Two-Photon Absorption in Pentacene Dimers: The Importance of the Spacer Using Upconversion as an Indirect Route to Singlet Fission

Garoni E, Zirzlmeier J, Basel B, Hetzer C, Kamada K, Guldi DM, Tykwinski R (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Book Volume: 139

Pages Range: 14017-14020

Journal Issue: 40

DOI: 10.1021/jacs.7b08287

Abstract

In this proof of concept study, we show that intramolecular singlet fission (iSF) can be initiated from a singlet excited state accessed by two-photon absorption, rather than through a traditional route of direct one-photon excitation (OPE). Thus, iSF in pentacene dimers 2 and 3 is enabled through NIR irradiation at 775 nm, a wavelength where neither dimer exhibits linear absorption of light. The adamantyl and meta-phenylene spacers 2 and 3, respectively, are designed to feature superimposable geometries, which establishes that the electronic coupling between the two pentacenes is the significant structural feature that dictates iSF efficiency.

Authors with CRIS profile

Involved external institutions

Università degli studi di Milano Italy (IT) National Institute of Advanced Industrial Science and Technology / 産業技術総合研究所 (AIST) Japan (JP)

How to cite

APA:

Garoni, E., Zirzlmeier, J., Basel, B., Hetzer, C., Kamada, K., Guldi, D.M., & Tykwinski, R. (2017). Two-Photon Absorption in Pentacene Dimers: The Importance of the Spacer Using Upconversion as an Indirect Route to Singlet Fission. Journal of the American Chemical Society, 139(40), 14017-14020. https://doi.org/10.1021/jacs.7b08287

MLA:

Garoni, Eleonora, et al. "Two-Photon Absorption in Pentacene Dimers: The Importance of the Spacer Using Upconversion as an Indirect Route to Singlet Fission." Journal of the American Chemical Society 139.40 (2017): 14017-14020.

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