A triptycene-based approach to solubilising carbon nanotubes and C60

Area of Science:

• Supramolecular Chemistry
• Materials Science
• Nanotechnology

Background:

• Solubilizing carbon nanomaterials like single-walled carbon nanotubes (SWNTs) and C(60) in aqueous solutions is crucial for their practical applications.
• Existing methods often require harsh conditions or specialized equipment, limiting widespread use.

Purpose of the Study:

• To synthesize novel triptycene-based and naphthalene-based surfactants capable of solubilizing SWNTs and C(60) in water.
• To investigate the role of surfactant tail design (ionic vs. non-ionic) in promoting supramolecular interactions and enhancing solubilization efficacy.
• To assess the stability and properties of the resulting surfactant/nanomaterial dispersions.

Main Methods:

• Synthesis of triptycene and naphthalene-based amphiphilic surfactants.
• Characterization of surfactant properties and their interaction with SWNTs and C(60).
• Evaluation of dispersion stability using UV/Vis/NIR absorption spectroscopy, Transmission Electron Microscopy (TEM), and Atomic Force Microscopy (AFM).

Main Results:

• Successful synthesis of triptycene and naphthalene surfactants with ionic or non-ionic tails.
• Demonstrated ability of these surfactants to non-covalently solubilize SWNTs and C(60) in water.
• Formation of stable aqueous dispersions with SWNTs, with surfactant/SWNT complexes remaining stable for over a year.

Conclusions:

• The designed triptycene and naphthalene surfactants provide an effective means for aqueous solubilization of SWNTs and C(60).
• The amphiphilic nature and tail design of the surfactants are key to achieving strong supramolecular interactions and stable dispersions.
• These findings open avenues for the facile integration and application of carbon nanomaterials in aqueous environments.