High resolution IR spectroscopy of acetylene-furan in ultracoldhelium nanodroplets

• Published in: The Journal of chemical physics 2008-09, Vol.129 (11), p.114307-114307-7
• Main Authors: Metzelthin, Anja, Birer, Özgür, Sánchez-García, Elsa, Havenith, Martina
• Format: Article
• ISSN: 0021-9606; 1089-7690
• DOI: 10.1063/1.2976772

We have measured the IR spectrum of the acetylene-furan complex in ultracold helium nanodroplets in the region of the ν 3 C H asym -stretch vibration of the acetylene (between 3240 and 3300 cm − 1 ). We have observed eight bands that can be attributed to acetylene-furan complexes. Two of these bands are assigned to two different isomers of the 1:1 acetylene-furan complex. The vibrational band at 3267.4 cm − 1 is assigned to the C H asym -stretch vibration of the dimer structure with the C-H of the acetylene being attached to the π -system of the furan. The peak at 3272.1 cm − 1 is assigned to the C H asym -stretch vibration of the dimer structure with the C-H of the acetylene being attached to the oxygen atom of the furan. These assignments are confirmed by additional measurements of the spectrum of the C 13 -acetylene-furan complex.