Preparation and thermal degradation behaviour of a layer-type complex consisting of TaS₂ and α-naphthylamine

Abstract

A layer-type complex TaS₂ (α-naphthylamine)_0.46 having a basal spacing of 2.2 nm was prepared by soaking a mixture of the components in an ampoule at 433 K for 25 to 35 days. This complex was resealed in an ampoule after purification, followed by γ-radiation and heating to 473 K. The resulting sample was again heated at various temperatures below 1273 K. On heating to 643 K, the insertedα-naphthylamine polymerized, although with some removal from the complex, with a decrease in basal spacing to 1.35 nm. Another complex appeared faintly simultaneously. This second complex with a basal spacing of 0.96 to 0.92nm formed more abundantly on heating to 773 K and then decreased in amount at higher temperature. The complex decomposed at1273 K to result in TaS₂. Such thermal degradation behaviour is discussed from the standpoint of preparation of the layer-type complex consisting of TaS₂ and carbon.