Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.361, 19-24, 2001
Structure of 4,4'-dichlorobenzophenone: Implications for low temperature transport of triplet excitations
As inferred from our x-ray single-crystal diffraction data, the microscopic mechanism of the structural phase transition at 190 K in 4,4'-dichlorobenzophenone is such that certain structural imperfections must be inevitably present in the low-temperature phase. These defects can be the physical cause behind the shallow X-traps for triplet excitons. as observed in luminescence spectra.