The development of stimulus-responsive polymeric materials is great importance, especially for the remotely manipulated not in direct contact with an actuator. Here we design a photoresponsive supramolecular actuator by integrating host–guest interactions and photoswitching ability hydrogel. A hydrogel α-cyclodextrin as host molecule azobenzene derivative guest exhibits reversible macroscopic deformations both size shape when irradiated ultraviolet light at 365 nm or visible 430 nm....

Supramolecular hydrogels formed by a host-guest interaction show self-healing properties. The cube-shaped with β-cyclodextrin and adamantane guest molecules mend after being broken. sufficiently heal to form single gel, the initial strength is restored. Although contact between freshly cut uncut surface does not gels, two surfaces selectively mend. As service our authors readers, this journal provides supporting information supplied authors. Such materials are peer reviewed may be...

ConspectusSupramolecular assemblies are constructed from at least two molecules through various noncovalent bonding modes such as hydrogen bonding, cationic–anionic electrostatic interactions, aromatic metal–ligand hydrophobic–hydrophilic and charge-transfer interactions. Owing to the dynamic reversible nature of these bonds, assembly disassembly reversible. Molecules self-assemble form most conformationally thermally stable structures The formation interactions is affected by properties...

Abstract Polymer‐based room‐temperature‐phosphorescent (RTP) materials are attractive alternatives to low‐molecular‐weight organic RTP compounds because they can form self‐standing transparent films with high thermal stability. However, their lifetimes in air usually short (<≈0.4 s). Here, the simple amorphous polymer, poly(styrene sulfonic acid) (PSS), exhibits an ultralong lifetime when desiccated. The maximum is 1.22 s, which three times that of previously reported polymers. be...

Abstract Activated crystals of pillar[6]arene produced by removing the solvent upon heating were able to take up branched and cyclic alkane vapors as a consequence their gate‐opening behavior. The uptake activated induced crystal transformation form one‐dimensional channel structures. However, hardly took linear because cavity size is too large stable complexes with alkanes. This shape‐selective behavior was further utilized for improving research octane number an mixture isooctane n...

Supramolecular hydrogels, which are cross-linked via host–guest interactions, show high-performance physical properties, such as elasticity and toughness. Herein we prepare a supramolecular hydrogel without chemical cross-linker. The was prepared by polymerization of the inclusion complexes between β-cyclodextrin acrylamide adamantane monomers. β-cyclodextrin–adamantane gel (βCD–Ad gel) shows high stretching property (990%). initial strain (0%) is restored in several minutes for βCD–Ad...

Herein, we report the synthesis and planar chiral properties of a pair water-soluble cationic pillar[5]arenes with stereogenic carbons. Interestingly, although units molecules were rotatable, only one diastereomer existed in water both cases. As new type source, these transmitted information from cavities to assembly extended π-conjugated compound, affording circularly polarized luminescence (CPL). The chirality transfer process resulting CPL extremely sensitive feed ratio owing combined...

The adhesion between hard materials without any glue is difficult but challenging topic because inhibit molecular mobility and have a large gap on the adhesive interface. Here we show that host–guest interactions realize strong strength semihard based polyacrylamide xerogel by using minimal amount of water. βCD xerogel(x) Ad xerogel(y), where denote β-cyclodextrin adamantane, respectively, increases as molar ratio (mol %) host (x) or guest (y) molecules increases, which indicates xerogel(y)...

Since we discovered pillar[n]arenes in 2008, many chemists have developed a strong interest pillar[n]arene chemistry because of the advantages associated with these materials, including their facile and high yielding synthesis, versatile functionality, planar chirality unique host-guest properties. In this feature article, discuss recent advances field supramolecular based on use as substrates for copper(i)-catalysed alkyne-azide cycloaddition (CuAAC) "click" chemistry. The CuAAC reaction...

Supramolecular materials based on host–guest interactions should exhibit high selectivity and external stimuli‐responsiveness. Among various stimuli, redox photo stimuli are useful for its wide application. An stimuli‐responsive adhesive system between CD host‐gels (CD gels) guest molecules modified glass substrates (guest Sub) is focused. Here, the selective adhesion host gels where depends molecular complementarity reported. Initially, it thought that of a gel material onto hard might be...

The conformations and planar chirality of macrocyclic hosts are great importance because their large influence on the complexation abilities selectivities host molecules. Pillar[n]...

We present a novel system, liquid-state pillar[5]arene decorated with tri(ethylene oxide) chains, that brings electron-donor and electron-acceptor molecules into proximity for efficient exciplex formation. The electron-accepting guests exhibit blue–purple emission from localized excited state upon excitation in common solvents. However, directly dissolving the electron-donating liquid (a bulk system) results visible green formed exciplexes. In guest are always surrounded by excess molecules,...

We report a simple and easy-to-operate method for separating n-alkanes: when we immersed activated pillar[5]arene crystals into mixture of n-alkanes with various chain lengths, the preferentially took up longer lengths.

Pillar[ n]arenes, which were first reported by our group in 2008, are promising macrocyclic compounds supramolecular chemistry. The simple, tubular, and highly symmetrical shape of pillar[ n]arenes has allowed various assemblies with well-defined structures to be constructed. pillar-shaped suitable for surface modification formation one-dimensional (1D) channels. regular polygonal prism organized contributes the construction assembled such as two-dimensional (2D) sheets three-dimensional...

Confinement of polymers in nano-spaces can induce unique molecular dynamics and properties. Here we show weight fractionation by the confinement single polymer chains poly(ethylene oxide) (PEO) one-dimensional (1D) channels crystalline pillar[5]arene. Pillar[5]arene crystals are activated heating under reduced pressure. The immersed melted PEO, causing to selectively take up PEO with high mass fraction. is caused greater number attractive CH/π interactions between C-H groups π-electron-rich...

Ca 2+ /calmodulin-dependent protein kinase II (CaMKII) plays a pivotal role in synaptic plasticity. It is dodecameric serine/threonine that has been highly conserved across metazoans for over million years. Despite the extensive knowledge of mechanisms underlying CaMKII activation, its behavior at molecular level remained unobserved. In this study, we used high-speed atomic force microscopy to visualize activity-dependent structural dynamics rat/hydra/ C. elegans with nanometer resolution....

Controlling dynamic chirality and memorizing the controlled are important. Chirality memory has mainly been achieved using noncovalent interactions. However, in many cases, memorized arising from interactions is erased by changing conditions such as solvent temperature. In this study, planar of pillar[5]arenes was successfully converted into static introducing bulky groups through covalent bonds. Before groups, pillar[5]arene with stereogenic carbon atoms at both rims existed a pair...

Abstract Planar chiral building blocks based on 4,7,12,15‐tetrasubstituted [2.2]paracyclophanes were obtained via a synthetic route involving an optical resolution step. enantiomers, comprising two fluorophores that stacked to form V‐shaped higher‐ordered structure, synthesized from these blocks. The molecules emitted intense circularly polarized luminescence (CPL). Their chiroptical properties compared with those of X‐shaped bearing the same together. CPL sign molecule was opposite...

Abstract Makrocyclen sind wichtige Komponenten der supramolekularen Chemie. 2008 wurde eine neue Klasse von Makrocyclen, die so genannten Pillar[n]arene, entdeckt. Die Forschungsaktivitäten im Bereich Pillar[n]arene haben zur Aufklärung ihrer wichtigen Eigenschaften, wie Form, Reaktionsmechanismen, Wirt‐Gast‐Eigenschaften und vielseitigen Funktionalität, beigetragen, wodurch Entwicklung Pillar[n]aren‐Chemie Anwendung Pillar[n]arenen in verschiedenen Gebieten vorangetrieben wurden. Dieser...

By mechanochromism before vapor exposure, different aromatic vapors induced an obvious vapochromic color change.

We report dual-stimuli, thermo- and photostimuli, responsive chiral assemblies, of planar-chiral pillar[5]arenes with azobenzene groups on their rims. The azobenzene-substituted were synthesized by copper(I)-catalyzed alkyne–azide cycloaddition "click" reaction azide-substituted containing S or R stereogenic carbon atoms an alkyne-substituted azobenzene. These decaazides carbons could act as starting points for a large library pillar[5]arenes. Homeotropic alignment azobenzenes, caused the...

Nucleosome dynamics, such as nucleosome sliding and DNA unwrapping, are important for gene regulation in eukaryotic chromatin. H2A.Z, a variant of histone H2A that is highly evolutionarily conserved, participates by forming unstable multipositioned nucleosomes vivo vitro. However, the subsecond dynamics this have not been directly visualized under physiological conditions. Here, we used high-speed atomic force microscopy (HS-AFM) to visualize human H2A.Z.1-nucleosomes. HS-AFM videos show...

Each nucleosome contains four types of histone proteins, each with a tail. These tails are essential for the epigenetic regulation gene expression through post-translational modifications (PTMs). However, their influence on dynamics at single-molecule level remains undetermined. Here, we employed high-speed atomic force microscopy to visualize in absence N-terminal tail or all tails. Loss stripped 6.7 base pairs from core, and DNA entry-exit angle expanded by 18° that wild-type nucleosomes....