Cluster self-assembly and anion binding by metal complexes of non-innocent thiazolidinyl–thiolate ligands

Riffel, Madeline N; Siegel, Lukas; Oliver, Allen G.; Tsui, Emily Y.

doi:10.1039/d2dt01339h

Cited by 1 publication

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“…First, as Me 3 SiOTf readily silylates carboxylic acids in the presence of base, Me 3 SiOTf can silylate surface-bound oleate or other carboxylates to form the corresponding trimethylsilyl carboxylate. Second, Me 3 SiOTf can also effect anion exchange reactions, and alkylammonium halide ion pairs in solution can undergo anion exchange to form alkylammonium trifluoromethanesulfonate and the corresponding Me 3 SiX compound. Third, it may be possible for Me 3 SiOTf to directly abstract halide ions from the CsPbX 3 NC lattice itself, likely resulting in NC etching or degradation.…”

Section: Introductionmentioning

confidence: 99%

Stability Effects of Selective Anion Abstraction from Cesium Lead Halide Perovskite Nanocrystals

Stoffel

Tsui

2023

J. Phys. Chem. C

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The dynamic surface chemistry and stabilization of cesium lead halide perovskite nanocrystals (NCs) remain principal challenges for the use of these materials in many applications. Here, trimethylsilyl trifluoromethanesulfonate (Me 3 SiOTf) was used as a Lewis acidic reagent for quantitative and irreversible silylation and removal of anionic ligands from colloidal oleate-and oleylamine-capped CsPbBr 3 and CsPbCl 3 NCs. 1 H NMR and FTIR spectroscopies, combined with elemental analysis, show strong binding of a population of anionic ligands to the NC surfaces. Surface anion exchange for trifluoromethanesulfonate also results in an increase in photoluminescence quantum yields. For CsPbCl 3 NCs, Me 3 SiOTf treatment abstracts chlorides and destabilizes the NC lattice. The thermodynamic differences between these reactions and their implications are discussed.

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Section: Introductionmentioning

confidence: 99%

Stability Effects of Selective Anion Abstraction from Cesium Lead Halide Perovskite Nanocrystals

Stoffel

Tsui

2023

J. Phys. Chem. C

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Cluster self-assembly and anion binding by metal complexes of non-innocent thiazolidinyl–thiolate ligands

Abstract: Self-assembled thiolate-bridged trimers supported by a redox-active and proton-switchable ligand can hydrogen-bond anions.

Cited by 1 publication

References 44 publications

Stability Effects of Selective Anion Abstraction from Cesium Lead Halide Perovskite Nanocrystals

Stability Effects of Selective Anion Abstraction from Cesium Lead Halide Perovskite Nanocrystals

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