Diporphyrin and Dipyrene Nanocalipers for Discrimination of Diameter and Metallicity in Single-Walled Carbon Nanotubes

We have been developing host-guest methodology for separation of single-walled carbon nanotubes (SWNTs) according to the handedness and diameter with gable-type chiral diporphyrins, designated as diporphyrin nanotweezers, consisting of two porphyrins and rigid spacer in between [1-4]. In this paper, we will talk about next generation of the host molecules focusing on larger diameter of SWNTs, named “nanocalipers” (Figure 1) [5,6].

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