Laboratory Infrared Spectroscopic Studies of Crystalline Nitriles with Relevance to Outer Planetary Systems
✍ Scribed by N.Dello Russo; R.K. Khanna
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 797 KB
- Volume
- 123
- Category
- Article
- ISSN
- 0019-1035
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✦ Synopsis
vatory (ISO) and the Cassini mission to the Saturn system are examples of missions that will be capable of studying Complex refractive indices, n and k, and integrated absorption coefficients of strong bands were determined for thin outer planets, specifically Titan, in the far infrared. ISO, crystalline films of acetonitrile (CH 3 CN), propionitrile which will be stationed in Earth's orbit, can obtain high-(CH 3 CH 2 CN), acrylonitrile (CH 2 CHCN), hydrogen cyanide resolution spectra from 4000 to 55 cm Ϫ1 . ISO will have the (HCN) cyanogen (C 2 N 2 ), cyanoacetylene (HC 3 N), dicyanoacecapability of obtaining high-resolution spectra with high tylene (C 4 N 2 ) and cyanopropyne (CH 3 C 3 N) at 35 and 95 K in sensitivity below 200 cm Ϫ1 . Since Titan will not fill the the region 5000-80 cm ؊1 (2-125 m). This was done using field of view, ISO will acquire disk-averaged spectra of the an iterative Kramers-Kronig analysis. Integrated absorption satellite, as compared with the Cassini mission, where highcoefficients for strong bands of these crystalline nitriles were resolution, spatially resolved spectra will be obtained. also determined. These data, along with infrared data from future space missions such as the Infrared Space Observatory Thus, the concentration of organics in Titan's atmosphere and Cassini, will help in the identification and quantification can be determined as a function of latitude. Cassini is of crystalline nitriles on Titan and other outer planetary scheduled to rendezvous with the Saturn system late in bodies.