Synthesis of a new class of molecule Li+@C60O -(OH)7 as a "cation-encapsulated anion nanoparticie" by multihydroxylation of Li-encapsulated fullerene

Hiroshi Ueno, Yuji Nakamura, Naohiko Ikuma, Ken Kokubo, Takumi Oshima

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Treatment of [Li+@C60](PF6-) with 30% fuming sulfuric acid and subsequent hydrolysis gave hydroxylated derivative Li+@C60O-(OH)7 Its structure was deduced by IR, NMR, MALDI- TOF/FAB MS, and elemental analysis. Notably, the reaction of [Li+@C60](PF6 -) was site- selective, giving a single major isomer (ca. 70%) with two minor isomers, in marked contrast to the case of empty C6o- Furthermore, the results clearly indicate that the internal Li cation was strongly shielded by the surface dipolar hydroxyl groups, and thus it appears that the properties of endohedral fiillerenes can be controlled by the external modification of the fullerene cage. Whereas Li+@C60 is relatively insoluble, Li+@C60CT(OH)7 was found to be highly soluble in polar solvents such as DMSO and DMF. The increased solubility is especially desirable for biological/medicinal assays and applications in such research fields.

Original languageEnglish
Title of host publicationCarbon Nanomaterials
PublisherMaterials Research Society
Number of pages6
ISBN (Print)9781632660985
Publication statusPublished - 2013
Externally publishedYes
Event2012 MRS Fall Meeting - Boston, MA, United States
Duration: 2012 Nov 252012 Nov 30

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2012 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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