Infrared Laser Spectroscopy

红外激光光谱

• 批准号: 9700123
• 负责人: Robert Curl
• 金额: --
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-06-01 至 2001-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9700123&HistoricalAwards=false
• 关键词: Infrared; Laser; Spectroscopy

In this project supported by the Experimental Physical Chemistry Program of the Chemistry Division, Robert Curl of Rice University will investigate the high-resolution infrared spectra of reactive free radicals using infrared kinetic spectroscopy. The two species of particular interest are propargylene (HCCCH) and hydroxymethyl (CH2OH). New methods for high resolution infrared spectroscopy using difference frequency mixing of two laser sources will also be developed and applied. A sensitive high-speed infrared detector based on sum frequency generation will also be developed. Several sources of laser radiation in rugged, portable form currently exist in the visible and near infrared spectral regions. The techniques and detectors being developed under this research program will extend the accessible spectral wavelengths into infrared, which is important as a `fingerprint` region where different chemicals can be uniquely identified. Such radiation sources will be useful in many applications, from species monitoring in refinery and petrochemical industries to monitoring of the environment. The latter application is particularly unique because it allows high sensitivity detection without requiring coolants and is not affected by large amounts of environmental infrared background radiation.

在化学系实验物理化学项目的支持下，莱斯大学的罗伯特·柯尔将利用红外动力学光谱研究反应性自由基的高分辨率红外光谱。这两种特别令人感兴趣的物种是丙烯(HCCCH)和羟甲基(CH2OH)。还将开发和应用利用两个激光源差频混频的高分辨率红外光谱的新方法。还将开发一种基于和频产生的灵敏高速红外探测器。目前在可见光和近红外光谱区存在几种坚固、便携形式的激光辐射源。在这项研究计划下开发的技术和探测器将把可访问的光谱波长扩展到红外，这是一个重要的“指纹”区域，可以唯一地识别不同的化学物质。这种辐射源将在许多应用中有用，从炼油厂和石化行业的物种监测到环境监测。后一种应用特别独特，因为它允许在不需要冷却剂的情况下进行高灵敏度检测，并且不受大量环境红外背景辐射的影响。