Thermal and electrical studies of silicon phthalocyanine dichloride and tris(2,4-pentanedionato)silicon chloride hydrochloride

Abstract

Thermal analysis studies using thermogravimetry and differential thermal analysis have been carried out on the compounds tris(2,4-pentanedionato)silicon chloride hydrochloride and silicon phthalacyanine dichloride. The compound tris(2,4-pentanedionato)silicon chloride hydrochloride undergoes an endothermic reaction with loss of hydrogen chloride to give tris(2,4-pentanedionato)silicon chloride. The compounds tris(2,4-pentanedionato)silicon chloride and silicon phthalocyanine dichloride both undergo exothermic reactions with loss of the organic ligand and halogen to give silicon(IV) oxide. All of the materials exhibit a small departure from Ohm's law which is attributed to space charge effects. Under a field of 1 × 10 4 V m −1, the conductivities are all in the range 7 × 10 −8 −1.5 × 10 −7 Ω −1 m −1. The temperature dependence of conductivity is anomalous.