These two dimers can assemble to a dynamic X-type pillararene tetramer via charge-transfer interactions pictured below, bottom left. According to the researchers, this strategy may provide a new path toward the fabrication of soft and smart supramolecular materials.
Pillararene-Based Cross-Linked Supramolecular Polymers
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A product of and Wiley-VCH. Likewise, supramolecular polymers assembles themself via a combination of noncovalent interactions. Such formation manner endows supramolecular polymers with features, being more sensitive to external stimuli and able to render reversibly dynamic changes in structures and functions.
Being able to degrade in biological environment lowers potential toxicity of polymers to a great extent and therefore, enhances biocompatibility of supramolecular polymers. A bivalent poly isobutylene s PIBs with barbituric acid functionalized at head and tail.
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In this case, the snipped small PIBs-based disks can recover itself from mechanical damage after several-hour contact at room temperature. Taking advantage of coordination interactions between catechol and ferric ions , researchers developed pH -controlled self-healing supramolecular polymers. Chain-folding polyimide and pyrenyl-end-capped chains give rise to supramolecular networks.
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With the excellent nature in biodegradation and biocompatibility , supramolecular polymers show great potential in the development of drug delivery , gene transfection and other biomedical applications. Multiple cellular stimuli could induce responses in supramolecular polymers. On the basis of this property, supramolecular polymers are capable of being a drug carrier.
Supramolecular Polymer Chemistry
Making use of hydrogen bonding between nucleobases to induce self-assemble into pH-sensitive spherical micelles. Effective and low-toxic nonviral cationic vectors are highly desired in the field of gene therapy.
In COS-7 cells, this supramolecular polymersic vector can release enclosed DNA upon exposing to hydrogen peroxide and achieve gene transfection. Rationally designed supramolecular polymers-based polymers can simultaneously meet the requirements of aqueous compatibility, bio-degradability, biocompatibility, stimuli-responsiveness and other strict criterion.
Supramolecular Polymer Chemistry
Other than applications mentioned above, other important and fascinating biomedical applications, like protein delivery,   bio- imaging and diagnosis   and tissue engineering ,   are also well developed. From Wikipedia, the free encyclopedia.
Chemical Reviews. Nature Communications. Macromolecular Rapid Communications. Polymer Chemistry.