Photoinduced electron transfer across the polymer-capped CsPbBr 3 interface in a polar medium
Abstract
In-situ polymer capping of cesium lead bromide (CsPbBr 3 ) nanocrystals with polymethyl acrylate is an effective approach to improve the colloidal stability in the polar medium and thus extends their use in photocatalysis. The photoinduced electron transfer properties of polymethyl acrylate (PMA)-capped CsPbBr 3 nanocrystals have been probed using surface-bound viologen molecules with different alkyl chains as electron acceptors. The apparent association constant ( K app ) obtained for the binding of viologen molecules with PMA-capped CsPbBr 3 was 2.3 × 10 7 M −1 , which is an order of magnitude greater than that obtained with oleic acid/oleylamine-capped CsPbBr 3 . Although the length of the alkyl chain of the viologen molecule did not show any impact on the electron transfer rate constant, it influenced the charge separation efficiency and net electron transfer quantum yield. Viologen moieties with a shorter alkyl chain length exhibited a charge separation efficiency of 72% compared with 50% for the longer chain alkyl chain length viologens. Implications of polymer-capped CsPbBr 3 perovskite nanocrystals for carrying out photocatalytic reduction in the polar medium are discussed.
- Authors:
-
[1];
[2];
[2];
[3]
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, USA, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, USA, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA, Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1969144
- Grant/Contract Number:
- FC02-04ER15533; CHE-1554519
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Journal of Chemical Physics
- Additional Journal Information:
- Journal Name: Journal of Chemical Physics Journal Volume: 158 Journal Issue: 14; Journal ID: ISSN 0021-9606
- Publisher:
- American Institute of Physics
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Kipkorir, Anthony, Jin, Xiuyu, Gao, Haifeng, and Kamat, Prashant V. Photoinduced electron transfer across the polymer-capped CsPbBr 3 interface in a polar medium. United States: N. p., 2023.
Web. doi:10.1063/5.0143920.
Kipkorir, Anthony, Jin, Xiuyu, Gao, Haifeng, & Kamat, Prashant V. Photoinduced electron transfer across the polymer-capped CsPbBr 3 interface in a polar medium. United States. https://doi.org/10.1063/5.0143920
Kipkorir, Anthony, Jin, Xiuyu, Gao, Haifeng, and Kamat, Prashant V. Fri .
"Photoinduced electron transfer across the polymer-capped CsPbBr 3 interface in a polar medium". United States. https://doi.org/10.1063/5.0143920.
@article{osti_1969144,
title = {Photoinduced electron transfer across the polymer-capped CsPbBr 3 interface in a polar medium},
author = {Kipkorir, Anthony and Jin, Xiuyu and Gao, Haifeng and Kamat, Prashant V.},
abstractNote = {In-situ polymer capping of cesium lead bromide (CsPbBr 3 ) nanocrystals with polymethyl acrylate is an effective approach to improve the colloidal stability in the polar medium and thus extends their use in photocatalysis. The photoinduced electron transfer properties of polymethyl acrylate (PMA)-capped CsPbBr 3 nanocrystals have been probed using surface-bound viologen molecules with different alkyl chains as electron acceptors. The apparent association constant ( K app ) obtained for the binding of viologen molecules with PMA-capped CsPbBr 3 was 2.3 × 10 7 M −1 , which is an order of magnitude greater than that obtained with oleic acid/oleylamine-capped CsPbBr 3 . Although the length of the alkyl chain of the viologen molecule did not show any impact on the electron transfer rate constant, it influenced the charge separation efficiency and net electron transfer quantum yield. Viologen moieties with a shorter alkyl chain length exhibited a charge separation efficiency of 72% compared with 50% for the longer chain alkyl chain length viologens. Implications of polymer-capped CsPbBr 3 perovskite nanocrystals for carrying out photocatalytic reduction in the polar medium are discussed.},
doi = {10.1063/5.0143920},
journal = {Journal of Chemical Physics},
number = 14,
volume = 158,
place = {United States},
year = {Fri Apr 14 00:00:00 EDT 2023},
month = {Fri Apr 14 00:00:00 EDT 2023}
}
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