Synthesis of Stable Cerium Oxide Nanoparticles Coated with Phosphonic Acid-Based Functional Polymers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985882%3A_____%2F23%3A00574760" target="_blank" >RIV/67985882:_____/23:00574760 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/62156489:43210/23:43923678 RIV/00216208:11320/23:10475818

Výsledek na webu

<a href="https://doi.org/10.1021/acs.langmuir.3c00576" target="_blank" >https://doi.org/10.1021/acs.langmuir.3c00576</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.langmuir.3c00576" target="_blank" >10.1021/acs.langmuir.3c00576</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Synthesis of Stable Cerium Oxide Nanoparticles Coated with Phosphonic Acid-Based Functional Polymers

Popis výsledku v původním jazyce

Functionalpolymers, such as poly(ethylene glycol) (PEG), terminatedwith a single phosphonic acid, hereafter PEG( ik)-Ph are often applied to coat metal oxide surfaces duringpost-synthesis steps but are not sufficient to stabilize sub-10 nmparticles in protein-rich biofluids. The instability is attributedto the weak binding affinity of post-grafted phosphonic acid groups,resulting in a gradual detachment of the polymers from the surface.Here, we assess these polymers as coating agents using an alternativeroute, namely, the one-step wet-chemical synthesis, where PEG( ik)-Ph is introduced with cerium precursorsduring the synthesis. Characterization of the coated cerium oxidenanoparticles (CNPs) indicates a core-shell structure, wherethe cores are 3 nm cerium oxide and the shell consists of functionalizedPEG polymers in a brush configuration. Results show that CNPs coatedwith PEG(1k)-Ph and PEG(2k)-Ph are of potentialinterest for applications as nanomedicines due to their high Ce(III)content and increased colloidal stability in cell culture media. Wefurther demonstrate that the CNPs in the presence of hydrogen peroxideshow an additional absorbance band in the UV-vis spectrum,which is attributed to Ce-O-2 (2-) peroxo-complexes and could be used in the evaluation of their catalyticactivity for scavenging reactive oxygen species.

Název v anglickém jazyce

Synthesis of Stable Cerium Oxide Nanoparticles Coated with Phosphonic Acid-Based Functional Polymers

Popis výsledku anglicky

Functionalpolymers, such as poly(ethylene glycol) (PEG), terminatedwith a single phosphonic acid, hereafter PEG( ik)-Ph are often applied to coat metal oxide surfaces duringpost-synthesis steps but are not sufficient to stabilize sub-10 nmparticles in protein-rich biofluids. The instability is attributedto the weak binding affinity of post-grafted phosphonic acid groups,resulting in a gradual detachment of the polymers from the surface.Here, we assess these polymers as coating agents using an alternativeroute, namely, the one-step wet-chemical synthesis, where PEG( ik)-Ph is introduced with cerium precursorsduring the synthesis. Characterization of the coated cerium oxidenanoparticles (CNPs) indicates a core-shell structure, wherethe cores are 3 nm cerium oxide and the shell consists of functionalizedPEG polymers in a brush configuration. Results show that CNPs coatedwith PEG(1k)-Ph and PEG(2k)-Ph are of potentialinterest for applications as nanomedicines due to their high Ce(III)content and increased colloidal stability in cell culture media. Wefurther demonstrate that the CNPs in the presence of hydrogen peroxideshow an additional absorbance band in the UV-vis spectrum,which is attributed to Ce-O-2 (2-) peroxo-complexes and could be used in the evaluation of their catalyticactivity for scavenging reactive oxygen species.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

<a href="/cs/project/LM2015057" target="_blank" >LM2015057: Laboratoř fyziky povrchů – Optická dráha pro výzkum materiálů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Langmuir

ISSN

0743-7463

e-ISSN

—

Svazek periodika

39

Číslo periodika v rámci svazku

23

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

8141-8152

Kód UT WoS článku

001011132500001

EID výsledku v databázi Scopus

2-s2.0-85162258621