Schiff base fluorescent hydrogel containing acylhydrazone structure and pyridine ring with multifunction

Abstract

In order to prepare multifunctional fluorescent hydrogel (FH), functional Schiff base ligands have been incorporated into polymer networks. We reported here a novel multifunctional Schiff base functionalized FH, P(AM-PEGA-PEPMA), and its corresponding metallohydrogel, Zn 2+ -P(AM-PEGA-PEPMA), which exhibited tunable fluorescence intensity, self-healing ability, stretchability, and shape-memory property. P(AM-PEGA-PEPMA) was obtained by one-pot micellar copolymerization and Zn 2+ -P(AM-PEGA-PEPMA) was formed by metal coordination between Schiff base

Preparation and properties of Schiff base fluorescent hydrogels with high strength and toughness based on multiple hydrogen bonding and hydrophobic association

“…The indole‐containing Schiff base has been extensively studied for its fluorescence and antibacterial properties, 33,34 and the indole‐containing ring contains “NH” bond, which facilitates its synergistic effect in multiple hydrogen bonds and hydrophobic association mechanism to a certain extent. Our group reported that Schiff base hydrogels containing pyridyl hydrazone structure had excellent mechanical properties, pH response and fluorescence regulation 35,36 . Our group also reported the ultra‐stretchable and self‐healing hydrogels, which had excellent fatigue resistance, viscosity and electrical conductivity, and they could be used in flexible strain sensors 37 .…”

“…Our group reported that Schiff base hydrogels containing pyridyl hydrazone structure had excellent mechanical properties, pH response and fluorescence regulation. 35,36 Our group also reported the ultra-stretchable and self-healing hydrogels, which had excellent fatigue resistance, viscosity and electrical conductivity, and they could be used in flexible strain sensors. 37 In the previous work of our group, 38 the mechanical properties of hydrogels were enhanced by adding chemical cross-linkers, while the work in this paper only relied on the synergistic effect of non-covalent bonds to achieve the toughening of hydrogels.…”

Ultra-stretchable, Antifatigue, Adhesive, and Self-Healing Hydrogels Based on the Amino Acid Derivative and Ionic Liquid for Flexible Strain Sensors

“…In order to construct multifunctional metal-coordinated hydrogels easily, we developed the hydrogels by introducing functional Schiff base ligands into the polymer network. − For example, we reported two self-healing and multi-stimulus-responsive hydrogels by functional Schiff base ligands. On this basis, we reported a transparent, stretchable, self-healing, adhesive hydrogel sensor that could transmit fluorescent information in this work.…”