N,N′-Diisopropyl- and N,N′-dicyclohexylthiourea cadmium(II) complexes as precursors for the synthesis of CdS nanoparticles |
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| Authors: | N. Moloto,N. Revaprasadu,M.J. Moloto,P. O&rsquo Brien,M. Helliwell |
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| Affiliation: | 1. Department of Chemistry, University of Zululand, Private Bag x1001, KwaDlangezwa 3886, South Africa;2. Department of Chemistry, The Manchester Materials Science Centre, The University of Manchester, Oxford Road, Manchester M13 9PL, UK |
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| Abstract: | Crystals of the cadmium(II) complexes of N,N-diisopropylthiourea and N,N-dicyclohexylthiourea were obtained and their X-ray single crystal structures determined. These complexes are air-stable, easy to prepare and inexpensive and decompose cleanly to give good quality crystalline CdS. The nanoparticles of CdS thus obtained showed quantum confinement effects in their optical spectra, with close to band-edge emission in luminescence experiments. The broad diffraction patterns observed are typical of nanodimensional particles. The variation of concentration of precursor-to-HDA ratio change the isolated materials from spheres to rod-shaped. TEM images showed agglomerates of needle-like plate of particles. |
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| Keywords: | N,N-Diisopropylthiourea N,N-Dicyclohexylthiourea Crystal structure CdS nanoparticles Precursor |
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