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Schematic representations of Gemini-shaped HBC derivatives and their nanotubes. (A) Molecular structures of HBC–C60 dyad 1 and HBC 2. (B) Schematic representation of the formation of homotropic and coassembled nanotubes of 1 and 2. (C) Schematic representation of the wall structure of the nanotube of 1, where an electron-transporting molecular layer of clustering C60 (orange) laminates a hole-transporting, graphite-like layer of π-stacked HBC units (blue).
