Correlated electrons in the Eu exchanged preyssler anion [EuP{sub 5}W{sub 30}O{sub 110}]{sup n-}.

Journal Article · Wed Jun 26 04:00:00 EDT 2002 · J. Am. Chem. Soc.

DOI:https://doi.org/10.1021/ja025821d· OSTI ID:949672

Soderholm, L; Antonio, M R; Skanthakumar, S; Williams, C W

The Eu-encrypted Preyssler anion, [EuP{sub 5}W{sub 30}O{sub 110}]{sup n-}, demonstrates unusual electronic properties as a function of applied potenial. The Preyssler anion itself, when exchanged with a nonredox active trivalent ion such as La{sup 3+}, is electroactive in acidic solution, reversibly accepting up to 10 electrons under reducing conditions. Encrypted Eu, which is trivalent at rest potential, is reduced concomitantly with the framework. The details of this reduction are probed with Eu L{sub 3}-XANES, coulometry, and magnetic susceptibility. The results are interpreted in terms of a bonding interaction between the Eu f-states and the W-O framework band, facilitated by the crossing of the framework Fermi level with the localized states. Such behavior has been previously observed in intermediate-valent and correlated-electron systems. The observation of such behavior in an isolated cluster opens the door for new avenues of research into correlated-electron behavior.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 949672
• Report Number(s): ANL/CHM/JA-43160
• Journal Information: J. Am. Chem. Soc., Journal Name: J. Am. Chem. Soc. Journal Issue: 25 ; Jun. 26, 2002 Vol. 124; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANIONS
BONDING
DOORS
ELECTRONS
F STATES
FERMI LEVEL
MAGNETIC SUSCEPTIBILITY
VOLTAMETRY