Pentacene Appended to a TEMPO Stable Free Radical: The Effect of Magnetic Exchange Coupling on Photoexcited Pentacene
Chernick E, Casillas R, Zirzlmeier J, Gardner DM, Gruber M, Kropp H, Meyer K, Wasielewski MR, Guldi DM, Tykwinski R (2015)
Publication Type: Journal article
Publication year: 2015
Journal
Book Volume: 137
Pages Range: 857-863
Journal Issue: 2
DOI: 10.1021/ja510958k
Abstract
Understanding the fundamental spin dynamics of photoexcited pentacene derivatives is important in order to maximize their potential for optoelectronic applications. Herein, we report on the synthesis of two pentacene derivatives that are functionalized with the [(2,2,6,6-tetramethylpiperidin-1-yl)oxy] (TEMPO) stable free radical. The presence of TEMPO does not quench the pentacene singlet excited state, but does quench the photoexcited triplet excited state as a function of TEMPO-to-pentacene distance. Time-resolved electron paramagnetic resonance experiments confirm that triplet quenching is accompanied by electron spin polarization transfer from the pentacene excited state to the TEMPO doublet state in the weak coupling regime.
Authors with CRIS profile
Erin Chernick
Sonderforschungsbereich 953/3 Synthetische Kohlenstoffallotrope
Ruben Casillas Pacheco
Lehrstuhl für Physikalische Chemie I
Johannes Zirzlmeier
Lehrstuhl für Physikalische Chemie I
Marco Gruber
Lehrstuhl für Organische Chemie I
Henning Kropp
Lehrstuhl für Anorganische und Allgemeine Chemie
Karsten Meyer
Lehrstuhl für Anorganische und Allgemeine Chemie
Dirk Michael Guldi
Lehrstuhl für Physikalische Chemie I
Rik Tykwinski
Lehrstuhl für Organische Chemie I
Additional Organisation(s)
Involved external institutions
United States (USA) (US)How to cite
APA:
Chernick, E., Casillas, R., Zirzlmeier, J., Gardner, D.M., Gruber, M., Kropp, H.,... Tykwinski, R. (2015). Pentacene Appended to a TEMPO Stable Free Radical: The Effect of Magnetic Exchange Coupling on Photoexcited Pentacene. Journal of the American Chemical Society, 137(2), 857-863. https://dx.doi.org/10.1021/ja510958k
MLA:
Chernick, Erin, et al. "Pentacene Appended to a TEMPO Stable Free Radical: The Effect of Magnetic Exchange Coupling on Photoexcited Pentacene." Journal of the American Chemical Society 137.2 (2015): 857-863.
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