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Bound-Ion Pair X‑Type Ligation of Cadmium and Zinc Dithiocarbamates on Cadmium Selenide Quantum Belts
journal contribution
posted on 2022-04-05, 20:14 authored by Hailey
M. Meyer, Calynn E. Morrison, Richard A. Loomis, William E. BuhroWurtzite
CdSe quantum belts with L-type n-octylamine,
L-type ammonia, or Z-type Cd(oleate)2 ligands are exchanged
for several metal-dithiocarbamate ligands [M(S2CNR1R2)2]: Cd(S2CNPhMe)2, Cd(S2CNEt2)2, Zn(S2CNPhMe)2, and Zn(S2CNEt2)2. Successful ligand exchange with all M(S2CNR1R2)2 compounds occurs from {CdSe[Cd(oleate)2]0.19} quantum belts (QBs), which induce similar
spectral shifts in the 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 countercations.
The X-type dithiocarbamate ligands do not impart any special electronic
effects to the CdSe QBs.
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special electronic effectsna ][ etgroups ligated directlycnphme )< sub2 1 successful ligand exchangetype dithiocarbamate ligandsn groups servingdithiocarbamate ligandszinc dithiocarbamatestype ligandstype ammoniaspectroscopic dataseveral metalqbs ),qb surfacespaired countercationsligand exchangescompounds occurscdse qbsabsorption spectra>- octylamine
