Mid-infrared vibrational study of deuterium-containing PAH variants
Buragohain, Mridusmita; Pathak, Amit; Sarre, Peter; Onaka, Takashi; Sakon, Itsuki
Polycyclic Aromatic Hydrocarbon (PAH) molecules have been long proposed to be a major carrier of ‘Unidentified Infrared’ (UIR) emission bands that have been observed ubiquitously in various astrophysical environments. These molecules can potentially be an efficient reservoir of deuterium. Once the infrared properties of the deuteriumcontaining PAHs are well understood both experimentally and theoretically, the interstellar UIR bands can be used as a valuable tool to infer the cause of the deuterium depletion in the ISM.
Density Functional Theory (DFT) calculations have been carried out on deuteriumcontaining ovalene variants to study the infrared properties of these molecules. These include deuterated ovalene, cationic deuterated ovalene, deuteronated ovalene and deuterated-deuteronated ovalene. We present a D/H ratio calculated from our theoretical study to compare with the observationally proposed D/H ratio.
|Journal Article Type||Article|
|Publication Date||Nov 15, 2016|
|Journal||Planetary and Space Science|
|Peer Reviewed||Peer Reviewed|
|APA6 Citation||Buragohain, M., Pathak, A., Sarre, P., Onaka, T., & Sakon, I. (2016). Mid-infrared vibrational study of deuterium-containing PAH variants. Planetary and Space Science, 133, https://doi.org/10.1016/j.pss.2016.05.001|
|Keywords||PAH; Interstellar molecules; IR spectra; Unidentified infrared bands; Astrochemistry|
|Copyright Statement||Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0|
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0
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