EXPANDING THE REALM OF INTERCALATION CHEMISTRY - THE SYNTHESIS OF GRAPHITE AND METAL DICHALCOGENIDE INTERCALATES CONTAINING AROMATIC-HYDROCARBONS AND BUCKMINSTERFULLERENE, AND THE FIRST INTERCALATES OF LAYERED METAL-HALIDES

Methods have been developed for the synthesis of novel intercalates of graphite, metal dichalcogenides (MY(2): M=Ti, Ta; Y=S, Se; M=Nb; Y=Se, Te) and metal halides CuCl2; MBr(2): M=Ni, Cu, Cd; CdI2). Aromatic hydrocarbons (pentacene (PEN), tetracene (TET), anthracene (ANT), 9,10-diohloroanthracene (DCA), and 9, 10-dibromoanthracene (DBA)) have been intercalated into graphite, and PEN, TET, ANT have been intercalated into the metal dichalcogenides. Dibenzotetrathiafulvalene has been intercalated into MY(2) (M = Ti, Ta; Y = S, Se). In addition, C-60 intercalates of TaS2 and graphite have been prepared. Tetracyanotetrathiafulvalene was intercalated into 5 metal dihalides, forming the first known intercalates of these materials. The intercalates were structurally analyzed by X-ray powder diffraction, and the compositions determined experimentally. For all intercalates, the observed stoichiometries were in good agreement with those predicted from the X-ray data. The results of resistivity and magnetic susceptibility measurements on the intercalates are summarized.