An elastomeric, healable, supramolecular polymer blend comprising a chain-folding polyimide and telechelic polyurethane with pyrenyl end groups is compatibilized by aromatic π−π stacking between the π-electron-deficient diimide π-electron-rich units. This interpolymer interaction key to forming tough, elastomeric material. Variable-temperature FTIR analysis of bulk material also conclusively demonstrates presence hydrogen bonding, which complements interactions. SAXS shows that healable...

A novel supramolecular polymer system, in which the terminal pyrenyl groups of a polyamide intercalate into chain-folds polyimide via electronically-complementary pi-pi stacking, shows both enhanced mechanical properties relative to those its individual components and facile healing characteristics as result thermoreversibility non-covalent interactions.

A supramolecular polymer blend, formed via π-π interactions between a π-electron rich pyrenyl end-capped oligomer and chain-folding containing pairs of poor naphthalene-diimide (NDI) units, has been reinforced with cellulose nanocrystals (CNCs) to afford healable nanocomposite material. Nanocomposites varying weight percentage CNCs (from 1.25 20.0 wt %) within the polymeric matrix have prepared solvent casting followed by compression molding, their mechanical properties healing behavior...

A supramolecular elastomer comprising a blend of pyrenyl-tweezer-ended polyamide intercalating with chain-folding polyimide shows near-quantitative thermal healability. It also exhibits greatly enhanced toughness relative to an analogous system in which the end-groups are simple pyrenyl residues, reflecting increased association constant between two complementary binding motifs.

Abstract Although it has been appreciated for most of this century that the coordinating influence many transition metal complexes extends beyond their covalently‐bonded first‐sphere ligands to non‐covalently bound chemical species in so‐called second‐sphere, is only recently fundamental importance phenomenon recognized and researched its general context. Rapid progress possible relatively new area supramolecular chemistry by appealing symbiotic relationship exists between X‐ray...

Utilising supramolecular π–π stacking interactions to drive miscibility in two-component polymer blends offers a novel approach producing materials with unique properties. We report this paper the preparation of network that exploits principle. A low molecular weight polydiimide which contains multiple π-electron-poor receptor sites along its backbone forms homogeneous films siloxane features π-electron-rich pyrenyl end-groups. Compatibility results from complexation process involves...

This mini-review details the recent development of self-healing and mendable polymeric materials which take advantage reversible characteristics non-covalent interactions during their physical recovery process. Supramolecular polymer systems undergo spontaneous (autonomous) healing, as well those require external stimuli to initiate healing process (healable/mendable), are introduced discussed. polymers offer key advantages over alternative approaches, these can typically withstand multiple...

Thermal or chemical treatment of crystalline 4,4′-bipyridinium salts [MCl4]2− (M=Co, Zn, Fe, Pt) leads to HCl loss and formation coordination network solids [{MCl2(4,4′-bipy)}n]. For M=Co, these can also be prepared by mechanochemical means. Their exposure vapor the reaction metal dichlorides with [4,4′-H2bipy]Cl2 gives [4,4′-H2bipy]2+ [CoCl4]2−, [ZnCl4]2−, and, for first time, [FeCl4]2−. Supporting information this article is available on WWW under...

Mechanical properties of healable supramolecular polymer blends correlate to non-covalent “crosslink density”.

Sequence-specific binding is demonstrated between pyrene-based tweezer molecules and soluble, high molar mass copolyimides. The involves complementary π−π stacking interactions, polymer chain-folding, hydrogen bonding extremely sensitive to the steric environment around pyromellitimide binding-site. A detailed picture of intermolecular interactions involved has been obtained through single-crystal X-ray studies complexes with model diimides. Ring-current magnetic shielding polyimide protons...

Hydrogen bonding and charge-transfer interactions stabilize the crystalline 1:1 adduct of [Pt(bpy)(NH3)2]2+[PF6]− dlbenzo-30-crown-10. An X-ray structure analysis showed that crown ether envelopes dication; this coordination in second sphere, which-as UV 1H-NMR data show—also exists solution, is to a great extent made possible by between two benzene rings host molecule pyridine ring guest complex.

A two-component, supramolecular polymer blend has been designed using a novel π-electron rich bis-perylene-terminated polyether. This is able to self-assemble through electronically complementary π–π stacking interactions with π-electron-deficient chain-folding polydiimide afford thermally healable blends. Model compounds were developed assess the suitability of deep green complexes formed between perylene residues and bis-diimides for use in The blends thus synthesised elastomeric nature...

A new, healable, supramolecular nanocomposite material has been developed and evaluated. The comprises a blend of three components: pyrene-functionalized polyamide, polydiimide gold nanoparticles (P-AuNPs). polymeric components interact by forming well-defined π–π stacked complexes between π-electron rich pyrenyl residues deficient residues. Solution studies in the mixed solvent chloroform–hexafluoroisopropanol (6 : 1, v/v) show that mixing (each which is soluble isolation), results...

Spectrophotometric investigations of equimolar mixtures diquat bis(hexafluorophosphate)(2) and a range dibenzo-3n-crown-n ethers [n=6–12; (10)–(16)] in acetonitrile reveal the existence charge-transfer absorption bands at ca.λmax. 400 nm. These absorptions are attributable to intermolecular π–π charge transfer between electron-rich catechol units dibenzo-crown electron-deficient bipyridinium ring system dication. The qualitative conclusion from these experiments, that most stable 1 : complex...

The synthesis and hydrolysis to free carborane (R–CB10H10C–H) a carboxylate under alkaline but not neutral conditions, of five 1,2- 1,7-carboranyl ketones (R–CB10H10C–CO-R′) is described in study the optimum sequence ether, ketone, phenylene groups for poly(ether ketone)(PEK) polymers. 1, 2-Dicarba-closo-dodecaborane (12) behaves as better leaving group than 7 isomer from proposed intermediary anionic adduct hydroxide carbonyl carbon. 1-(4-Fluorophenyl)-1, 2-dicarba-closo-dodecaborane...

A series of new, all-aromatic, macrocyclic biaryls have been obtained by intramolecular, nickel-promoted coupling bis(4-chlorobenzoylphenoxy)-terminated oligomers, and single-crystal X-ray analysis one such macrocycle reveals extreme distortion the biaryl unit; these highly strained materials undergo rapid ring-opening polymerisation in presence nucleophilic initiators to give high molecular weight polyetherketones.