Laboratory study of methyl isocyanate ices under astrophysical conditions.

ABSTRACT: Methyl isocyanate has been recently detected in comet 67P/ Churyumov-Gerasimenko (67P/CG) and in the interstellar medium. New physicochemical studies on this species are now necessary as tools for subsequent studies in astrophysics. In this work, infrared spectra of solid CH₃NCO have been obtained at temperatures of relevance for astronomical environments. The spectra are dominated by a strong, characteristic multiplet feature at 2350-2250 cm^-1, which can be attributed to the antisymmetric stretching of the NCO group. A phase transition from amorphous to crystalline methyl isocyanate is observed at ~ 90 K. The band strengths for the absorptions of CH₃NCO in ice at 20 K have been measured. Deuterated methyl isocyanate is used to help with the spectral assign

SUBMITTER: Mate B 

PROVIDER: S-EPMC5975948 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature