A strained π-extended [10]cycloparaphenylene carbon nanoring

Abstract

Herein, we report the facile synthesis of a highly strained hexabenzocoronene-containing carbon nanoring, cyclo[4]-paraphenylene[2]-2,11-hexabenzocoronenylene ([4,2]CPHBC), as the segment of a [10,10] single-walled carbon nanotube ([10,10]SWNT). [4,2]CPHBC was synthesized based on the platinum-mediated assembly of diborylbiphenyl and diborylhexabenzocoronene, forming a tetranuclear platinum complex, followed by reductive elimination. This nanoring molecule was confirmed by NMR and HR-MS, and its photophysical properties were studied using steady-state and time-resolved spectroscopies. Moreover, the selective supramolecular host-guest interaction between [4,2]CPHBC and C60 was also investigated.