Excimer formation of neat benzene derivatives studied by picosecond spectroscopy

Abstract

Neat benzene, bromobenzene, and toluene were photolyzed by a 26 ps pulse of 347.2 nm light from a mode-locked ruby laser. Transient absorptions with λ max ≈ 515, 520 and 580 nm, respectively, were observed. It is suggested that biphotonic absorption of 347.2 nm light leads to higher energy states of benzene derivatives which give excimers.