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- W1607304324 abstract "In the coming decade, UV spectroscopy of Titan's atmosphere should appear as a powerful diagnostic tool which is likely to complement IR and microwave spectroscopy and future in situ experiments in the study of organic chemical processes which, on the Earth, could have led to the emergence of life. However, the interpretation of albedo spectra in the mid-UV range is critically dependent on the knowledge of the absorption coefficient of molecular compounds likely to absorb the scattered solar radiation at these wavelengths. Among them, propynenitrile is a key molecule in prebiotic synthesis and 2-butynenitrile is another simple acetylenic molecule: both present intense absorption in the UV. This first paper in a series aimed at interpreting observational data presents spectra of these two acetylenic nitriles obtained in the laboratory at room temperature between 185 and 250 nm and at resolutions from a few tenths of a nanometer up to 0.02 nm. Vibrational analysis of the 2-butynenitrile spectrum is presented for the first time. Also in the case of propynenitrile, some assignments are new relative to the previous work of V.A. Job and G.W. King (1966b, J. Mol. Spectrosc. 19, 178–184). From the analysis it is concluded that the excited state of the corresponding band system is a 1Δ, rather than a 1Σ−, a possibility considered as equally possible in the paper of Job and King." @default.
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- W1607304324 date "1989-03-01" @default.
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- W1607304324 title "UV spectroscopy of Titan's atmosphere, planetary organic chemistry, and prebiological synthesis" @default.
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- W1607304324 doi "https://doi.org/10.1016/0019-1035(89)90068-7" @default.
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