Synthesis, Characterization, and Self-Assembling Properties of New Amphiphilic Dendrons Bearing Branched TRIS-Derived Oligomers as Polar Head Groups
Résumé
The synthesis and characterization of a new family
of dendritic surfactants called DendriTAC are described. Two
series of single- or double-tailed surfactants containing hydrophobic
hydrocarbon or fluorocarbon chains grafted onto Tris-
(hydroxymethyl)aminomethane (or TRIS)-derived oligomeric
polar heads via a copper(I)-mediated click reaction have been
prepared. A total of 13 new dendritic surfactants have been
obtained by grafting linear polyTRIS branches of variable average
degree of polymerization (DPn) onto a single or double-tailed
fluorinated or hydrocarbon chain of variable length, via a dendritic
central scaffold of generation G1 or G2. Structural parameters of the
surfactant assemblies in solution [radii of gyration (RG), volumeweighted
hydrodynamic radii (RH), and aggregation numbers
(Nag)] were assessed by small-angle X-ray scattering and dynamic light scattering. Overall, regardless of their tree-like structure (i.e.,
generation type), length of the headgroup (DPn), and nature (hydrocarbonated or fluorinated, single or double-tail) or length of the
hydrophobic chains, self-assembling properties of H/F-DendriTACs are in agreement with usual trends of surfactant assemblies, e.g.,
as a function of chain length or polar head volume. Thus, thanks to their great structural versatility, H/F-DendriTACs can provide
highly tunable self-assembly morphologies that can be adapted to specific applications.
Domaines
ChimieOrigine | Fichiers produits par l'(les) auteur(s) |
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