South African Journal of Science
versão impressa ISSN 0038-2353
MOLOTO, N. et al. N,N'-diisopropylthiourea and N,N'-dicyclohexylthiourea zinc(II) complexes as precursors for the synthesis of ZnS nanoparticles. S. Afr. j. sci. [online]. 2009, vol.105, n.7-8, pp. 258-263. ISSN 0038-2353.
The single X-ray crystal structures of zinc (II) complexes of N,N'-diisopropylthiourea and N,N'-dicyclohexylthiourea were determined. These complexes, similar to other alkylthioureas, were found to be effective as precursors for the preparation of hexadecylamine-capped ZnS nanoparticles. The complexes are air-stable, easy to prepare and inexpensive. They pyrolyse cleanly to give high-quality ZnS nanoparticles, which show quantum confinement effects in their absorption spectra and close to band-edge emission. Their broad diffraction patterns are typical of nanosized particles while their transmission electron microscopy images showed agglomerates of needle-like platelet nanoparticles.
Palavras-chave : N,N'-diisopropylthiourea; N,N'-dicyclohexylthiourea; synthesis; ZnS nanoparticles; precursor.