Self‐Assembly of Dendritic Macromolecules Based on the Ionic Interaction of Linear Chain Polyelectrolyte Cores with Oppositely Charged Focal Ionogenic Groups of Dendrons

Abstract

Summary: A new principle for the design of dendritic macromolecules – the ionic binding of linear chain polyelectrolyte with oppositely charged focal ionogenic groups of dendrons – has been developed. The majority of the dendritic ionic complexes (DICs) are prepared with poly(styrenesulfonic acid) (PSS) as a polymeric core and L‐aspartic acid dendrons of different generations. Two series of DICs were prepared using PSS and aspartic dendrons bearing terminal (located at the external periphery) methoxycarbonyl and hexyloxycarbonyl groups (C1‐n and C6‐n respectively where n is the generation number). Ionic binding of about 100% was found for dendrons of Generation 1–3. The solubility of the DICs was examined and the DICs prepared were studied by IR spectroscopy, 1H NMR and viscometry.

Dendronized supramolecular polymers

“…12a). 109 Ionic interactions between conjugated poly(phenylacetylene)s and chiral glutamic acid dendrons formed supramolecular polymer 48 in organic solution, and at the same time mediated the DSP to adopt a helical conformation with preferential handedness (Fig. 12b).…”

Self-Organizable Vesicular Columns Assembled from Polymers Dendronized with Semifluorinated Janus Dendrimers Act As Reverse Thermal Actuators

“…Traditional dendronized polymers are synthetic or natural linear backbones containing a dendritic group, which is most frequently a dendron, attached to each of their repeat units . They are synthesized via covalent divergent, convergent followed by covalent or supramolecular attachment to the backbone as well as by dendritic macromonomer, strategies. Recently, cyclic dendronized polymers , have been reported, and it is expected that even more complex topologies will emerge.…”

Noncovalently Functionalized Poly(norbornene)s Possessing both Hydrogen Bonding and Coulombic Interactions

“…Also, no significant shifts in the 13 C spectra were observed upon Coulombic self-assembly, regardless of the fact that the carbon data would also be qualitative and not quantitative. Hence, the Coulombic self-assembly between 3 with 5 , 6 , and 7 was studied by using infrared spectroscopy by monitoring the distinct absorption bands around 3000 and 1500 cm -1 (−N + (CH 3 ) 3 group), 1245 cm -1 (sulfonate group), around 1560 cm -1 (carboxylate group), and around 1235 cm -1 (phenate group). ,, The IR spectra can be found in the Supporting Information.…”

“…Hence, the Coulombic self-assembly between 3 with 5, 6, and 7 was studied by using infrared spectroscopy by monitoring the distinct absorption bands around 3000 and 1500 cm -1 (-N + (CH 3 ) 3 group), 1245 cm -1 (sulfonate group), around 1560 cm -1 (carboxylate group), and around 1235 cm -1 (phenate group). 24,63,64 The IR spectra can be found in the Supporting Information.…”

“…Ionomers are widely used commercially due to their unique physical properties such as enhanced impact strength, toughness, and thermal reversibility . Other examples of Coulombic interactions in polymeric systems include block copolymers containing charged segments, − ionically cross-linked polymers, self-assembled dendrimers, , functionalized telechelics, main-chain ionically functionalized polymers, ionically linked main- and side-chain liquid crystalline polymers, , artificial molecular machines, ionic polyamphiphiles, and ionically self-assembled fluorescent materials . While these examples clearly demonstrate the importance of Coulombic interactions in materials science, they have only used these interactions in the absence of other noncovalent interactions.…”