Vacuum ultraviolet photoabsorption spectra of icy isoprene and its oligomers.
Spectrochim Acta A Mol Biomol Spectrosc
; 268: 120586, 2022 Mar 05.
Article
em En
| MEDLINE
| ID: mdl-34872862
ABSTRACT
Isoprene and its oligomers, terpenes, are expected to be present, along with other complex organic molecules in the diverse environments of the ISM and in our solar system. Due to insufficient spectral information of these molecules at low temperature, detection and understanding the importance of these molecules has been rather incomplete. For this purpose, we have carried out the vacuum ultraviolet (VUV) photoabsorption measurements on pure molecular ices of isoprene and a few simple terpenes limonene, α-pinene and ß-pinene by forming icy mantles on cold dust analogs. From these experiments, we report the first low temperature (10 K) VUV spectra of isoprene and its oligomers limonene, α-pinene and ß-pinene. VUV photoabsorption spectra of all the molecules reported here reveal similarities in the ice and gas phase as expected, with an exception of isoprene where a prominent red shift is observed in the ice phase absorption. This unqiue property of isoprene along with distinctive absorption at longer wavelengths supports its candidature for detection on icy bodies.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Butadienos
/
Hemiterpenos
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article