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Start Over Author "Nadine de Vries" Journal journal of the chemical society, chemical communications
1 results on '"Nadine de Vries"'

1. Superparamagnetic-like properties of the valence-trapped Mn II Mn III 7Mn IV 4 anion in the salt (PPh4)[Mn12O12(O2CEt)16(H2O)4]

Author

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

Subjects
Crystallography, Valence (chemistry), Stereochemistry, Chemistry, X-ray crystallography, Molecular Medicine, Ionic bonding, Crystal structure, Ground state, Magnetic susceptibility, Superparamagnetism, Ion
Abstract

Reduction of the 8MnIII,4MnIV complex [Mn12O12(O2CEt)16(H2O)3] with PPh4l in CH2Cl2 leads to isolation of (PPh4)[Mn12O12(O2CEt)16(H2O)4](3) whose crystal structure shows that the added electron is localized on a formerly MnIII ion to give a trapped-valence MnII,7MnIII,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.

Published
1994
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