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Open-Metal and Carboxamide-Tethered Redox-Active Undulated Framework for Mild-Condition Synthesis of Therapeutic Drugs and Tandem Catalysis with Size-Selectivity.
Small
December 2024
Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
A mixed-ligand-based thermo-chemically robust and undulated metal-organic framework (MOF) is developed that embraces carboxamide moiety-grafted porous channels and activation-induced generation of open-metal site (OMS). The guest-free MOF acts as an outstanding heterogeneous catalyst in Hantzsch condensation for electronically assorted substrates with low catalyst loading and short duration under greener conditions than the reported materials. Besides Lewis acidic OMS, the carboxamide group activates the substrate via two-point hydrogen bonding, highlighting the effectiveness of custom-made functionalities in this multi-component reaction.
View Article and Find Full Text PDFArtificial fingerprints engraved through block-copolymers as nanoscale physical unclonable functions for authentication and identification.
Nat Commun
December 2024
Advanced Materials Metrology and Life Sciences Division, INRiM (Istituto Nazionale di Ricerca Metrologica), Turin, Italy.
Besides causing financial losses and damage to the brand's reputation, counterfeiting can threaten the health system and global security. In this context, physical unclonable functions (PUFs) have been proposed to overcome limitations of current anti-counterfeiting technologies. Here, we report on artificial fingerprints that can be directly engraved on a wide range of substrates through self-assembled block-copolymer templating as nanoscale PUFs for secure authentication and identification.
View Article and Find Full Text PDFDevelopment of waterborne epoxy-based resin incorporated with modified natural rubber latex for coating application.
Sci Rep
November 2024
Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Payathai, Bangkok, 10400, Thailand.
Water-based coating has gained much attention globally due to environmental issues. This work aims to develop a waterborne epoxy coating incorporated with modified natural rubber (NR) latex for improved performance. For this purpose, the NR latex was modified into three types of low molecular weight epoxidized natural rubber (LENR) latex.
View Article and Find Full Text PDFLaser solid-phase synthesis of graphene shell-encapsulated high-entropy alloy nanoparticles.
Light Sci Appl
September 2024
Research Centre for Laser Extreme Manufacturing, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.
Article Synopsis
- Rapid synthesis of high-entropy alloy nanoparticles (HEA NPs) using laser solid-phase synthesis offers a practical approach compared to traditional methods which require extreme conditions.
- The process involves using laser irradiation on mixed metal precursors supported by a 3D porous laser-induced graphene (LIG) structure, resulting in nanoparticles that are encased in graphene layers.
- These graphene shell-encapsulated nanoparticles show outstanding electrocatalytic performance for oxygen evolution, with a lower overpotential and longer stability than commercial catalysts, demonstrating the technique's versatility in creating various metal-based nanoparticles.
Behind the scenes: metagenomic analysis of bacterial communities in sustainable depilation of sheepskin.
J Appl Microbiol
November 2024
New Zealand Leather and Shoe Research Association, PO Box 8094, Hokowhitu, Palmerston North 4446, New Zealand.
Aim: The leather industry is embracing eco-friendly technologies for both regulatory compliance and sustainable growth. While enzymatic depilation provides a greener alternative to traditional beamhouse methods, its complexity often leads to higher costs. To address this, we examined the performance of sheepskins' native bacterial flora in acetic acid conditions with low-environmental impact.
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