Abstract
Buckminsterfullerenes have been conjugated to CdSe nanocrystals by exchanging trioctylphosphine oxide (TOPO) ligands on the CdSe nanocrystals with C60-bound dithiocarbamate ligands. To improve solubility of the C60-capped CdSe nanocrystals, a small molecular weight dithiocarbamate ligand was used as the coligand in the ligand-exchange reaction. The as synthesized (C60)8−CdSe conjugates were purified by dialysis against ethanol and characterized by 1H NMR, UV−vis, and transmission electron microscopy. Photoelectrochemistry of a film cast from the (C60)8−CdSe conjugate revealed a significantly enhanced photocurrent compared with the film of CdSe−TOPO nanocrystals as well as that of C60 alone, suggesting that our conjugation strategy is viable for efficient photoinduced charge separation, transport, and collection.
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