Automatic repair: A polymer with pendent dibenzo[24]crown-8 units (purple in picture) was cross-linked by two bisammonium salts (green) to form supramolecular gels based on host–guest interactions. These are stimuli-responsive materials that respond changes of the pH value and also self-healing materials, as can be seen eye evidenced rheological data.

CONSPECTUS: Supramolecular polymers, fabricated via the combination of supramolecular chemistry and polymer science, are polymeric arrays repeating units held together by reversible, relatively weak noncovalent interactions. The introduction interactions, such as hydrogen bonding, aromatic stacking metal coordination, host-guest endows polymers with unique stimuli responsiveness self-adjusting abilities. As a result, diverse monomer structures have been designed synthesized to construct...

The trans form of an azobenzene-containing guest can complex with a pillar[6]arene, while it cannot pillar[5]arenes due to the different cavity sizes pillar[6]arene and pillar[5]arenes. spontaneous aggregation its host-guest be reversibly photocontrolled by irradiation UV visible light, leading switch between irregular aggregates vesicle-like aggregates. This new pillar[6]arene-based photoresponsive recognition motif work in organic solvents is good supplement existing widely used...

A host–guest recognition motif based on a crown ether moiety was employed to construct supramolecular polymer gel from low molecular weight A–B monomer. Reversible thermo- and pH-induced gel–sol transitions of the dual-responsive are demonstrated for controlled release rhodamine B. Detailed facts importance specialist readers published as ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by authors. Please note: The...

The dynamic duo: Different topologies of supramolecular polymers, such as linear (see picture, left) and cross-linked species (right), can be reversibly interconverted by external stimuli that utilize host–guest metal–ligand non-covalent recognition motifs. Detailed facts importance to specialist readers are published "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted the authors. Please note: publisher is responsible for...

A crown ether appended super gelator is designed and synthesized. It can gel a variety of organic solvents shows excellent gelation properties with both low critical concentration short time. Due to the introduction moiety secondary ammonium unit, supramolecular gels show reversible gel-sol transitions. The also be molded into shape-persistent free-standing objects.

Automatische Reparatur: Ein Polymer mit Dibenzo[24]Krone-8-Einheiten (violett im Bild) als Seitenarmen wurde durch zwei Bisammoniumsalze (grün) unter Nutzung von Wirt-Gast-Wechselwirkungen zu supramolekularen Gelen verknüpft. Beide Gele sind Materialien, die auf externe Auslöser reagieren, hier Änderungen des pH-Wertes, und zudem selbstheilend, wie für das Auge sichtbar ist Rheologie-Messungen gezeigt wurde.

By fine-tuning the reaction temperature to 5, 15, 30, and 50 degrees C, respectively, four different complexes, [Cd(HC4O4)2(H2O)4] (1), [Cd4(C4O4)4(H2O)16].(H2O)2 (2), [Cd(C4O4)(H2O)2] (3), (4), were formed successfully from identical initial mixture. Moreover, an unprecedented reversible interconversion among complexes at corresponding temperatures mediated by mother liquor was observed.

The formation of catenated systems can be simplified greatly if one or more rings are generated via self-assembly. Herein we exploit the orthogonality coordination-driven self-assembly and crown-ether host–guest complexation to obtain a [4]molecular necklace [7]molecular based on well-developed recognition motif 1,2-bis(pyridinium)ethane/dibenzo[24]crown-8. By adapting bis(pyridinium) into backbone donor building block, resulting semirigid dipyridyl species serve both as structural element...

We demonstrate that n-octylethyl ammonium hexafluorophosphate (G) can thread through the cavity of 1,4-dimethoxypillar[5]arene to form a [2]pseudorotaxane with binding constant 1.09 (±0.31) × 10(3) M(-1) in chloroform. The formation this threaded structure has been confirmed by proton NMR spectroscopy, electrospray ionization mass spectrometry, and X-ray single crystal analysis. complexation between G chloroform be switched off adding Cl(-). For comparison, 1,4-bis(n-propoxy)pillar[5]arene...

The host−guest complex of dipropoxypillar[5]arene and an ionic liquid 1,3-dimethylimidazolium iodide is found to exhibit a lower critical solution temperature (LCST)-type phase transition in chloroform. This LCST-type behavior can be conveniently modulated by experimental parameters easily combined with the for potential application product educt separation.

A novel pH-responsive supramolecular polymer based on the pillar[5]arene/imidazolium cation recognition motif was successfully prepared. It demonstrated that binding strength between monomer molecules in solution could be reduced by adding base, thereby leading to a decrease polymerization degree, while reverse switch achieved addition of acid change back cationic state. These processes were confirmed 1H NMR, DOSY experiments, viscosity measurements and theoretical calculations. Moreover,...

In the fight of bacteria with human, have regained upper hand by development antibiotic resistance. The emergence resistance has outpaced new antibiotics, and investment in research antibiotics is diminishing, which caused world entering into a post-antibiotic era for that minor injuries common infections can kill human beings future. Supramolecular macrocycles, due to their unique structures, facile versatile functionality, abundant host–guest complexation abilities, dynamic modular...

Abstract Adhesive materials have played an essential role in the history of humanity. Natural adhesives composed low‐molecular‐weight monomers been overshadowed by modern petroleum‐based glues. With development green economy, demand for eco‐friendly has increased. Herein, two natural biocompatible compounds, namely thioctic acid ( TA ) and malic MA ), are selected to prepare a high‐performance pressure‐sensitive adhesive poly[ ‐ ]. This can be quantitatively obtained via simple mixing...

Based on two self-sorting host–guest recognition motifs, novel linear main-chain polypseudorotaxanes with supramolecular polymer backbones have been constructed from three components in solution at high concentrations.

Taco complex templation based on the bis(m-phenylene)-32-crown-10/paraquat recognition motif is used to develop a general method for preparing mechanically interlocked molecules. A [2]rotaxane and [2]catenane were synthesized in high yields by ring-closing metathesis reaction, which was owed impactful template effect. Due symmetry of (5,5')-difunctional bis(m-phenylene)-32-crown-10 derivatives, this taco templated synthesis has potential be tempting solve symmetry-based problem fabrication...

A new azobenzene-bridged cryptand was synthesized; it can be well controlled between cis and trans isomers by irradiation with different wavelengths or being heated. It found that this exhibits an ON−OFF binding ability 2,7-diazapyrenium (DAP) derivatives. binds DAP derivatives as the isomer only, demonstrated various methods. The fluorescence property of endows these host−guest systems detectable fluorescent output signals, which makes monitoring photoresponsive convenient.

Ein Wirt-Gast-Erkennungsmotiv auf Basis eines Kronenethers wurde verwendet, um ein supramolekulares Polymergel aus einem niedermolekularen AB-Monomer herzustellen. Das Gel ist doppelt responsiv: Es geht wärme- und pH-induzierte Gel-Sol-Übergänge ein, die zur kontrollierten Freisetzung von Rhodamin B genutzt wurden. Detailed facts of importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available...

A muscle-like metallo-supramolecular polymer based on a solvent-driven [<italic>c</italic>2]daisy chain has been prepared from an amino-modified pillar[5]arene. The integration of terpyridine moieties both ends the and stiff architecture pillar[5]arene units facilitated efficient formation polymer.

Although the gelation process and lower critical solution temperature (LCST) behavior are well acknowledged in polymer systems, low-molecular-weight gelators (LMWGs) rarely display LCST during supramolecular gelation. Herein, we report an LMWG system with LCST-type thermoresponsiveness LCST-triggered process. Temperature plays a crucial role this system, not only affecting phase separation but also triggering The backbones (three-dimensional structures) of resulting hydrogel hierarchical...

Herein we report an unprecedented chiral induction of anion-coordination-driven tetrahedra (A4L6-type) by peripheral guests, S-, R-α-methylcholine and R-β-methylcholine, which are bound along the tetrahedral edges in a highly site-specific fashion. This "peripheral templation", has proven indispensable for formation structure, is also effective approach to encoding information tetrahedron. Moreover, site-selective binding choline derivatives anion cage with induced one-handedness may imply...

Inspired by the ultrahigh reactivity of Fe–N4 active site in natural enzyme horseradish peroxidase (HRP), this work designs and fabricates a two-dimensional (2D) metal–organic framework (MOF)-based nanozyme, 2D Cu-TCPP(Fe) MOFs, involving long-ordered arrangement macrocyclic units. The has been constructed bridging coordination between Cu(II) ions peripheral carboxyl groups Fe(III) ion-centered metalloporphyrin TCPPFe. Taking H2O2 3,3′,5,5′-tetramethylbenzidine (TMB) as substrates, nanozyme...

Abstract An azobenzene‐functionalized bis‐bis(urea) ligand ( L azo ) and phosphate anion assemble to give the first photoactive “aniono” constructs, tetrahedron (A 4 6 helicate 2 3 ), which readily undergo interconversion through cis ‐ trans isomerization of group under irradiation/heating. Most strikingly, tetrahedral cage can accommodate an [18]crown‐6 molecule, capture two tetramethylammonium (TMA + ions with unusually high affinity, even capable replacing K in [K([18]crown‐6)] form a...