Organotin unsymmetric dithiocarbamates: synthesis, formation and characterisation of tin(II) surfide films by atmospheric pressure chemical vapour deposition

摘要

A series of tin unsymmetric dithiocarbamate complexes have beenmade from metathesis reaction of [CH_3(C_4H_9)NSC_2]Li and R_2SnCl_(4-n); [R_nSn(S_2CN(C_4H_9)CH_3)_(4-n)] [n = 3, R = Me (1), Bu (2), Ph (3); n = 2, R = Me (4), Bu(5), Ph (6); n = 1, R = Me(7), Bu (8), Ph(9)]. The complexes were characterised by microanalysis, ~(13)C, ~1H and ~(119)Sn NMR, Mossbauer and, in the case of 3, by X-ray diffraction, which revealed one short Sn-S [2.4631(9) A] and one long Sn-S interaction [3.084(1) A] indicative of a weakly chelating dithiocarbamate ligand. Atmospheric pressure chemical vapour deposition using 1 and 8 with H_2S at 350-550 deg C produced SnS and Sn_2S_3 films on glass substrates. The tin sulfides were analysed by Raman, EDAX, Sem and band gap measurements. Growth rates were of the order of 150 nm min~(-1).