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Themed collection Mechanical Bond and Dynamic Covalent Bond

13 items
Review Article

Dynamic covalent bonds: approaches from stable radical species

Dynamic covalent bonds by stable radical species are ideal platforms for simple, facile, and clean rearrangements of chemical bonds without the need for catalysts and the formation of byproducts.

Graphical abstract: Dynamic covalent bonds: approaches from stable radical species
Review Article

Stimuli-responsive dynamic pseudorotaxane crystals

This review summarizes recent advances in dynamic pseudorotaxane crystals with response to external stimuli, such as light and/or heat.

Graphical abstract: Stimuli-responsive dynamic pseudorotaxane crystals
Review Article

Tailored covalent organic frameworks by post-synthetic modification

This review describes recent advances and scientific challenges in the area of post-synthetic methodologies to tailor the functionalities and properties of COFs.

Graphical abstract: Tailored covalent organic frameworks by post-synthetic modification
From the themed collection: Mechanical Bond and Dynamic Covalent Bond
Review Article

pH-Controlled motions in mechanically interlocked molecules

This review summarizes pH-controlled mechanical motions including translocation in rotaxanes, circumrotation in catenanes and other motions in more sophisticated mechanomolecules.

Graphical abstract: pH-Controlled motions in mechanically interlocked molecules
From the themed collection: Mechanical Bond and Dynamic Covalent Bond
Research Article

Mechanofluorescent polymer/silsesquioxane composites based on tetraarylsuccinonitrile

Mechanofluorescent polymer/silsesquioxane composites were prepared by introducing tetraarylsuccinonitrile derivatives, which are mechanically cleaved to generate the corresponding pink carbon-centred radicals that exhibit yellow fluorescence.

Graphical abstract: Mechanofluorescent polymer/silsesquioxane composites based on tetraarylsuccinonitrile
From the themed collection: Mechanical Bond and Dynamic Covalent Bond
Research Article

Supramolecular polymerization and cyclization of dioxynaphthalene motif bridged bifunctional UPys: minor variations in the molecular skeleton and drastic differences in self-assembly

Dramatic differences were disclosed in the supramolecular polymerizability of dioxynaphthalene motif bridged bifunctional ureidopyrimidinone isomers and their different host–guest behaviors with a blue-box.

Graphical abstract: Supramolecular polymerization and cyclization of dioxynaphthalene motif bridged bifunctional UPys: minor variations in the molecular skeleton and drastic differences in self-assembly
From the themed collection: Mechanical Bond and Dynamic Covalent Bond
Research Article

Push–pull type quinoidal perylene showing solvent polarity dependent diradical character and negative solvatochromism

A push–pull perylene dye shows solvent dependent diradical character and negative solvatochromism.

Graphical abstract: Push–pull type quinoidal perylene showing solvent polarity dependent diradical character and negative solvatochromism
Research Article

Water-compatible fluorescent [2]rotaxanes for Au3+ detection and bioimaging

Rotaxanes were studied for their selective sensing to trivalent metal ions and Au3+ with turn-on fluorescence and for bioimaging.

Graphical abstract: Water-compatible fluorescent [2]rotaxanes for Au3+ detection and bioimaging
From the themed collection: Mechanical Bond and Dynamic Covalent Bond
Research Article

Molecular design to increase the photosensitivity of photochromic phenoxyl–imidazolyl radical complexes

An efficient strategy to increase the photosensitivity of a fast photochromic molecule is demonstrated by introducing aryl groups as sensitizers.

Graphical abstract: Molecular design to increase the photosensitivity of photochromic phenoxyl–imidazolyl radical complexes
From the themed collection: Mechanical Bond and Dynamic Covalent Bond
Research Article

Facile synthesis of diverse rotaxanes via successive supramolecular transformations

Facile synthesis of diverse rotaxanes was successfully realized through a simple and efficient supramolecular transformation strategy.

Graphical abstract: Facile synthesis of diverse rotaxanes via successive supramolecular transformations
From the themed collection: Mechanical Bond and Dynamic Covalent Bond
Research Article

Synthesis of a cyclic poly(methyl acrylate) via topological transformation of a [1]rotaxane

Effective linear-to-cyclic polymer topology transformation of poly(methyl acrylate) (PMA) utilizing the translocation property of the introduced [1]rotaxane unit.

Graphical abstract: Synthesis of a cyclic poly(methyl acrylate) via topological transformation of a [1]rotaxane
From the themed collection: Mechanical Bond and Dynamic Covalent Bond
Research Article

Ring size affects the kinetic and thermodynamic formation of [2]rotaxanes featuring an unsymmetric bis-crown ether component

Kinetically and thermodynamically favored [2]rotaxanes, with an axle component positioned within a large and small ring, respectively, were provided by bridging of a [2]pseudorotaxane formed from an unsymmetric mono-crown ether and the ammonium salt.

Graphical abstract: Ring size affects the kinetic and thermodynamic formation of [2]rotaxanes featuring an unsymmetric bis-crown ether component
From the themed collection: Mechanical Bond and Dynamic Covalent Bond
Research Article

Folic acid functionalized hollow nanoparticles for selective photodynamic therapy of cutaneous squamous cell carcinoma

Folic acid conjugated hollow silica nanocarriers loaded with zinc phthalocyanine are employed for selective photodynamic therapy of cutaneous squamous cell carcinoma.

Graphical abstract: Folic acid functionalized hollow nanoparticles for selective photodynamic therapy of cutaneous squamous cell carcinoma
From the themed collection: Mechanical Bond and Dynamic Covalent Bond
13 items

About this collection

Welcome to Materials Chemistry Frontiers themed collections on “Mechanical Bond and Dynamic Covalent Bond”.

This themed collection covers the development of molecular structures and materials that are built on mechanical bond and dynamical covalent bond, including mechanically interlocked structures (catenanes, rotaxanes, molecular knots), molecular cages, covalent organic frameworks, responsive systems, etc.

Guest Editors: Jishan Wu (National University of Singapore) and Sir Fraser Stoddart (Northwestern University)

More articles will be added as soon as they are published.

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