Details

Autor(en) / Beteiligte

• Barnes, Jonathan C.
• Fahrenbach, Albert C.
• Cao, Dennis
• Dyar, Scott M.
• Frasconi, Marco
• Giesener, Marc A.
• Benítez, Diego
• Tkatchouk, Ekaterina
• Chernyashevskyy, Oleksandr
• Shin, Weon Ho
• Li, Hao
• Sampath, Srinivasan
• Stern, Charlotte L.
• Sarjeant, Amy A.
• Hartlieb, Karel J.
• Liu, Zhichang
• Carmieli, Raanan
• Botros, Youssry Y.
• Choi, Jang Wook
• Slawin, Alexandra M. Z.
• Ketterson, John B.
• Wasielewski, Michael R.
• Goddard, William A.
• Stoddart, J. Fraser

Titel

A Radically Configurable Six-State Compound

Ist Teil von

• Science (American Association for the Advancement of Science), 2013-01, Vol.339 (6118), p.429-433

Ort / Verlag

Washington, DC: American Association for the Advancement of Science

Erscheinungsjahr

2013

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• Most organic radicals possess short lifetimes and quickly undergo dimerization or oxidation. Here, we report on the synthesis by radical templation of a class of air- and water-stable organic radicals, trapped within a homo[2]catenane composed of two rigid and fixed cyclobis (paraquat-p-phenylene) rings. The highly energetic octacationic homo[2]catenane, which is capable of accepting up to eight electrons, can be configured reversibly, both chemically and electrochemically, between each one of six experimentally accessible redox states (0, 2+, 4+, 6+, 7+, and 8+) from within the total of nine states evaluated by quantum mechanical methods. All six of the observable redox states have been identified by electrochemical techniques, three (4+, 6+, and 7+) have been characterized by x-ray crystallography, four (4+, 6+, 7+, and 8+) by electron paramagnetic resonance spectroscopy, one (7+) by superconducting quantum interference device magnetometry, and one (8+) by nuclear magnetic resonance spectroscopy.