Intercalation of Methylamines into Titanium Disulfide

The reactions of methylamine, dimethylamine, and trimethylamine with TiS2 were characterized by several techniques. Detailed studies of the intercalation of methylamine demonstrated that the reaction was of the redox-rearrangement type, where the intercalate is best described as (CH3NH+3)yʹ (CH3NH2)yʹʹ TiS2yʹ-, with yʹ=0.25±0.02 and yʹʹ dependent on sample history. For yʹ=0.25 and yʹʹ=0.15, this intercalate is a mixed-phase stage 1 [a=3.422(5) ? and c=28.06(10) ?] and stage 2 [a=3.4265 ? and c=42.48(10) ?] compound having R m symmetry. Visual observation and thermogravimetric analysis of dimethylamine intercalation also suggest a redox-rearrangement mechanism. In contrast, no intercalation was observed for trimethylamine. The onset time for intercalation of liquid amines into TiS2 at ambient temperature follows the general trend: N2H4