Use of Dialkyldithiocarbamato Complexes of Bismuth(III) for the Preparation of Nano- and Microsized Bi₂S₃ Particles and the X-ray Crystal Structures of [Bi{S₂CN(CH₃)(C₆H₁₃)}₃] and [Bi{S₂CN(CH₃)(C₆H₁₃)}₃(C₁₂H₈N₂)]

A range of bismuth(III) dithiocarbamato complexes were prepared and characterized. The X-ray crystal structures of the compounds [Bi{S 2 CN(CH 3 )(C 6 H 13 )} 3 ] ( 1 ) and [Bi{S 2 CN(CH 3 )(C 6 H 13 )} 3 (C 12 H 8 N 2 )] ( 2 ) are reported. The preparation of Bi 2 S 3 particulates using a wet chemical method and involving the thermalysis of Bi(III) dialkyldithiocarbamato complexes is described. The influence of several experimental parameters on the optical and morphological properties of the Bi 2 S 3 powders was investigated. Nanosized Bi 2 S 3 colloids were obtained having long-term stability and showing a blue shift on the optical band edge; the presence of particles exhibiting quantum size effects is discussed. Morphological well-defined Bi 2 S 3 particles were obtained in which the fiber-type morphology is prevalent.