Hydroxypyridinone functionalized self-assembled monolayers on nanoporous silica for sequestering lanthanide cations

Wassana Yantasee, Glen E. Fryxell, Yuehe Lin, Hong Wu, Kenneth N. Raymond, Jide Xu

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


1,2-Hydroxypyridinone (1,2-HOPO) ligands were installed as self-assembled monolayers on nanoporous silica (MCM-41) to create a superior class of sorbent materials for lanthanide cations. Lanthanides were used as a model system for the radioactive, expensive, and highly hazardous actinides in preliminary screening studies. The ligand properties of the 1,2-HOPO ligand field and the extremely large surface area of MCM-41, coupled with the dense monolayer coating, contribute to the extremely high lanthanide binding capacity of the 1,2-HOPO nanoporous sorbent. At pH 4-5.9, the mass-weighted partition coefficients (K d) for La, Nd, Eu, and Lu were 354000, 344000, 210800, and 419800, respectively. The rigid, open pore structure of the silica also allows for very rapid sorption. Being silica-based, the sorbent is compatible with vitrification processing into a final glasseous waste form, for subsequent disposition in a deep geological repository.

Original languageEnglish (US)
Pages (from-to)527-529
Number of pages3
JournalJournal of Nanoscience and Nanotechnology
Issue number4
StatePublished - 2005
Externally publishedYes


  • 1,2-Hydroxypyridinone
  • Lanthanides
  • MCM-41
  • Nanoporous Silica

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics


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