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Covalent mechanochemical functionalization of carbon-encapsulated iron nanoparticles towards the improvement of their colloidal stability

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dc.abstract.enThe mechanochemical covalent functionalization of carbon-encapsulated iron nanoparticles (CEINs) is reported. Unprotected sugars (mannose, galactose, β-cyclodextrin) and amino sugars (glucosamine and chitosan) were successfully conjugated to the surface of CEINs. The developed grinding-induced methods employ (i) the 1,3-dipolar cycloadditions of nitrile oxides or azomethine ylides and (ii) amidation- type reactions with the inclusion of carboxyl-functionalized CEINs and amino sugars. All the developed mechanochemical processes are fast (reaction time 10 min) and result in high degrees of coverage (7.3–31.5 wt%). The presented functionalization routes also constitute easy to perform and environmentally improved protocols. Moreover, the use of toxic organic solvents is not required. A comprehensive study on the colloidal stability of the sugar-functionalized CEINs is also included in this work. The results of the turbidimetric analyses reveal that both grinding-induced formation of amide bonds and thecycloadditions of sugar moieties to the surface of CEINs result in the significant improvement of their colloidal stability. The highest stability of the aqueous dispersion was found for CEINs functionalized withβ-cyclodextrin. The comparative studies between the classical wet approach and the grinding-induced functionalization of CEINs show that the herein developed environmentally improved method increasesthe colloidal stability three times. The crucial role of the mechanochemical approach in the covalent functionalization of CEINs and the improvement of their colloidal stability is discussed in this work.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorKasprzak, Artur
dc.contributor.authorKaszuwara, Waldemar
dc.contributor.authorFateyeva, Kristina
dc.contributor.authorKoszytkowska-Stawińska, Mariola
dc.contributor.authorPopławska, Magdalena
dc.contributor.authorBystrzejewski, Michał
dc.contributor.authorFronczak, Maciej
dc.date.accessioned2024-01-24T20:54:07Z
dc.date.available2024-01-24T20:54:07Z
dc.date.issued2018
dc.description.financeNie dotyczy
dc.description.number32
dc.description.volume47
dc.identifier.doi10.1039/C8DT01795F
dc.identifier.issn1477-9226
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/103847
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofDalton Transactions
dc.relation.pages11190-11202
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enCarbon-encapsulated iron nanoparticles
dc.subject.enmechanochemical covalent functionalization
dc.subject.enColloidal stability
dc.titleCovalent mechanochemical functionalization of carbon-encapsulated iron nanoparticles towards the improvement of their colloidal stability
dc.typeJournalArticle
dspace.entity.typePublication