COMPRESSIBILITY OF ONE-DIMENSIONAL PHTHALOCYANINE CONDUCTORS, NIPC(ASF6)(0.5) AND COPC(ASF6)(0.5)

Powder X-ray diffraction patterns of phthalocyanine conductors, NiPc(A sF6)(0.5) and CoPc(AsF6)(0.5), were measured under high pressure. The crystal symmetries of these compounds were maintained in the pressure range of 0 - 4.1 GPa. The contraction along the stacking axis is large r than that perpendicular to the axis. This difference becomes clear a t the pressure where the metal-ligand charge transfer occurs. The rela tion between the lattice contraction and the pressure-induced metal-li gand charge transfer is discussed.