Synthesis and characterisation of titanium pyridine- and pyrimidine-thiolates and their application as precursors to titanium disulfide

The reaction of TiCl4 with pyridine- and pyrimidine-thiol has been investigated. Reaction of TiCl4 with 3 equiv. of 2-mercaptopyridine and 3 equiv. of tert-butylpyridine in toluene at room temperature resulted in the formation of the tris(pyridine-2-thiolate) complex [TiCl(SC5H4N)3] (1). The related reaction between TiCl4 with 3 equiv. of 2-mercaptopyrimidine and 3 equiv. of tert-butylpyridine in toluene at room temperature resulted in the isolation of the complex [TiCl(SC4H3N2)3] (2). Compound 2 has been characterised by X-ray crystallography. Low pressure CVD of 1 and 2 produced brown/gold films of TiS2/TiO2 on glass substrates at 550 and 600 °C.

Low pressure chemical vapour deposition (LPCVD) of [TiCl(SC5H4N)3] forms thin films of TiS2 at 600 °C and TiS2/TiO2 films at 500 °C. LPCVD of [TiCl(SC4H3N2)3] resulted in TiS2 films contaminated with Cl, C and N.Figure optionsDownload as PowerPoint slide