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Sandeno SF, Schnitzenbaumer KJ, Krajewski SM, Beck RA, Ladd DM, Levine KR, Dayton D, Toney MF, Kaminsky W, Li X, Cossairt BM. Ligand Steric Profile Tunes the Reactivity of Indium Phosphide Clusters. J Am Chem Soc 2024; 146:3102-3113. [PMID: 38254269 DOI: 10.1021/jacs.3c10203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Indium phosphide quantum dots have become an industrially relevant material for solid-state lighting and wide color gamut displays. The synthesis of indium phosphide quantum dots from indium carboxylates and tris(trimethylsilyl)phosphine (P(SiMe3)3) is understood to proceed through the formation of magic-sized clusters, with In37P20(O2CR)51 being the key isolable intermediate. The reactivity of the In37P20(O2CR)51 cluster is a vital parameter in controlling the conversion to quantum dots. Herein, we report structural perturbations of In37P20(O2CR)51 clusters induced by tuning the steric properties of a series of substituted phenylacetate ligands. This approach allows for control over reactivity with P(SiMe3)3, where meta-substituents enhance the susceptibility to ligand displacement, and para-substituents hinder phosphine diffusion to the core. Thermolysis studies show that with complete cluster dissolution, steric profile can modulate the nucleation period, resulting in a nanocrystal size dependence on ligand steric profile. The enhanced stability from ligand engineering also allows for the isolation and structural characterization by single-crystal X-ray diffraction of a new III-V magic-sized cluster with the formula In26P13(O2CR)39. This intermediate precedes the In37P20(O2CR)51 cluster on the InP QD reaction coordinate. The physical and electronic structure of this cluster are analyzed, providing new insight into previously unrecognized relationships between II-VI and III-V materials and the discrete growth of III-V cluster intermediates.
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Affiliation(s)
- Soren F Sandeno
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Kyle J Schnitzenbaumer
- Division of Natural Sciences and Mathematics, Transylvania University, Lexington, Kentucky 40508-1797, United States
| | - Sebastian M Krajewski
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Ryan A Beck
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Dylan M Ladd
- Department of Materials Science and Engineering, University of Colorado, Boulder, Colorado 80309, United States
| | - Kelsey R Levine
- Department of Materials Science and Engineering, University of Colorado, Boulder, Colorado 80309, United States
| | - Damara Dayton
- Department of Materials Science and Engineering, University of Colorado, Boulder, Colorado 80309, United States
| | - Michael F Toney
- Department of Materials Science and Engineering, University of Colorado, Boulder, Colorado 80309, United States
- Department of Chemical and Biological Engineering, Renewable and Sustainable Energy Institute, University of Colorado, Boulder, Colorado 80309, United States
| | - Werner Kaminsky
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Xiaosong Li
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Brandi M Cossairt
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
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