Isolation and characterization of the cycloparaphenylene radical cation and dication

Eiichi Kayahara; Takahiko Kouyama; Tatsuhisa Kato; Hikaru Takaya; Nobuhiro Yasuda; Shigeru Yamago

doi:10.1002/anie.201306881

Isolation and characterization of the cycloparaphenylene radical cation and dication

Angew Chem Int Ed Engl. 2013 Dec 16;52(51):13722-6. doi: 10.1002/anie.201306881. Epub 2013 Nov 19.

Authors

Eiichi Kayahara¹, Takahiko Kouyama, Tatsuhisa Kato, Hikaru Takaya, Nobuhiro Yasuda, Shigeru Yamago

Affiliation

¹ Institute for Chemical Research, Kyoto University, Uji 611-0011 (Japan) http://www.scl.kyoto-u.ac.jp/∼kayahara/; Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Tokyo 102-0076 (Japan).

PMID: 24254298
DOI: 10.1002/anie.201306881

Abstract

Charged nanobelts: The radical cation and the dication of [8]cycloparaphenylene ([8]CPP) were prepared and isolated as hexahaloantimonate salts by the one- or two-electron chemical oxidation of [8]CPP with NOSbF6 or SbCl5 . ESR spectroscopy of CPP(.+) and single-crystal X-ray analysis of CPP(2+) demonstrated that the spin and charge were equally and fully delocalized over the para-phenylene rings.

Keywords: X-ray diffraction; nanobelts; oxidation; quinodimethanes; radical ions.