Unprecedented cucurbituril-based ternary host–guest supramolecular polymers mediated through included alkyl chains

Xiao, Xin; Sun, Nana; Qi, Dongdong; Jiang, Jianzhuang

doi:10.1039/c4py00512k

Cited by 19 publications

(10 citation statements)

References 73 publications

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“…Supramolecular HEC-Np/PVA-MV/CB[8] hydrogel bridged the denser floc-like domains of colloidal NFC gel and mediated the healing of NFC network [122]. The recent research on ternary CB[n] complexes [115,123,124,125] gives promise to further developments in self-healing host-guest materials.…”

Section: Preparation Strategiesmentioning

confidence: 99%

Self-Healing Supramolecular Hydrogels Based on Reversible Physical Interactions

Strandman

Zhu

2016

Gels

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Dynamic and reversible polymer networks capable of self-healing, i.e., restoring their mechanical properties after deformation and failure, are gaining increasing research interest, as there is a continuous need towards extending the lifetime and improving the safety and performance of materials particularly in biomedical applications. Hydrogels are versatile materials that may allow self-healing through a variety of covalent and non-covalent bonding strategies. The structural recovery of physical gels has long been a topic of interest in soft materials physics and various supramolecular interactions can induce this kind of recovery. This review highlights the non-covalent strategies of building self-repairing hydrogels and the characterization of their mechanical properties. Potential applications and future prospects of these materials are also discussed.

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Section: Preparation Strategiesmentioning

confidence: 99%

Self-Healing Supramolecular Hydrogels Based on Reversible Physical Interactions

Strandman

Zhu

2016

Gels

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“…Thus, although such guest‐guest interactions may exist, the interactions are often called “host–guest interactions” in general terms in the literature. In the following section, the driving forces of the polymerization of covalent monomers to fabricate linear or hyperbranched polymers will be roughly classified according to the original work into three types: a) HSCT interactions, b) host‐enhanced π–π interactions, and c) other host–guest interactions . There are virtually no pros and cons for different driving forces, as each designed monomer just applies to corresponding driving forces. a) HSCT Interactions …”

Section: Cucurbit[8]uril‐based Polymersmentioning

confidence: 99%

“…In this way, a self‐sorting system among aromatic and aliphatic motifs was developed to promote and control supramolecular polymerization. As indicated by analytical ultracentrifugation, the molecular weight of supramolecular polymers could be well tuned from 10 × 10 4 g mol −1 to 50 × 10 4 g mol −1 by changing the content of CB[7]. vi) Miscellaneous : Two alkyl groups instead of two aromatic moieties were also reported as guests to construct ternary host–guest supramolecular polymer system, depending on multiple hydrogen bonding interactions with different modes between the host and guest molecules as well as between the host and host molecules . The binding constants for CB[8] and the two monomers were determined to be 4.87 ± 0.23 × 10 5 and 8.49 ± 0.17 × 10 5 M −1 , respectively.…”

Section: Cucurbit[8]uril‐based Polymersmentioning

confidence: 99%

Cucurbit[8]uril‐Based Polymers and Polymer Materials

Zou

Liu

et al. 2018

Small

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Cucurbit[8]uril (CB[8]) is unique and notable in the cucurbit[n]uril family, since it has a relatively large cavity and thus is able to simultaneously accommodate two guest molecules. Typically, an electron-deficient first guest and an electron-rich second guest can be bound by CB[8] to form a stable 1:1:1 heteroternary supramolecular complex. Additionally, two homo guests can also be strongly dimerized inside the cavity of CB[8] to form a 2:1 homoternary supramolecular complex. During the past decade, by combining polymer science and CB[8] host-guest chemistry, a variety of systems have been established to construct supramolecular polymers with polymer chains typically at the nanoscale/sub-microscale, and CB[8]-based micro/nanostructured polymer materials in the form of polymer networks and hydrogels, microcapsules, micelles, vesicles, and colloidal particles, normally in solution and occasionally on surfaces. This Review summarizes the noncovalent interactions and strategies used for the preparation of CB[8]-based polymers and polymer materials with a focus on the representative and latest developments, followed by a brief discussion of their characterization, properties, and applications.

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“…In 2008, Kim et al reported that alkyl chains can adopt a U-shaped conformation when bound in the cavity of Q[8] [ 16 ]. Later, our group discovered that not only can two alkyl groups be encapsulated in the same Q[8] host instead of two aromatic groups [ 17 ], this can also further result in the ternary complex forming supramolecular polymers [ 18 ]. Herein, as part of our continued interest in Q[8] ternary complexes, we wondered whether two cyclohexyl groups could be encapsulated in the same Q[8] host cavity.…”

Section: Introductionmentioning

confidence: 99%