Organisation of clay nanoplatelets in a polyelectrolyte-based hydrogel

An enzyme-assembled gel monolithic microreactor for continuous flow asymmetric synthesis of aryl alcohols

“…S4a †), which is characteristic of the heterogeneities introduced by the non-oriented assembly. 46 These amorphous features were also confirmed by PXRD (Fig. S2 †).…”

Tuning Structure and Rheological Properties of Polyelectrolyte-Based Hydrogels through Counterion-Specific Effects

“…Gelation mechanisms of modified ionene hydrogels are multiple and complex processes that have been partially described in the literature by Misawa et al, 10 Yoshida et al, 28 and Bachl et al 11 and recently by our team in a previous article. 13 The main mechanisms proposed are hydrogen bond interactions between amide groups, π−π stacking interactions, and (N + )−π cation interactions as well as electrostatic interactions. It has been assumed that hydrogen bonds between the amide functions are formed indirectly from interactions with chloride counterions and water molecules (Figure 1).…”

“…37−39 The structure of the 6-Cl modified ionene solution and gel is different from the one of conventional ionene solutions as already described in our previous study. 13 Figure 3A displays the scattering intensity of a 6-Cl solution at 70 °C and gel at room temperature after the heating−cooling process at 0.051 M. In the middle-q region, the scattering intensity evolves as I ∼ q −2 , a typical feature for polymer systems, be it for solutions or gels. 40 At low q region, an upturn in the scattering intensity is observed, which is associated with large-scale heterogeneities, very often seen for polyelectrolytes and gels.…”

“…■ EXPERIMENTAL SECTION 6-Cl Modified Ionene (6-Cl) and Precursor Synthesis. The 6-Cl and its precursors were synthesized by a two-step reaction with a protocol adjusted from the one described previously, 10 as detailed in ref 13. The chemical reagents were all purchased from Sigma-Aldrich and used without additional purification.…”

“…Moreover, it has been shown in the literature that these modified ionenes exhibit antimicrobial properties, which made these systems suitable for biomedical applications. Hydrogels based on modified ionenes are formed through a combination of electrostatic repulsions, hydrogen bonding, π–π stacking, and anion−π and cation−π interactions , (see Figure C).…”