Flexible metal-organic materials are of growing interest owing to their ability undergo reversible structural transformations under external stimuli. Here, we report flexible metal-phenolic networks (MPNs) featuring stimuli-responsive behavior diverse solute guests. The competitive coordination metal ions phenolic ligands multiple sites and guests (e.g., glucose) primarily determines the respon...

As the world’s second most abundant renewable natural phenolic polymer after cellulose, lignin is an extremely complex, amorphous, highly cross-linked class of aromatic polyphenolic macromolecules. Due to its special structure, considered be one suitable candidates replace fossil materials, thus research on functional materials has received extensive attention. Because stimuli-sensitive groups ...

Additive manufacturing with stimuli-responsive materials—4D printing—is a rapidly growing field, direct ink writing allowing deposition of wide variety materials. The synthesis humidity-sensitive cholesteric liquid crystal oligomer is reported. With the responsive ink, demonstrator devices exhibiting ink's “four dimensionality” are printed in disparate fashions: as structural color change or pr...