Magnetic and optical properties of one-dimensional π–d system with axially substituted iron(III) phthalocyanine

Abstract We have measured the angular dependence of the ESR spectra on DMDP[Fe III 0.01 Co III 0.99 (Pc)(CN) 2 ] (DMDP=dimethyldiphenylphosphonium, Pc=phthalocyanine), which is the alloy system of magnetic Fe III and non-magnetic Co III . The spectra exhibit giant anisotropic shift in g -value of iron(III). We also report the temperature dependence of the polarized reflectance spectra of one-dimensional conductors, TPP[Fe III (Pc)(CN) 2 ] 2 and TPP[Co III (Pc)(CN) 2 ] 2 (TPP=tetraphenylphosphonium). With lowering the temperature, the plasma edge drastically shifts to a higher wavenumber in both salts.