Photophysics of Thiophenosalicylaldimine-functionalized G1-Polyprolyleniminato-Copper Telluride/Antimonide core-shell Nanomaterials
| dc.contributor.advisor | Iwuoha, Emmanuel I | |
| dc.contributor.author | Ramoroka, Morongwa Emmanuel | |
| dc.date.accessioned | 2018-08-14T07:57:13Z | |
| dc.date.accessioned | 2024-05-09T10:52:10Z | |
| dc.date.available | 2021-08-31T22:10:07Z | |
| dc.date.available | 2024-05-09T10:52:10Z | |
| dc.date.issued | 2018 | |
| dc.description | Magister Scientiae - MSc (Chemistry) | |
| dc.description.abstract | This work involves the synthesis of copper telluride-polypropylenimine tetra(5-(2-thienyl) salicylaldimine) (CuTe@PPI) and copper antimonide-polypropylenimine tetra(5-(2-thienyl) salicylaldimine) (CuSb@PPI) core-shell nanoparticles (NPs), using two-pots and one-pot synthesis methods, respectively. Their morphology was studied by X-ray diffraction spectroscopy (XRD), high resolution transmission electron microscopy (HRTEM) and high resolution scanning electron microscopy (HRSEM); while their structures were characterized by Fourier transform infrared spectroscopy (FTIR) and elemental analysis. Photophysical properties of the core-shell NPs were determined from ultraviolet-visible absorption spectroscopy (UV-Vis) and photoluminescence spectroscopy (PL). For core-shell NPs produced via two-pots method only CuTe@PPI exhibited ? ? ?* and n ? ?* which indicate that CuSb@PPI produced via two-pots method was unsuccessfully synthesized. The ? ? ?* and n ? ?* transitions indicate the presence of polypropylenimine tetra(5-(2-thienyl) salicylaldimine) (PPI) on the surface of CuTe NPs and CuSb NPs. FTIR confirmed coordination of PPI on the surface of CuTe NPs and CuSb NPs by showing a shift in wavenumber of C=N group bands from PPI. HR-TEM showed that the CuTe@PPI synthesized via one-pot method have a wide particles sizes distribution with an average particles size of 13.60 nm while for CuTe@PPI synthesized via two-pots it was impossible to determine the particles size due to aggregation. CuSb@PPI synthesized via twopots method and one-pot method has a wide particles sizes distribution with an average size of 7.98 nm and 11.61 nm respectively. The average particles sizes determined by HR-SEM were found to be 35.24 nm (CuTe@PPI two-pots method), 33.90 nm (CuTe@PPI one-pot method), 18.30 nm (CuSb@PPI two-pots method), and 16.18 nm (CuSb@PPI one pot method). | |
| dc.identifier.uri | https://hdl.handle.net/10566/14655 | |
| dc.language.iso | en | |
| dc.publisher | University of the Western Cape | |
| dc.rights.holder | University of the Western Cape | |
| dc.subject | Bimetallic nanoparticles, Metal-chalcogenides nanoparticles, Dendrimers, Core-shell nanoparticles, Photophysics, Photovoltaics, Electrochemical characterization, Schiff base condensation, Chemical reduction, Suzuki coupling reaction | |
| dc.title | Photophysics of Thiophenosalicylaldimine-functionalized G1-Polyprolyleniminato-Copper Telluride/Antimonide core-shell Nanomaterials |
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