What is it about?

This work reports the confirmation of the experimental assignment of single-walled carbon nanotubes (SWNT) absolute-handedness chirality. This is fulfilled using the supramolecular structures of metalized porphyrin derivative (i.e. nickel-5,15-bisdodecylporphyrin, Ni-BDP) on chiral-concentrated single-walled carbon nanotubes (with right-handed helix P- and left-handed helix M-) surfaces utilized by scanning tunneling microscopy (STM) imaging technique. Based on the handedness chirality, two different chiral supramolecular structures of Ni-BDP were interestingly observed on SWNT enantiomers surface. The metal center incorporation to the porphyrin ring does not play significant role and/or variance in the SWNT absolute-handedness chirality assignment, however the large-pi-system porphyrin ring is more crucial. These findings will effectively pave the way towards clear selective synthesis, separation, chemistry and applications of SWNT enantiomers.

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Why is it important?

This study aims to emphasize the experimental assignment of the SWNT absolute-handedness chirality using supramolecular structures of metalloporphyrin derivative i.e. nickel-5,15-bisdodecylporphyrin (Figure 1) (Ni-BDP) on chiral-SWNTs surface via STM characterization, for the purpose to confirm firstly the experimental identification of SWNT absolute-handedness chirality, then identify its effect on organic molecules alignment (i.e. supramolecular structures) on the tube surface. Additionally, consider the porphyrin metalation effect on the SWNT absolute-handedness chirality.


Writing this article was a great pleasure as it has co-authors with whom I have had long standing collaborations.

Dr. Ahmed I. A. Abd El-Mageed
Minia University

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This page is a summary of: Single‐walled carbon nanotube absolute‐handedness chirality assignment confirmation using metalized porphyrin's supramolecular structures via STM imaging technique, Chirality, January 2020, Wiley, DOI: 10.1002/chir.23163.
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