Metal–Phenolic Supramolecular Gelation

Rahim, Md. Arifur; Björnmalm, Mattias; Suma, Tomoya; Faria, Matthew; Ju, Yi; Kempe, Kristian; Müllner, Markus; Ejima, Hirotaka; Stickland, Anthony D.; Caruso, Frank

doi:10.1002/anie.201608413

Cited by 152 publications

(141 citation statements)

References 29 publications

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“…These substances have shown already remarkable properties as antioxidant, antibacterial, antimutagenic, and antitumor agents . Also, their complexation ability enables their functionalization with various metal ions . The usage of these unique properties combined in one molecule leads to great potential uses in biomedical science …”

Section: Introductionmentioning

confidence: 99%

Supramolecular Stimuli‐Responsive Microgels Crosslinked by Tannic Acid

López

Pich

2018

Macromol. Rapid Commun.

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The application of biomolecules as building blocks is substantial for the design of bioinspired dynamic nanomaterials with tailored properties. In this communication, the facile synthesis of aqueous supramolecular temperature-responsive microgels is reported using the natural polyphenol tannic acid (TA) as physical crosslinker. The precipitation polymerization of N-vinylcaprolactam in the presence of this polyphenol leads to the formation of well-defined microgels crosslinked by hydrogen bonds. A systematic variation of the tannic acid content leads to tailored microgel properties. The obtained microgels exhibit reversible temperature-dependent swelling/deswelling and undergo pH-triggered degradation in aqueous solutions.

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Section: Introductionmentioning

confidence: 99%

Supramolecular Stimuli‐Responsive Microgels Crosslinked by Tannic Acid

López

Pich

2018

Macromol. Rapid Commun.

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“…It suggests that broader absorption bands induced by metal‐linked hydrogen from TA enlarges the p‐electron delocalization in the conjugated system and thus changing the corresponding intrinsic optical/electronic properties . Based on above characterization and previous literatures, a scheme for this coordination complexation displayed that three OH groups in TA are deprotonated to generate active moieties induced by tribochemistry, and they are subsequently linked by Fe 3+ or Al 3+ and Ti 2+ or Cu 2+ , which originate from metal oxide surfaces, leading to form the TA‐M materials under tribochemistry.…”

Section: Resultsmentioning

confidence: 74%

“…Inspired by the coordination of polyphenols and metal ions and metal oxide layer,[32b,34] much effort has been dedicated to prepare the coatings for patterning, antifouling, and even forming the capsules via friction. Such ability to induce the films formation opens the possibility for the spatial control of phenolic coatings on different surfaces.…”

Section: Resultsmentioning

confidence: 99%

On‐Site Surface Coordination Complexation via Mechanochemistry for Versatile Metal–Phenolic Networks Films

Kang

Bai

et al. 2019

Adv Materials Inter

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co-workers reported a one-step method to obtain the uniform tannic acid-Fe (TA-Fe) films (11.9 ± 1.2 nm) by changing the pH value of solution. [2] Similar to the assembly of TA-Fe films, 18 different metal ions have been selected to design and prepare MPNs multifunctional capsules. [3] Additionally, a large variety of superstructures based on the polyphenol surface functionalization have been obtained through cross-linking interaction. [4] Such studies show that a design based on coordination bond between polyphenols and various metal ions can provide a platform to prepare multifunctional materials. However, the requirements of synthesis of MPNs are a wet environment, [2] which restricts their widespread applications of monomers with no or poor solubility in solvents. [5] The development of a solvent-free method to prepare MPNs films with tunable properties is an urgent requirement. Mechanochemistry, a green and sustainable technology, [6] is now emerging as an environmentally friendly alternative to conventional solution-based approach in the fields of porous carbon materials, [7] organic reactions, [8] nanomaterials, [9] and metal-organic complexes. [10] Dai and co-workers synthesized The development of functional metal-phenolic networks (MPNs) films by a simple and green strategy on metallic plane substrates for surface modification is a big challenge. Herein, tribochemistry, as an effective and robust method to prepare MPNs films with versatile applications and controllable thickness (≈1.5 nm to 2.2 µm) by surface coordination complexation derived from tannic acid (TA) and metal oxides or ions (M) on plane substrates, is reported. The mechanism of the formation of TA-M films is investigated in detail, showing that films are constructed by two-layer structures. At the bottom of films, the chelation of TA active moieties and M is triggered by friction, facilitating the coating growth and reducing the friction coefficient.There is a downward trend in the concentration of M with the thickness of films increasing, which is attributed to the diffusion of metal ions. As a result, the dominant structure of films changes into the hydrogen bonding or π-π stacking interaction among oligomers derived from coupling of the TA active moieties. Such facile surface modification strategy can broaden in situ mechanochemical synthesis of functional layers and open a promising route for the design of patterning, antifouling, and controlled release coatings.

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“…Caruso and co-workers recently showed that the coordination of tannic acid (TA) with metals enables the synthesis of av ariety of nanoscale and bulk substrates by simple wet chemistry. [28][29][30][31][32][33] This strategy has been employed for the synthesis of various types of multifunctional nanocapsules and combinatorial nanostructures.I nc ontrast, Messersmith and co-workers suggested that plant polyphenols (including TA)c an envelop various substrates without the need for coordination when employed as the sole coating precursor. [34] However,owing to alack of functionality,such systems have not been considered as photoresponsive systems to date even though such systems can be used to control various properties in both time and space.…”

Section: Dedicated To Professor Chulhee Kim On the Occasion Of His 60mentioning

confidence: 99%

“…[28][29][30][31][32][33] This strategy has been employed for the synthesis of various types of multifunctional nanocapsules and combinatorial nanostructures.I nc ontrast, Messersmith and co-workers suggested that plant polyphenols (including TA)c an envelop various substrates without the need for coordination when employed as the sole coating precursor. [28][29][30][31][32][33] This strategy has been employed for the synthesis of various types of multifunctional nanocapsules and combinatorial nanostructures.I nc ontrast, Messersmith and co-workers suggested that plant polyphenols (including TA)c an envelop various substrates without the need for coordination when employed as the sole coating precursor.…”

mentioning

confidence: 99%