A rapid and reversible thermochromic supramolecular polymer hydrogel and its application in protected quick response codes

Li, Bo; Lin, Cuiling; Lu, Chenjie; Zhang, Jinjin; Tian, He; Qiu, Huayu; Yin, Shouchun

doi:10.1039/c9qm00699k

Cited by 28 publications

(20 citation statements)

References 51 publications

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“…After cooling, the gel recovered due to the reconstrcution of host‐guest interactions. [ 25,33,43 ] Besides, upon addition of KPF 6 , the gel turned into solution because the 21C7 tended to form complex with K + , resulting in the destruction of host‐guest recognition between 21C7 and secondary ammonium salt. The successive addition of 18‐crown‐6 (18C6), which exhibited higher affinity toward K + , made the gel restored.…”

Section: Resultsmentioning

confidence: 99%

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle^†

Zhang

Chen

et al. 2021

Chin. J. Chem.

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Main observation and conclusion Supramolecular polymer networks (SPNs) have always been the focus of research due to their novel features of good processability, stimuli‐responsiveness, self‐healing, and recyclability. Herein, we report the preparation of a metallacycle‐linked supramolecular gel via orthogonal metal‐ligand interactions and host‐guest interactions. A triangular metallacycle with three appended 21‐crown‐7 (21C7) units was obtained by the metal coordination of nickel(II)‐salen‐based dipyridyl ligands and platinum(II) acceptors. The integration of this metallacycle and traditional copolymer bearing secondary ammonium salts constructed a SPN via host‐guest recognition between 21C7 units and ammonium salts, and a supramolecular gel further formed at high concentration. Multiple stimulus responsiveness and self‐healing properties of gel were observed. The gel exhibited better stretchability compared to relative gel formed by copolymer alone owing to the synergistic effect of covalent bonds and supramolecular interactions. Moreover, compared to the model gel without metallacycles, the gel showed higher storage and loss moduli, and exhibited stronger stiffness in the self‐healing tests performed with rheometer, indicating the metallacycle played an important role in improving the stiffness and self‐healing of the gel. Therefore, the feasible approach to the formation of SPNs by the marriage of covalent polymers and metallacycles is expected to open a new way to design novel SPNs.

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Section: Resultsmentioning

confidence: 99%

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle^†

Zhang

Chen

et al. 2021

Chin. J. Chem.

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“…The synthesis and characterization of the requisite AIEgens, which have precedence in the literature, [ 51,52 ] are detailed in the Supporting Information (Figures S1 and S2, Supporting Information). The AIE hydrogels [ 53–55 ] were prepared by mixing PVA with AIE dots in water [ 43–45 ] (Figure S3, Supporting Information), proved through various characterization methods, including rheology, SEM, tensile experiments, and fluorescence spectroscopy. Rheological experiments shown that within a certain frequency range (0.1–100 rad s −1 at a strain of 1%), the storage modulus ( G ′) of the three hydrogels was greater than the loss modulus ( G ″), and was independent of frequency (Figure S4, Supporting Information), indicating the formation of a gel state.…”

Section: Construction Of the Information Code By Interfacial Supramolecular Adhesion Of Different Aie Hydrogelsmentioning

confidence: 99%

Codes in Code: AIE Supramolecular Adhesive Hydrogels Store Huge Amounts of Information

Yang

Zhang

et al. 2021

Advanced Materials

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With the continuous advancement of information technology, the requirements for the information storage capacity of materials are getting higher and higher. However, information code materials usually only store a single piece of information. In order to improve their storage capacity, aggregation‐induced emission (AIE) supramolecular adhesive hydrogels with different fluorescent colors are prepared, and a “Codes in Code” method is used to demonstrate the storage capacity for large amounts of information. Four kinds of poly(vinyl alcohol) (PVA) supramolecular hydrogels with different fluorescent colors are prepared; based on the hydrogen bonds on the hydrogel surface, these hydrogels can be assembled into a hydrogel, G5, which shows multiple fluorescent colors under the irradiation of UV light. When many 1D barcode patterns or/and 2D code patterns are incorporated into G5, not only a kind of 3D information but also plenty of 1D or/and 2D information can be stored. Therefore, the information codes prepared by the “Codes in Code” method can store a large amount of information.

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“…(A) Schematic illustration showing the fabrication of AIE‐active FPH via Host–guest interactions, as well as the cartoon showing the protected quick response (QR) codes with improved durability and security. Reproduced with permission: 2020, The Royal Society of Chemistry [ 52 ] …”

Section: Aggregation‐induced Emissive Polymeric Hydrogels Based On Organic Aiegensmentioning

confidence: 99%

Progress in aggregation‐induced emission‐active fluorescent polymeric hydrogels

et al. 2021

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Aggregation‐induced emission (AIE)‐active fluorescent polymeric hydrogels (FPHs) are the marriage of AIE‐active materials and polymeric hydrogels. Different from the widely studied AIE‐active materials that are primarily used in solution or dry solid state, they feature a three‐dimensional crosslinked polymer network that can absorb water without dissolving. Consequently, they are known to bear many advantageous properties such as soft wet nature, tissue‐like mechanical strength, biocompatibility, biomimetic self‐healing feature, facilely tailored structure, as well as responsive fluorescence and volume/shape changes, thus representing a promising category of luminescent materials with many frontier uses. This Review is intended to give a systematic summary of the recent progress in this young but flourishing research area, with particular focus on their design and preparation. Current challenges and future outlooks in this field are also discussed in order to attract new interests and inspire more efforts.

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A rapid and reversible thermochromic supramolecular polymer hydrogel and its application in protected quick response codes

Abstract: A rapid and reversible thermochromic fluorescent supramolecular polymer hydrogel prepared by orthogonal self-assembly of host–guest and metal coordination interactions, has been used in protected quick response codes.

Cited by 28 publications

References 51 publications

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle^†

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle^†

Codes in Code: AIE Supramolecular Adhesive Hydrogels Store Huge Amounts of Information

Progress in aggregation‐induced emission‐active fluorescent polymeric hydrogels

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A rapid and reversible thermochromic supramolecular polymer hydrogel and its application in protected quick response codes

Abstract: A rapid and reversible thermochromic fluorescent supramolecular polymer hydrogel prepared by orthogonal self-assembly of host–guest and metal coordination interactions, has been used in protected quick response codes.

Cited by 28 publications

References 51 publications

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle†

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle†

Codes in Code: AIE Supramolecular Adhesive Hydrogels Store Huge Amounts of Information

Progress in aggregation‐induced emission‐active fluorescent polymeric hydrogels

Contact Info

Product

Resources

About

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle^†

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle^†