Following the recent identification of ethanethiol in the interstellar medium (ISM) we have carried out Vacuum UltraViolet (VUV) spectroscopy studies of ethanethiol (CH<inf>3</inf>CH<inf>2</inf>SH) from 10 K until sublimation in an ultrahigh vacuum chamber simulating astrochemical conditions. These results are compared with those of methanethiol (CH<inf>3</inf>SH), the lower order thiol also reported to be present in the ISM. VUV spectra recorded at higher temperature reveal conformational changes in the ice and phase transitions whilst evidence for dimer production is also presented. © 2014 AIP Publishing LLC.

Pradeep Thalappil

Department Of Chemistry

Radha Gobinda Bhuin

Conformational change

ETHANETHIOL

INTERSTELLAR MEDIUMS

METHANETHIOL

PHOTOABSORPTIONS

ULTRA-HIGH VACUUM CHAMBER

VACUUM ULTRAVIOLET SPECTROSCOPY

VACUUM ULTRAVIOLETS

physical chemistry

Fulltext

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IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Communication: Vacuum ultraviolet photoabsorption of interstellar icy thiols

Journal of Chemical Physics

Here we report the first evidence for a reversible phase change in an ethanethiol ice prepared under astrochemical conditions. InfraRed (IR) spectroscopy was used to monitor the morphology of the ice using the S[sbnd]H stretching vibration, a characteristic vibration of thiol molecules. The deposited sample was able to switch between amorphous and crystalline phases repeatedly under temperature cycles between 10 K and 130 K with subsequent loss of molecules in every phase change. Such an effect is dependent upon the original thickness of the ice. Further work on quantitative analysis is to be carried out in due course whereas here we are reporting the first results obtained. © 2017 Elsevier B.V.

Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy

Qualitative observation of reversible phase change in astrochemical ethanethiol ices using infrared spectroscopy

Chemical Physics Letters

Vacuum ultraviolet photoabsorption of pure solid ozone and its implication on the identification of ozone on Moon

The Journal of Chemical Physics

Theoretical spectroscopic characterization at low temperatures of detectable sulfur-organic compounds: Ethyl mercaptan and dimethyl sulfide

The Astrophysical Journal

SPECTROSCOPIC CHARACTERIZATION AND DETECTION OF ETHYL MERCAPTAN IN ORION

Phys. Chem. Chem. Phys.

Three milieux for interstellar chemistry: gas, dust, and ice

VACUUM ULTRAVIOLET AND INFRARED SPECTRA OF CONDENSED METHYL ACETATE ON COLD ASTROCHEMICAL DUST ANALOGS

Journal	Data powered by TypesetJournal of Chemical Physics
Publisher	Data powered by TypesetAmerican Institute of Physics Inc.
ISSN	00219606
Open Access	No