Structural and Rheological Study of a Bis-urea Based Reversible Polymer in an Apolar Solvent

Lortie, Frédéric; Boileau, Sylvie; Bouteiller, Laurent; Chassenieux, Christophe; Demé, Bruno; Ducouret, Guylaine; Jalabert, Matthieu; Lauprêtre, F.; Térech, Pierre

doi:10.1021/la0255166

Cited by 140 publications

(184 citation statements)

References 19 publications

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“…6). [150][151][152] Note, that by protecting this hydrogen bonding synthon on each side in a hydrophobic pocket based on a C 11 aliphatic chain flanked with oligoethylene glycol chains, stable supramolecular polymers can also be obtained in water. 153 An alkylated derivative 2,4-bis(dibutylureido)-toluene (DBUT), is only able to form two hydrogen bonds per monomer and can be used as a chain stopper.…”

mentioning

confidence: 99%

Controlling supramolecular polymerization through multicomponent self‐assembly

Besenius

2016

J. Polym. Sci. Part A: Polym. Chem.

126

102

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The self-assembly into supramolecular polymers is a process driven by reversible non-covalent interactions between monomers, and gives access to materials applications incorporating mechanical, biological, optical or electronic functionalities. Compared to the achievements in precision polymer synthesis via living and controlled covalent polymerization processes, supramolecular chemists have only just learned how to developed strategies that allow similar control over polymer length, (co)monomer sequence and morphology (random, alternating or blocked ordering). This highlight article discusses the unique opportunities that arise when coassembling multicomponent supramolecular polymers, and focusses on four strategies in order to control the polymer architecture, size, stability and its stimuli-responsive properties: (1) endcapping of supramolecular polymers, (2) biomimetic templated polymerization, (3) controlled selectivity and reactivity in supramolecular copolymerization, and (4) living supramolecular polymerization. In contrast to the traditional focus on equilibrium systems, our emphasis is also on the manipulation of selfassembly kinetics of synthetic supramolecular systems. V C 2016

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mentioning

confidence: 99%

Controlling supramolecular polymerization through multicomponent self‐assembly

Besenius

2016

J. Polym. Sci. Part A: Polym. Chem.

126

102

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“…1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 At the concentration of the experiment (6 g/L), the interactions between objects can be neglected. 29 Therefore, the fit of the data was attempted with various form factors of rigid cylinders. The simplest one that can describe the whole data set is the form factor for a rigid cylinder with an elliptical cross-section and a uniform contrast.…”

Section: Page 11 Of 25 Langmuirmentioning

confidence: 99%

Two-Component Self-Assemblies: Investigation of a Synergy between Bisurea Stickers

et al. 2016

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ABSTRACT. It is of interest to develop two-component systems for added flexibility in the design of supramolecular polymers, nanofibers or organogels. Bis-ureas are known to selfassemble by hydrogen bonding into long supramolecular objects. We show here that mixing aromatic bis-ureas with slightly different structures can yield surprisingly large synergistic effects. A strong increase in viscosity is observed when a bis-urea with the sterically demanding 2,4,6-trimethylbenzene spacer is combined with a bis-urea bearing no methyl group in position 2 of the aromatic spacer (i.e. 4-methylbenzene or 4,6-dimethylbenzene). This effect is the consequence of a change in supramolecular assembly triggered by the composition of the mixture. The mixture of complementary bis-ureas forms rod-like objects that are more stable by about 1 kJ/mol, and that are thicker than the rod-like objects formed by both parent systems.

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“…Furthermore, rheological measurements on samples of 2 at a concentration of 20 mg/ml demonstrated that the samples were true gels since the storage modulus (G') was greater than the loss modulus (G''), and both are independent of frequency in the linear viscoelastic regime tested. 22 The storage modulus of the gels (ca. 120 Pa) was of a similar magnitude to that of other metallosupramolecular polymer organogels reported in the literature (Fig.…”

Section: Supramolecular Self-assembly Of Ligand 1 and Of Its [2x2] Grmentioning

confidence: 99%

Generation of metallosupramolecular polymer gels from multiply functionalized grid-type complexes

et al. 2012

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Structural and Rheological Study of a Bis-urea Based Reversible Polymer in an Apolar Solvent

Cited by 140 publications

References 19 publications

Controlling supramolecular polymerization through multicomponent self‐assembly

Controlling supramolecular polymerization through multicomponent self‐assembly

Two-Component Self-Assemblies: Investigation of a Synergy between Bisurea Stickers

Generation of metallosupramolecular polymer gels from multiply functionalized grid-type complexes

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