Fluorescence Excitation and Dispersed Fluorescence Spectra of the First Electronic Excited (S₁) State of peri-Hexabenzocoronene (C₄₂H₁₈) Isolated in Solid para-Hydrogen.

ABSTRACT: Large polycyclic aromatic hydrocarbons (PAH) and their cationic, hydrogenated, and protonated derivatives have long been considered as promising candidates for the carriers of the diffuse interstellar bands. peri-Hexabenzocoronene (peri-HBC, C₄₂H₁₈) is a large, compact PAH, and, to the best of our knowledge, the largest centrosymmetric all-benzenoid PAH for which electronic spectroscopy data has been published. In this work, we present the dispersed fluorescence and fluorescence excitation spectra of the first electronic excited (S₁) state of peri-HBC isolated in solid para-H₂ and provide the first detailed vibronic analysis of observed features. The observed spectra agree with the emission and absorption spectra simul

SUBMITTER: Weber I 

PROVIDER: S-EPMC11215764 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature