TY - JOUR
T1 - Mössbauer study of a novel binuclear Fe(II/III) delocalized-valence compound
AU - Ding, X. Q.
AU - Bominaar, E. L.
AU - Bill, E.
AU - Winkler, H.
AU - Trautwein, A. X.
AU - Drüeke, S.
AU - Chaudhuri, PH
AU - Wieghardt, K.
PY - 1990/7/1
Y1 - 1990/7/1
N2 - In this paper, we briefly summarize the main conclusions of the Mössbauer analysis of [L2Fe2(μ-OH)3] (ClO4)2·2CH3OH·2H2O with L=N,N',N"-trimethyl-1,4,7-triazacyclononane, a novel dimeric iron compound, which possesses a central exchange-coupled delocalized-valence Fe(II/III) unit. The complete delocalization of the excess electron in the dimeric iron center is concluded from the indistinguishability of the two iron sites in Mössbauer spectroscopy. The magnetic Mössbauer spectra imply a system spin St=9/2 for the dimer in its ground state. The values for hyperfine and spin-Hamiltonian parameters, obtained from simulations of the Mössbauer spectra, are δ=0.74 mms-1, ΔEQ=-2.14 mms-1, A⊥=-10.6 T, A∥=-13.5 T and D=1.8 cm-1. The system spin St=9/2 is interpreted to be a consequence of double-exchange coupling.
AB - In this paper, we briefly summarize the main conclusions of the Mössbauer analysis of [L2Fe2(μ-OH)3] (ClO4)2·2CH3OH·2H2O with L=N,N',N"-trimethyl-1,4,7-triazacyclononane, a novel dimeric iron compound, which possesses a central exchange-coupled delocalized-valence Fe(II/III) unit. The complete delocalization of the excess electron in the dimeric iron center is concluded from the indistinguishability of the two iron sites in Mössbauer spectroscopy. The magnetic Mössbauer spectra imply a system spin St=9/2 for the dimer in its ground state. The values for hyperfine and spin-Hamiltonian parameters, obtained from simulations of the Mössbauer spectra, are δ=0.74 mms-1, ΔEQ=-2.14 mms-1, A⊥=-10.6 T, A∥=-13.5 T and D=1.8 cm-1. The system spin St=9/2 is interpreted to be a consequence of double-exchange coupling.
UR - http://www.scopus.com/inward/record.url?scp=0002046420&partnerID=8YFLogxK
U2 - 10.1007/BF02101058
DO - 10.1007/BF02101058
M3 - Journal articles
AN - SCOPUS:0002046420
SN - 0304-3843
VL - 53
SP - 311
EP - 315
JO - Hyperfine Interactions
JF - Hyperfine Interactions
IS - 1-4
ER -