Abstract
The preparation, spectra of absorption and fluorescence, and the scintillation properties of 28 derivatives of trans,trans‐p‐distyrylbenzene are described. Most of the soluble derivatives are efficient primary scintillators in alkylbenzene solutions and are highly efficient secondary scintillators in alkylbenzene solution of p‐terphenyl. Solutions with efficiencies exceeding those of the best‐reported liquid scintillation systems are described.