Spectra of Benzil

Publisher Website
Google Scholar
Abstract
The polarized low‐temperature absorptionspectrum,emission spectrum, and excitation spectrum of benzil and benzil‐doped stilbene crystals have been recorded. It has been found that the 3800 Å (n–π*) band system of benzil is split by the weak interaction between the two halves of the molecule. The excitation spectrum reveals the presence of a S→T transition hidden underneath the S→S transition. The crystal spectrum of benzil‐doped stilbene is different from the benzil spectrum. The new sharp band at 4850 Å has been interpreted in terms of a trans–planar configuration of benzil. A weak (π*→n) fluorescence has been detected in this crystal.