Diazonium salt-mediated synthesis of new amino, hydroxy, propargyl, and maleinimido-containing superparamagnetic Fe@C nanoparticles as platforms for linking bio-entities or organocatalytic moieties

  • Alexander Bunge
  • Lidia Magerusan
  • Ion Morjan
  • Rodica Turcu
  • Gheorghe Borodi
  • Jürgen LiebscherEmail author
Research Paper


New magnetic Fe@C nanoparticles in the size range of about 20–50 nm functionalized with amino, hydroxy, propargyl, or maleinimido groups were synthesized by reaction with aryl diazonium salts. Aryl diazonium salts wherein the functional groups are linked via a sulfonamide moiety turned out to be advantageous over those with direct linkage. The obtained Fe@C nanoparticles represent magnetic nanoplatforms for linking bio-entities and organocatalysts using amide formation, CuAAC, or thiol-ene click chemistry as exemplified by selected examples. The Fe@C nanoparticles obtained exhibit supramolecular behavior with high value of saturation magnetization rendering them attractive for practical applications in biomedicine and organocatalysis.

Graphical Abstract


Magnetic nanoparticles Click chemistry Diazonium salts Biotin Sulfonamides Carbon shell 



The authors wish to acknowledge Dr. Ioan Bratu for FTIR measurements, Dr. Cristian Leostean for conducting XPS and magnetic measurements, Dr. Lucian Barbu for TEM investigations.

Supplementary material

11051_2015_3167_MOESM1_ESM.doc (6.3 mb)
Supplementary material 1 (DOC 6452 kb)


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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Alexander Bunge
    • 1
  • Lidia Magerusan
    • 1
  • Ion Morjan
    • 2
  • Rodica Turcu
    • 1
  • Gheorghe Borodi
    • 1
  • Jürgen Liebscher
    • 1
    • 3
    Email author
  1. 1.National Institute of Research and Development for Isotopic and Molecular TechnologiesCluj-NapocaRomania
  2. 2.National Institute for Lasers, Plasma and Radiation PhysicsBucharestRomania
  3. 3.Department of ChemistryHumboldt-University BerlinBerlinGermany

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