UV absorption cross-sections of a series of vinyl ethers

Abstract

UV absorption cross-sections of six vinyl ethers (ethyl vinyl ether, 1,4-butanediol divinyl ether, isobutyl vinyl ether, cyclohexyl vinyl ether, 4-hydroxybutylvinyl ether and diethyleneglycol divinyl ether) have been determined in the gas phase between 190 and 230 nm at 303 ± 2 K and pressures up to the corresponding saturation vapor pressures. The main band maxima of the vinyl ethers are below 200 nm with values under 8 × 10 −17 cm 2 molecule −1. The absorption vanishes above 225 nm with values of σ smaller than 1 × 10 −21 cm 2 molecule −1. Weak, overlaying vibrational progressions with spacings of 1400 cm −1 are observed for the alkyl vinyl ethers and are less pronounced for vinyl ethers with an extra O atom. Shifts of the positions and intensities are discussed on the basis of the differences in the chemical structure of this series.