METHANOFULLERENES WITH MESOGENIC GROUPS - BULK PROPERTIES AND LANGMUIR FILMS

New C-60 derivatives functionalized with mesogenic groups have been sy nthesized. Their behaviour at the nitrogen-water interface was investi gated and appeared to depend on the nature of their functional group: if it contains a fluorinated chain, a stable monomolecular film is obt ained; if not, then a multilayer organization is observed. In the bulk state, the structural organization of the methanofullerenes has been studied by polaried optical microscopy, DSC and X-ray diffraction expe riments. At room temperature, a non-crystalline periodic structure is shown, and a phase transition leading to a viscous liquid state occurs when temperature increases. (C) 1997 Elsevier Science Ltd.