抄録
A twin grain boundary smectic A (TGBA) phase was found for nonchiral dimers, α-4'-alkoxyphenylbenzyl-4-ylthio)-ω-(4'-alkoxyphenylbenzyl-4-ylthio) perfluoroalkanes. The generation and structure were investigated by use of DSC, polarized microscopy and X-ray diffractometry. It was inferred that the generation of TGBA is closely related with a broomerang-shape of molecules.