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Photoinduced Energy/Electron Transfer within Single-Chain Nanoparticles.
Angew Chem Int Ed Engl
January 2025
Queensland University of Technology, School of Chemistry and Physics, 2 George Street, 4000, Brisbane, AUSTRALIA.
We demonstrate that single-chain nanoparticles (SCNPs) - compact covalently folded single polymer chains - can increase photocatalytic performance of an embedded catalytic center, compared to the comparable catalytic system in free solution. In particular, we demonstrate that the degree of compaction allows to finely tailor the catalytic activity, thus evidencing that molecular confinement is a key factor in controlling photocatalysis. Specifically, we decorate a linear parent polymer with both photoreactive chalcone moieties as well as Ru(bpy)3 catalytic centers.
View Article and Find Full Text PDFVisible Light Triggerable CO Releasing Micelles.
J Am Chem Soc
December 2024
Department of Chemistry & Biochemistry, University of Denver, Denver, Colorado 80210, United States.
Carbon monoxide (CO), along with nitric oxide and hydrogen sulfide, is one of a trinity of known gasotransmitters, or endogenously produced gaseous molecules that signal and regulate a panoply of physiological functions. CO releasing molecules (CORMs) are chemical tools that enable the study and application of this ephemeral gas, that, ideally, release CO on-demand when externally stimulated. Surveying the available triggers, photolysis is potentially advantageous: It is contactless and grants practitioners unparalleled spatial and temporal control.
View Article and Find Full Text PDFOsteogenic tailoring of oriented bone matrix organization using on/off micropatterning for osteoblast adhesion on titanium surfaces.
Acta Biomater
December 2024
Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan. Electronic address:
Article Synopsis
- Titanium implants are recognized for their strength and stability, essential for effective bone healing, but improving the biological activity of their surfaces presents challenges.
- A new micropatterned titanium substrate using a special polymer (MPC) has been developed to precisely control bone matrix organization, promoting better cell alignment and tissue formation.
- This innovative material enhances bone regeneration by activating the Wnt/β-catenin signaling pathway in cells, setting the stage for tailored medical devices that can actively restore bone microstructure.
Synergistic Degradation of Durable Polymer Networks by Light and Acid Enabled by Pyrenylsilicon Crosslinks.
Adv Mater
December 2024
Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1, Komaba, Meguro-ku, Tokyo, 153-8902, Japan.
Material photocontrol has gained importance in process engineering and biomedical applications. However, highly photoreactive materials are intrinsically unstable to light, which limits their continuous use in lit environments owing to their gradual deterioration. Herein, synergistically photocontrollable materials in the presence of acid are developed to overcome the conventional trade-off between their photoreactivity and photostability.
View Article and Find Full Text PDFPolymorphing Hydrogels Regulated by Photo-reactive DNA Cross-links.
Adv Mater
December 2024
School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123, Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea.
Polymorphing hydrogels can morph into another structure on demand with reprogrammable features. This concept extends the degree of morphing beyond that of traditional shape-morphing hydrogels, which predetermine their morphing capabilities at the fabrication stage. However, current polymorphing hydrogels face limitations due to the need for complex, non-sustained responsiveness or additional chemical steps for reconfigurable morphing.
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