NDLI: Lateral Electron and Hole Hopping between Dyes on Mesoporous ZrO<sub>2</sub>: Unexpected Influence of Solvents with a Low Dielectric Constant.

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Lateral Electron and Hole Hopping between Dyes on Mesoporous ZrO₂: Unexpected Influence of Solvents with a Low Dielectric Constant.

Content Provider	Europe PMC
Author	Wrede, Sina Cai, Bin Kumar, Amol Ott, Sascha Tian, Haining
Copyright Year	2023
Abstract	Lateral intermolecularcharge transfer between photosensitizerson metal oxide substrates is important for the understanding on theoverall working principles of dye-sensitized systems. Such studiesusually concentrate on either hole or electron transfer separatelyand are conducted in solvents with a high dielectric constant (εs) that are known, however, to show a drasticdecrease of the local dielectric constant close to the metal oxidesurface. In the present study, both hole and electron hopping betweenorganic donor–acceptor photosensitizers was experimentallyinvestigated on PB6 dye-sensitized mesoporous ZrO2 films.The donor (close to the surface) and acceptor (away from surface)subunit of the PB6 dye were observed to be involved in hole and electronhopping, respectively. Hole and electron transfer kinetics were foundto differ remarkably in high-εs solvents,but similar in solvents with εs <12. This finding indicates that low-εs solvents maintain similar local dielectric constant valuesclose to, and further away from, the semiconductor surface, whichis different from the previously observed behavior of high dielectricconstant solvents at a metal oxide interface.
ISSN	00027863
Volume Number	145
PubMed Central reference number	PMC10236494
Issue Number	21
PubMed reference number	37127024
Journal	Journal of the American Chemical Society [J. Am. Chem. Soc]
e-ISSN	15205126
DOI	10.1021/jacs.3c01333
Language	English
Publisher	American Chemical Society
Publisher Date	2023-05-01
Access Restriction	Open
Rights License	Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). © 2023 The Authors. Published by American Chemical Society
Content Type	Text
Resource Type	Article
Subject	Chemistry Colloid and Surface Chemistry Biochemistry Catalysis

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Lateral Electron and Hole Hopping between Dyes on Mesoporous ZrO2: Unexpected Influence of Solvents with a Low Dielectric Constant.

Lateral Electron and Hole Hopping between Dyes on Mesoporous ZrO₂: Unexpected Influence of Solvents with a Low Dielectric Constant.