Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals/Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals · 1992 · 10 citations · 0 references
Abstract In order to study the solid phase struc ture effects upon mechanism of photochromic trans formations in 4,4′-bipyridine quaternary salt se ries new photochromic substances have been synthe sized and their photochromic properties studied in single crystals. X-ray studies have been carried out, and effects of molecular and crystal structu re of the substances in the ground state upon their photochromic properties were considered. Differen ces in molecular stacking have been found out for molecules with different photochemical properties.