Synthesis and characterization of cadmium selenide and indium sulfide nanoparticles and their surface modification using rubidium(bipy) chloride complex

Scope and method of study. The purpose of this study was to investigate new synthetic routes to make stable CdSe and In₂S ₃ nanoparticles. On these newly synthesized nancolloids, the surface modification was attempted via the chalcogen sites. A mixed metal-ligand complex of Ru(bipy)₂Cl₂ was used for this purpose. The synthesized nanoparticles and the surface modification reaction were monitored by a changes in the UV-vis absorption spectroscopy, steady state luminescence, time resolved photoluminescence, transmission electron microscopy and nuclear magnetic resonance spectroscopy.; Findings and conclusions. Stable, water-soluble CdSe nanoparticles were synthesized with narrow size distribution. Changing the ratio of metal to chalcogen during the synthesis could easily control the sizes of the nanocolloids formed. In₂S₃ nanoparticles were synthesized with a variety of stabilizer molecules. These particles also showed strong luminescence, which had not been reported for these materials. The surface modification of CdSe and In₂S₃ nanoparticles with the ruthenium complex resulted in the formation of new bands from the electronic states of the nanoparticles and the complex. The lifetime of emission increased with the modification reaction. There was due to the formation of delocalized energy levels as a consequence of modification reaction.