Ion exchange transformation of magic-sized clusters

Sarah L. White; Progna Banerjee; Indranath Chakraborty; Prashant K. Jain

doi:10.1021/acs.chemmater.6b03882

Ion exchange transformation of magic-sized clusters

Sarah L. White, Progna Banerjee, Indranath Chakraborty, Prashant K. Jain

Research output: Contribution to journal › Article › peer-review

Abstract

Ultrasmall semiconductor clusters are exciting materials because of their molecularly precise structures and their unique optical spectra. "Magic-sized" CdSe clusters are transformed into their Cu₂Se counterparts by means of ion exchange. We leverage the molecularly precise structure and high sensitivity of these clusters to investigate the mechanism of cation exchange. We optically identify a metastable intermediate in the solid-state transformation. Isolation and characterization of this intermediate provide insight into the dynamic structural rearrangement of the cationic sublattice in the course of cation exchange and the role of ligand passivation. Such understanding of the dynamics of ion exchange at the solid-liquid interface could help engineer improved materials for solid-state electrolytes and energy storage devices.

Original language	English (US)
Pages (from-to)	8391-8398
Number of pages	8
Journal	Chemistry of Materials
Volume	28
Issue number	22
DOIs	https://doi.org/10.1021/acs.chemmater.6b03882
State	Published - Nov 22 2016

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Chemistry

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10.1021/acs.chemmater.6b03882

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title = "Ion exchange transformation of magic-sized clusters",

abstract = "Ultrasmall semiconductor clusters are exciting materials because of their molecularly precise structures and their unique optical spectra. {"}Magic-sized{"} CdSe clusters are transformed into their Cu2Se counterparts by means of ion exchange. We leverage the molecularly precise structure and high sensitivity of these clusters to investigate the mechanism of cation exchange. We optically identify a metastable intermediate in the solid-state transformation. Isolation and characterization of this intermediate provide insight into the dynamic structural rearrangement of the cationic sublattice in the course of cation exchange and the role of ligand passivation. Such understanding of the dynamics of ion exchange at the solid-liquid interface could help engineer improved materials for solid-state electrolytes and energy storage devices.",

author = "White, {Sarah L.} and Progna Banerjee and Indranath Chakraborty and Jain, {Prashant K.}",

note = "Funding Information: Acknowledgment is made to the donors of the American Chemical Society Petroleum Research Fund for partial support of this research. We also acknowledge support of the 3M Nontenured Faculty Award. This work was carried out in part at the Frederick Seitz Materials Research Lab at the University of Illinois at Urbana-Champaign. We thank Dean Olson for help with NMR measurements. Publisher Copyright: {\textcopyright} 2016 American Chemical Society.",

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doi = "10.1021/acs.chemmater.6b03882",

language = "English (US)",

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AU - White, Sarah L.

AU - Banerjee, Progna

AU - Chakraborty, Indranath

AU - Jain, Prashant K.

N1 - Funding Information: Acknowledgment is made to the donors of the American Chemical Society Petroleum Research Fund for partial support of this research. We also acknowledge support of the 3M Nontenured Faculty Award. This work was carried out in part at the Frederick Seitz Materials Research Lab at the University of Illinois at Urbana-Champaign. We thank Dean Olson for help with NMR measurements. Publisher Copyright: © 2016 American Chemical Society.

PY - 2016/11/22

Y1 - 2016/11/22

N2 - Ultrasmall semiconductor clusters are exciting materials because of their molecularly precise structures and their unique optical spectra. "Magic-sized" CdSe clusters are transformed into their Cu2Se counterparts by means of ion exchange. We leverage the molecularly precise structure and high sensitivity of these clusters to investigate the mechanism of cation exchange. We optically identify a metastable intermediate in the solid-state transformation. Isolation and characterization of this intermediate provide insight into the dynamic structural rearrangement of the cationic sublattice in the course of cation exchange and the role of ligand passivation. Such understanding of the dynamics of ion exchange at the solid-liquid interface could help engineer improved materials for solid-state electrolytes and energy storage devices.

AB - Ultrasmall semiconductor clusters are exciting materials because of their molecularly precise structures and their unique optical spectra. "Magic-sized" CdSe clusters are transformed into their Cu2Se counterparts by means of ion exchange. We leverage the molecularly precise structure and high sensitivity of these clusters to investigate the mechanism of cation exchange. We optically identify a metastable intermediate in the solid-state transformation. Isolation and characterization of this intermediate provide insight into the dynamic structural rearrangement of the cationic sublattice in the course of cation exchange and the role of ligand passivation. Such understanding of the dynamics of ion exchange at the solid-liquid interface could help engineer improved materials for solid-state electrolytes and energy storage devices.

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Ion exchange transformation of magic-sized clusters

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