Laboratory Investigations into the Spectra and Origin of Propylene Oxide: A Chiral Interstellar Molecule

R. L. Hudson, M. J. Loeffler, K. M. Yocum

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Propylene oxide was recently identified in the interstellar medium, but few laboratory results are available for this molecule to guide current and future investigations. To address this situation, here we report infrared spectra, absorption coefficients, and band strengths of solid propylene oxide along with the first measurement of its refractive index and a calculation of its density, all for the amorphous solid form of the compound. We present the first experimental results showing a low-temperature formation pathway for propylene oxide near 10 K in interstellar ice analogs. Connections are drawn between our new results and the interstellar molecules propanal and acetone, and predictions are made about several as yet unobserved vinyl alcohols and methylketene. Comparisons are given to earlier laboratory work and a few applications to interstellar and solar system astrochemistry are described.

Original languageEnglish (US)
Article number225
JournalAstrophysical Journal
Volume835
Issue number2
DOIs
StatePublished - Feb 1 2017
Externally publishedYes

Keywords

  • astrobiology
  • astrochemistry
  • ISM: molecules
  • molecular data
  • molecular processes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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