Interaction of Carboxyl Groups with Rare Metal Ions on the Surface of Detonation Nanodiamonds

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  • Elena B. Yudina
    Ioffe Institute 26 Politekhnicheskaya 194021 St.‐Petersburg Russian Federation
  • Alexander E. Aleksenskii
    Ioffe Institute 26 Politekhnicheskaya 194021 St.‐Petersburg Russian Federation
  • Irina G. Fomina
    N.S. Kurnakov Institute of General and Inorganic Chemistry Russian Academy of Sciences 31 Leninsky prospect 119991 Moscow Russian Federation
  • Alexander V. Shvidchenko
    Ioffe Institute 26 Politekhnicheskaya 194021 St.‐Petersburg Russian Federation
  • Dmitry P. Danilovich
    St. Petersburg State Technological Institute (technical university) 26 Moskovsky prospect 190013 St.‐Petersburg Russian Federation
  • Igor L. Eremenko
    N.S. Kurnakov Institute of General and Inorganic Chemistry Russian Academy of Sciences 31 Leninsky prospect 119991 Moscow Russian Federation
  • Alexander Ya. Vul
    Ioffe Institute 26 Politekhnicheskaya 194021 St.‐Petersburg Russian Federation

抄録

<jats:p>This paper reports on the grafting of rare‐earth metal ions onto particles of 4–5 nm carboxylated detonation nanodiamond (DND‐COOH). Aqueous solutions of acetates and nitrates (Ln(OOCCH<jats:sub>3</jats:sub>)<jats:sub>3</jats:sub><jats:bold>·</jats:bold>4H<jats:sub>2</jats:sub>O or Ln(NO<jats:sub>3</jats:sub>)<jats:sub>3</jats:sub><jats:bold>·</jats:bold>6H<jats:sub>2</jats:sub>O, Ln = Eu, Gd) were used for the grafting. The ion exchange reaction between rare metal ions and protons of surface carboxyl groups was first detected by conductometry and electrokinetic potential measurements. The equivalence point corresponds to the bond between Ln<jats:sup>3+</jats:sup> and the three carboxylate anions of DND‐COOH. Thus, we have demonstrated an easy synthetic approach for obtaining nanodiamond particles DND‐COOH with surface grafted with a controlled amount of any rare‐earth metal ions (DND‐COO‐ {Ln}, Ln = Ce, Pr, Sm, Eu, Gd, Dy, Ho, Tm). The resulting hybrid material DND‐COO‐{Eu} exhibits photoluminescence properties arising from <jats:italic>f‐f</jats:italic> transitions of Eu<jats:sup>3+</jats:sup> ion.</jats:p>

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