Switching of Redox Properties Triggered by a Thermal Equilibrium between Closed-Shell Folded and Open-Shell Twisted Species |
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Authors: | Dr. Yusuke Ishigaki Takumi Hashimoto Kazuma Sugawara Prof. Dr. Shuichi Suzuki Prof. Dr. Takanori Suzuki |
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Affiliation: | 1. Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810 Japan;2. Graduate School of Engineering Science, Osaka University, Osaka, 560-8531 Japan |
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Abstract: | Thermally switchable redox properties have been reported to be due to a change in the spin state of newly designed overcrowded ethylenes, which can adopt closed-shell folded and open-shell twisted forms. In this study, tetrathienylanthraquinodimethane derivatives were designed to be in thermal equilibrium between a more stable folded form and less stable but more donating twisted diradical in solution, so that the oxidation potential can be controlled by heating/cooling. This is the first example of a switching of redox properties based on a thermally equilibrated twisted diradical, which can be more readily oxidized to the twisted dication. |
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Keywords: | Kationen Radikale Redoxchemie Thermisches Gleichgewicht Überladenes Ethylen |
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