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The Smallest "Carbon Nanoring" [5]Cycloparaphenylene ([5]CPP)

Structural Feature

• CPP having the smallest ring size among synthesized other examples
• Cyclic unit structure of fullerene (C60) and [5,5] carbon nanotube
• The same diameter as C60 (0.7 nm)


• Soluble in organic solvents
• Narrow HOMO-LUMO gap comparable with that of C60

Possible Application

• Organic electronics materials
• Raw material for carbon nanoring derivatives, and bottom up synthesis of CNT
• Molecular host materials


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This material was produced by collaboration with Prof. Yamago at Institute for Chemical Research, Kyoto University.

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