Preparation of organic-inorganic nanocomposites using directly synthesized Br-functionalized nanocrystals

Abstract

Intimately contact organic-inorganic nanocomposites were crafted by capitalizing on robust click coupling between judiciously synthesized functionalized nanocrystals (NCs) and end-functionalized organics. The functionalized NCs were synthesized with no need for ligand exchange by directly employing bifunctional ligand (i.e., 4-bromomethyl benzoic acid) during NC synthesis steps. The synthetic condition was first explored by judiciously tailoring the ratio between aliphatic ligands and bifunctional ligands to control its morphology. Subsequent substitution of bromine moiety at the NCs into azide yielded azide-terminated NCs. Finally, ethynyl-terminated molecules were grafted onto azide-functionalized NCs surface via click coupling, forming intimately contact organic-inorganic hybrid nanocomposites. The success of grafting of CPs with NCs was substantiated by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. Hybrid inorganic-organic core-shell elongated architecture may enhance the device performance if the proper alignment of NRs can be achieved. To this end, the synthetic procedure to crafting organic-inorganic hybrid possibly can be employed to prepare variety of promising building block which can be served as a lot of applications including lasers, solar cells, and LEDs.