Superparamagnetic-like properties of the valence-trapped Mn IIMnIII7MnIV4 anion in the salt (PPh4)[Mn12O12(O2CEt) 16(H2O)4]

Hui-Lien Tsai, Hilary J. Eppley, Nadine De Vries, Kirsten Folting, George Christou, David N. Hendrickson

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Abstract

Reduction of the 8MnIII,4MnIV complex [Mn 12O12(O2CEt)16(H2O) 3] with PPh4l in CH2Cl2 leads to isolation of (PPh4)[Mn12O12(O 2CEt)16(H2O)4] (3) whose crystal structure shows that the added electron is localized on a formerly Mn III ion to give a trapped-valence MnII,7Mn III,4MnIV situation; DC and AC magnetic susceptibility studies show that 3 has an S = 19/2 ground state and that it displays a superparamagnet-like non-zero, frequency-dependent, out-of-phase response in the AC susceptibility behaviour that is extremely unusual for a molecular species and unique for an ionic species.

Original languageEnglish
Pages (from-to)1745-1746
Number of pages2
JournalJournal of the Chemical Society, Chemical Communications
Issue number15
DOIs
Publication statusPublished - 1994 Dec 1

All Science Journal Classification (ASJC) codes

  • Molecular Medicine

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