Supramolecular modification of single-walled carbon nanotubes with a water-soluble triptycene derivative

π‐Concave Hosts for Curved Carbon Nanomaterials

“…They soon after improved upon their originaldesign by replacing the ada- www.chemeurj.org mantyl group and simply using at etra(ethylene glycol) linker, allowing for the triptycenes to solvate in water withoutt he necessity for cyclodextrin. [72] They noticed that on top of seeing increased solubility in the SWNTs, they also noted ad iameter selectivity for tubes with as mall diameter of 1.0 nm, which was due to the shape interaction of the triptycenes with the SWNTs. Furtheri mprovements upon this design were made by Hammershøj et al [73] Through am ore involved syntheticr oute, they were able to install sodium sulfonates on their triptycene derivatives, furtheri mproving solubility.O nt op of SWNT solubility,t hey showed that the same surfactant could be used to solvate fullerene C 60 to ah igh degree.…”

“…These triptycene molecules are capable of binding to the SWNTs in water and form inclusion complexes with cyclodextrin, allowing for solubilization of SWNTs in a water/cyclodextrin solution (Figure ). They soon after improved upon their original design by replacing the adamantyl group and simply using a tetra(ethylene glycol) linker, allowing for the triptycenes to solvate in water without the necessity for cyclodextrin . They noticed that on top of seeing increased solubility in the SWNTs, they also noted a diameter selectivity for tubes with a small diameter of 1.0 nm, which was due to the shape interaction of the triptycenes with the SWNTs.…”

Tuning the low critical solution temperature of polymer brushes grafted on single-walled carbon nanotubes and temperature dependent loading and release properties

“…It is reported that the molecular weight and grafting density of polymers play a vital role in this field . Although the covalent method is widely used to prepare well‐dispersed SWCNTs and the thicknesses of the polymer brushes grafted on SWCNTs could be evaluated by transmission electron microscopy (TEM) or atomic force microscopy (AFM), the molecular weights are still not measured accurately and the covalent method converts anchoring carbon atoms from sp 2 to sp 3 hybridized orbitals, which greatly damages the conjugated π‐system of the tubes and has a dramatic effect on their electronic and optical properties . Compared to covalent method, noncovalent functionalization is a better way to preserve the intrinsic physical properties of SWCNTs.…”

“…[16][17][18][19] Although the covalent method is widely used to prepare well-dispersed SWCNTs and the thicknesses of the polymer brushes grafted on SWCNTs could be evaluated by transmission electron microscopy (TEM) or atomic force microscopy (AFM), [20][21][22] the molecular weights are still not measured accurately and the covalent method converts anchoring carbon atoms from sp 2 to sp 3 hybridized orbitals, which greatly damages the conjugated p-system of the tubes and has a dramatic effect on their electronic and optical properties. [23][24][25] Compared to covalent method, noncovalent functionalization is a better way to preserve the intrinsic physical properties of SWCNTs. However, the polymer chains always suffer from fragmentation by ultrasonication during the dispersion of SWCNTs, which causes the molecular weight of the polymer modified on the SWCNTs to be uncertain and different from the pristine molecular weight.…”