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- Title
Low-temperature heat capacity of heptacopper(II) complex [Cu<sub>7</sub>(μ<sub>3</sub>-Cl)<sub>2</sub>(μ<sub>3</sub>-OH)<sub>6</sub>-( d-pen-disulfide)<sub>3</sub>].
- Authors
Tokoro, N.; Yamashita, S.; Igashira-Kamiyama, A.; Fujioka, J.; Konno, T.; Nakazawa, Y.
- Abstract
A single crystal calorimetry of a heptacopper(II) complex of [Cu7(μ3-Cl)2(μ3-OH)6-( d-pen-disulfide)3] which has a double-cubane structure supported by d-penicillaminedisulfides has been performed at low-temperature region below 8 K. This compound is a metal complex which contains seven Cu(II)s in a cluster unit. These Cu(II)s are magnetically coupled each other by strong intra-complex interactions. The heat capacities under magnetic fields exhibit Schottky type anomalies explained by the Zeeman splitting of the doublet ground state of the complex. The g-value of the ground state is evaluated as 1.86 from the systematic analysis of the Schottky peak under magnetic fields. The first excited state of the cluster seems to be separated at least by several Kelvins, which is consistent with the theoretical calculations and magnetic susceptibility results.
- Subjects
CALORIMETRY; PENICILLAMINE; MAGNETICS; TEMPERATURE measurements; MAGNETIC fields
- Publication
Journal of Thermal Analysis & Calorimetry, 2010, Vol 99, Issue 1, p149
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-009-0514-5