because of fleeting lifetimes. The studies by Dr. Curl at Rice University will provide novel measurements of such radicals that will advance our basic understanding of important chemical radicals, with respect to their structure and their reactivity.

罗伯特·F. Rice大学的Curl因其红外激光光谱研究而获得化学系物理化学项目的资助。 氰亚甲基（HCCN）、羟甲基、甲氧基、乙烯氧基的高分辨率激光红外光谱。和三重态亚乙烯基将用于分析电子结构，势面和内部动力学。 对HCCN的兴趣从低激活到关于HCC角度的弯曲，将产生这种弯曲运动的实验衍生潜力。 甲氧基的Jahn-Teller畸变在不对称CH伸缩模中特别明显。 实验确定的势面将被用来阐明Jahn-Teller效应。 三重态亚乙烯基是乙炔的高能异构体。 将测量旋转光谱，以便明确指定该异构体的结构。 连续波量子级联激光器的调谐范围将被增加，从而使这种激光器在扩展腔激光器结构中更适用于一般的光谱目的。 红外激光光谱学中较宽的调谐窗口的价值将通过实验得到证明。高分辨率红外振动和转动光谱在重要自由基结构测定中的应用为基本成键和结构问题提供了重要的见解。 许多这样的自由基在化学过程中很重要，并且具有高度反应性，因此由于寿命短暂而难以分析。 Rice University的Curl博士的研究将提供对这些自由基的新测量，这将促进我们对重要化学自由基的基本理解，包括它们的结构和反应性。