Interstellar hydrogen bonding

Etim, Emmanuel E and Gorai, Prasanta and Das, Ankan and Chakrabarti, Sandip K and Arunan, Elangannan (2018) Interstellar hydrogen bonding. In: ADVANCES IN SPACE RESEARCH, 61 (11). pp. 2870-2880.

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Abstract

This paper reports the first extensive study of the existence and effects of interstellar hydrogen bonding. The reactions that occur on the surface of the interstellar dust grains are the dominant processes by which interstellar molecules are formed. Water molecules constitute about 70% of the interstellar ice. These water molecules serve as the platform for hydrogen bonding. High level quantum chemical simulations for the hydrogen bond interaction between 20 interstellar molecules (known and possible) and water are carried out using different ab-intio methods. It is evident that if the formation of these species is mainly governed by the ice phase reactions, there is a direct correlation between the binding energies of these complexes and the gas phase abundances of these interstellar molecules. Interstellar hydrogen bonding may cause lower gas abundance of the complex organic molecules (COMs) at the low temperature. From these results, ketenes whose less stable isomers that are more strongly bonded to the surface of the interstellar dust grains have been observed are proposed as suitable candidates for astronomical observations. (C) 2018 COSPAR. Published by Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	ADVANCES IN SPACE RESEARCH
Publisher:	ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Additional Information:	Copy right for this article belong to ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	05 Jun 2018 14:07
Last Modified:	05 Jun 2018 14:07
URI:	http://eprints.iisc.ac.in/id/eprint/59943

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