Bound-Ion Pair X-Type Ligation of Cadmium and Zinc Dithiocarbamates on Cadmium Selenide Quantum Belts br

Wurtzite CdSe quantum belts with L-typen-octylamine, L-type ammonia, or Z-type Cd(oleate)2ligands are exchanged for severalmetal-dithiocarbamate ligands [M(S2CNR1R2)2]: Cd(S2CNPhMe)2, Cd-(S2CNEt2)2, Zn(S2CNPhMe)2, and Zn(S2CNEt2)2. Successful ligandexchange with all M(S2CNR1R2)2compounds occurs from {CdSe[Cd-(oleate)2]0.19} quantum belts (QBs), which induce similar spectral shifts inthe absorption spectra of the ligand-exchanged QBs. Spectroscopic data,experimentally determined lattice strains, and ligand exchanges with[Na][Et2NCS2]and[NH4][MePhNCS2] establish that the [M-(S2CNR1R2)2] ligands bind as bound-ion-paired X-type ligands with(S2CNR1R2)-groups ligated directly to the QB surfaces and [M-(S2CNR1R2)]+groups serving as the charge-balancing ion-paired counter-cations. The X-type dithiocarbamate ligands do not impart any specialelectronic effects to the CdSe QBs.