Covalent Binging of Palladium Nanoparticles on Chitosan Substrate via Dealdehyde Polysaccharides

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F24%3A63588979" target="_blank" >RIV/70883521:28610/24:63588979 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Covalent Binging of Palladium Nanoparticles on Chitosan Substrate via Dealdehyde Polysaccharides

Original language description

Palladium nanoparticles (PdNPs) have emerged as promising catalysts in various chemical syntheses due to their unique properties, such as high catalytic activity and excellent stability. Polysaccharides, such as chitosan and starch, have been used as green and sustainable templates for the creation of PdNPs. These polysaccharides not only act as stabilizing agents for the nanoparticles but also provide a biocompatible and environmentally friendly approach to nanoparticle synthesis. However, common downsides of polysaccharide usage in PdNPs synthesis include their source-dependent non-stoichiometric composition, variation in molecular weight, and lack of reducing groups. This can be easily overcome by simple selective oxidation of polysaccharides using periodate salt, which introduces a pair of highly reactive aldehyde groups per modified polysaccharide unit. The high reactivity of these newly introduced groups can be utilized not only for the synthesis of various metal nanoparticles, but also in a plethora of other applications (crosslinking, conjugation reactions, etc.). Therefore, our work focused on preparing PdNPs using various dialdehyde polysaccharides (DAPs), specifically dialdehyde dextran (DADXA), dialdehyde cellulose (DAC), and dialdehyde alginate (DAAL). The formed PdNPs synthesized and stabilized by DAPs possess a highly reactive layer on their surface, which can be further modified or bound to amine group-containing substrates such as chitosan via Schiff base reaction, as exemplified in this study.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

21002 - Nano-processes (applications on nano-scale); (biomaterials to be 2.9)

Project

<a href="/en/project/GA23-07361S" target="_blank" >GA23-07361S: Synthesis of gold nanoparticles for SERS and catalysis guided by selectively oxidized polysaccharides</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů