Ribbonlike Assembly of Molecules Composed of Fulleropyrrolidine and PUA Dendron

Abstract

The hybrid molecules composed of fulleropyrrolidine and poly(urethane amide) dendron of the third generation have been synthesized, and their self-assembling in THF/water mixtures has been studied. By TEM, AFM, and SAXS methods it was established that molecules form ribbonlike aggregates with the ordered layers of fullerene derivatives situated inside of the ribbons. Microscale length and high ratio width/thickness were detected for the ribbons. The ability of amides and urethanes to initiate a coupling of dendron-fragments by means of hydrogen bonding has been considered as mainly responsible for anisotropic interaction of hybrid molecules and for the ribbonlike aggregates formation in THF/water mixtures.

Charge-Regulated Spontaneous, Reversible Self-Assembly of the Carboxylic Acid-Functionalized Hydrophilic Fullerene Macroanions in Dilute Solution

“…Assembling fullerenes, in particular, their derivatives, into hierarchical ordered structures across multilength scales represents one of the most popular protocols in processing fullerene into functional materials and devices. − Noncovalent interactions, including hydrogen bonding, − hydrophobic interactions, , and aromatic stacking, ,, are the most common driving forces for the assembly of fullerene derivatives. Therefore, a thorough understanding of the roles of noncovalent interactions playing in their self-assembly behavior is quite critical in designing the fullerene derivatives and programming them into required morphologies and functions, as proved by the continuous efforts from different groups on investigating the self-assembly of fullerene derivatives driven by single or multiple types of noncovalent interactions. − In particular, as a class of most intensively studied fullerene derivatives, the amphiphilic fullerenes provide a versatile platform for engineering controllable assemblies of fullerene derivatives in solution and in the bulk. ,,− Rich phase behaviors and abundant hierarchically ordered structures have been shown from the self-assembly of various amphiphilic fullerenes involving driving forces such as hydrogen bonding, hydrophobic interaction, and aromatic stacking. ,− …”

Nanocomposites based on polyurethanes and carbon nanoparticles: preparation, properties and application

“…An interesting example of the use of fullerene in the design of an unusual polymeric material is described. 34 Using TEM, SEM and SAXS, the authors showed that the particles of polyurethane amide dendrimer of the 3 rd generation attached to the fulleropyridine molecule form aggregates in the THF-water mixture. The aggregates appear as ribbons with ordered layers of the C 60 derivative located between ribbons.…”