Temperature dependence of conductivity of some partly-oxidised platinum complexes

Abstract

The conductivity of single crystals of K₂Pt(CN)₄Cl_0·32·6H₂O, K_1·6Pt(C₂O₄)xH₂O, Mg_0·82Pt(C₂O₄)5·3H₂O and K_1·74Pt(CN)₄1·8H₂O has been determined. The temperature dependence of the conductivity follows a log σ∝–(1/T)^½ relationship consistent with a phonon-assisted hopping model recently proposed. In the last complex a metal-like temperature dependence of conductivity is observed at T > 243 K, which resembles the metal–insulator transition observed in a one-dimensional organic solid.