Formation of Fine‐Grain Rings on the Surface Region of the Extruded Mg–Gd–Y–Zr–Ag Rod

Abstract

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adem.202201802.

Mechanical Stretch α‐Cyclodextrin Pseudopolyrotaxane Elastomer with Reversible Phosphorescence Behavior

“…Pseudopolyrotaxane NPR was prepared by α‐CD and NPEG in aqueous solution. [ 14 ] Based on 1 H NMR of NPR (Figure S1, Supporting Information), the EG/CD ratio of 2.62 was calculated by comparing the H1 protons of α‐CD at 5.05 ppm (6 H1 protons for 1 α‐CD unit) with the naphthalene protons of NPEG at 8.67 and 8.11 ppm referring to the aromatic region (6 naphthalene protons and 24 EG repeating units for 1 NPEG chain molecule). To study the effect of pseudopolyrotaxane NPR as the non‐covalent cross‐linking agent on supramolecular elastomers, X‐ray diffraction (XRD) and scanning electron microscopy (SEM) experiments of NPR (Figures S2 and S3, Supporting Information) were performed to demonstrate the channel‐type crystal structure with the nanosheet layered morphology.…”

“…[ 13 ] We reported the slide‐ring toughened supramolecular mechanoresponsive elastomer by the copolymerization of 2‐(2‐methoxyethoxy) ethyl methacrylate, slide‐ring cross‐linking agent PR, and mechanically responsive group acrylic modified perylene diimides, showing the mechanically induced fluorescence change of elastomer. [ 14 ] Although PR has been applied to the construction of various soft materials, there are no reports on the mechanical force‐responsive phosphorescence emission systems, to the best of our knowledge. Alternatively, for mechanical force‐responsive phosphorescent materials, the dynamic structure of PR can endow them with enhanced mechanical properties and support the repeated triggering of mechanical force stimulus‐response, achieving the conversion of mechanical force to phosphorescent signals.…”

Polymer Mechanochemistry of Component Parts for Artificial Molecular Machines

“…Folded loop structures consisting of two fluorescent dyes connected in series by a flexible spacer have been demonstrated to unfold mechanically and reversibly with distinctive fluorescence changes in bulk polymeric materials. Symmetric loops with two pyrenes, [195] two perylene diimides (PDIs), [196][197][198] or two cyano-substituted oligo(p-phenylene) vinylenes (cyano-OPVs) [199] formed excimers upon photoirradiation without external mechanical stress but showed monomer fluorescence under mechanical stress (Figure 6e-g). The conformational and fluorescence responses were reversible in the materials.…”

Regulating nonmetallic species beyond the first coordination shell of single-atom catalysts for high-performance electrocatalysis

“…Metal atom beyond FCS is referred to as a double-atom catalyst, [46][47][48] while nonmetallic species beyond FCS (NSBF) can induce noncovalent interactions with the metal center via a long-range electronic inductive effect, hydrogen bonding, or electrostatic interplay. 49 These remote interactions optimize the adsorption/desorption of reactants and intermediates, which is conceptually analogous to the secondary coordination sphere effect in enzyme catalysts. Therefore, regulating the NSBF of SACs has become a hot topic and a series of landmark works have been conducted.…”