Interfacial electron transfer of perylenes: Influence of the anchor binding mode
Date
2024-01-21
Journal Title
Journal ISSN
Volume Title
Publisher
The Journal of Chemical Physics
Abstract
Interfacial electron transfer (IET) through saturated single-linker and dual-linker groups from a perylene chromophore into nanostructured TiO2 films was studied by ultrafast spectroscopy. Perylene chromophores with one and two propanoic acid linker groups in the peri and ortho positions were investigated. In comparison to previously studied perylenes bound via unsaturated acrylic acid linkers, the chromophores with saturated linkers showed bi-exponential IET dynamics. Two distinct transfer times were observed that indicate the presence of two concurrent binding modes. A comparison between ortho- and peri-substituted sensitizers resulted in slower IET dynamics and weaker electronic coupling for ortho substitution. Finally, IET from sensitizers with saturated linker groups is neither promoted nor hindered by a second linker group. This indicates that only one of the two linkers binds covalently to the surface. This study reveals the importance of the anchor-binding mode and design considerations of the linker for regulating IET.
Description
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Han Yan, Ryan Harmer, Binish Zafar, Elena Galoppini, Lars Gundlach; Interfacial electron transfer of perylenes: Influence of the anchor binding mode. J. Chem. Phys. 21 January 2024; 160 (3): 034706. https://doi.org/10.1063/5.0185342 and may be found at https://doi.org/10.1063/5.0185342. © 2024 Author(s). Published under an exclusive license by AIP Publishing. This article will be embargoed until 01/21/2025.
Keywords
Citation
Han Yan, Ryan Harmer, Binish Zafar, Elena Galoppini, Lars Gundlach; Interfacial electron transfer of perylenes: Influence of the anchor binding mode. J. Chem. Phys. 21 January 2024; 160 (3): 034706. https://doi.org/10.1063/5.0185342