Generating and stabilizing co(I) in a nanocage environment

Jingmei Shen, Mayfair C. Kung, Zhongliang Shen, Zhen Wang, William A. Gunderson, Brian M. Hoffman, Harold H. Kung

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


A discrete nanocage of core-shell design, in which carboxylic acid groups were tethered to the core and silanol to the shell interior, was found to react with Co2(CO)8 to form and stabilize a Co(I)-CO species. The singular CO stretching band of this new Co species at 1958 cm-1 and its magnetic susceptibility were consistent with Co(I) compounds. When exposed to O2, it transformed from an EPR inactive to an EPR active species indicative of oxidation of Co(I) to Co(II) with the formation of H 2O2. It could be oxidized also by organoazide or water. Its residence in the nanocage interior was confirmed by size selectivity in the oxidation process and the fact that the entrapped Co species could not be accessed by an electrode.

Original languageEnglish
Pages (from-to)5185-5188
Number of pages4
JournalJournal of the American Chemical Society
Issue number14
Publication statusPublished - Apr 9 2014

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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