Organometallic Hydrogels

Abstract

Hydrogels are soft materials with distinct three dimensional (3D) networks capturing al arge water content. The similarity of hydrogels to naturalt issueh as made them the most promisingb iomaterials foru se in human bodies. During the past several decades, hydrogels have attracted considerable attention from scientists in different research fields. With their contributions, the research in this field has experienceds ignificant advances both in content and in style. Organometallic hydrogels, one special category of hydrogelsi nw hich metal ions participate in the 3D networks, have become one of the pioneering types of soft materials. Endowed with the unique properties of metal ions and coordination chemistry's structural diversity,t his type of material has shown great potentialf or intelligent materials as part of as mart future.I nt his review,w ef ocuso nt he state-of-theart achievements in organometallic hydrogels and provide bottom-up insights from structure to applications.

Mechanism of gelation in low-concentration aqueous solutions of silver nitrate with l-cysteine and its derivatives

“…We consider that a decrease in the solubility of SM supramonomers at low concentrations of the electrolyte is explained by the fact that metal ions can form complexes with amino acids as in the case of organometallic hydrogels. 54,55 At that, a metal ion can coordinate both a special functional group of SM and a few groups together. 56 Therefore, the silver mercaptide aggregates that belong to complexes containing also metal ions interact with water molecules other than those that are in the unbound state, since functional groups coordinated by metal ions do not form hydrogen bonds with water.…”

A review of recent advances in metal ion hydrogels: mechanism, properties and their biological applications

“…2C). 39,86,87 In addition to the common redox-responsiveness, temperatureresponsiveness, pH-responsiveness, some metal based hydrogels were also affected by light, 74 magnetic field 88 and other factors. What's more, the stimuli-responsiveness of metal ions to hydrogels was often not single, but may have multiple responsiveness at the same time, which will greatly broaden the application field of metal ion hydrogels (Fig.…”

Constructing ECM-like Structure on the Plasma Membrane via Peptide Assembly to Regulate the Cellular Response

“…To enhance the targeting resolution of EISA from whole membrane to membrane compartments, structural modification of the hydrogelator was required. Our study of the metallohydrogelator suggested that incorporating transition-metal complexes into the peptide design induced conformational rigidity and oriented side chains, leading to novel self-assembling nanostructures . For instance, ruthenium­(II) polypyridyl complex (Ru­(II) complex)-peptide conjugates self-assembled into thin nanofibers with a single molecular width .…”