REACTION DYNAMICS OF IONIZED 1-METHYLPYRENE: WHY IS THE 1-METHYLENEPYRENE ION FORMED FROM H ATOM LOSS AND NOT A TROPYLIUM-CONTAINING ION?

摘要

The chemical origins of the Diffuse Interstellar Bands have remained elusive. Polycyclic aromatic hydrocarbons, PAHs have been postulated to be sources of DIBs due to the similarity between the IR emissions of the cations of PAHs and the DIBs. One molecule that has been investigated for its potential role as a DIB source is 1-methylpyrene. Previous work has suggested that, unlike toluene ions, ionized methylpyrene dissociate by H loss from the methyl group [1-5]. This study aims to find out why.