Skip to main content
SpringerLink
Log in

Low-temperature heat capacity of heptacopper(II) complex [Cu7(μ3-Cl)2(μ3-OH)6-(d-pen-disulfide)3]

  • Published:
Journal of Thermal Analysis and Calorimetry Aims and scope Submit manuscript

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.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5

Similar content being viewed by others

References

  1. Christou G, Gatteschi D, Hendrilson DN, Sessoli R. MRS Bull. 2000;25:66.

    CAS  Google Scholar 

  2. Gatteschi D, Sessoli R. Quantum tunneling of magnetization and related phenomena in molecular materials. Angew Chem Int Ed. 2003;42:268–97.

    Article  CAS  Google Scholar 

  3. Coronado E, Palacio F, Veciana J. Molecule-based magnetic materials. Angew Chem Int Ed. 2003;42:2570–72.

    Article  CAS  Google Scholar 

  4. Yoshizawa H, Kazama C, Awaga K, Satoh M, Wada J. Rechargeable molecular cluster batteries. Chem Commun 2007; 3169–70.

  5. Kirn J, Rees DC. Crystallographic structure and functional implications of the nitrogenase molybdenum–iron protein from Azotobacter vinelandii. Nature. 1992;360:553–60

    Article  Google Scholar 

  6. Igashira-Kamiyama A, Fujioka J, Mitsunaga S, Nakano M, Kawamoto T, Konno T. A new class of hydroxo-bridged heptacopper(II) clusters with an acentrosymmetric corner-sharing double-cubane framework supported by D-penicillaminedisulfides. Chem Eur J. 2008;14:9512–5.

    Article  CAS  Google Scholar 

  7. Sorai M, Nakano M, Miyazaki Y. Calorimetric investigations of phase transitions occurring in molecule-based magnets. Chem Rev. 2006;106:976–1031.

    Article  CAS  Google Scholar 

  8. Sorai M, editor. Comprehensive handbook of calorimetry and thermal analysis. Chichester: Wiley and Sons; 2004.

    Google Scholar 

  9. Nakazawa Y, Kawamoto A, Kanoda K. Characterization of low-temperature electronic state of the organic conductors alpha-(BEDT-TTF)2MHg(SCN)4 by specific-heat measurements. Phys Rev. 1995;B52:12890–4.

    Google Scholar 

  10. Yamashita S, Hino K, Inoue Y, Okada Y, Hirahara R, Nakazawa Y, et al. Calorimetric study of molecular superconductor κ-(BEDT-TTF)2Ag(CN)2H2O which contains water in the anion layers. J Therm Anal Calorim. 2008;92:435–8.

    Article  Google Scholar 

  11. Yamase T, Ishikawa E, Fukaya K, Nijiri H, Taguchi T, Atake T. Spin-frustrated (VO)3 6+-triangle-sandwiching octadecatungstates as a new class of molecular magnets. Inorg Chem. 2004;43:8150–7.

    Article  CAS  Google Scholar 

  12. Rousochatzakis I, Ajiro Y, Mitamura H, Kogerler P, Luban M. Hysteresis loops and adiabatic Landau-Zener-Stückelberg transitions in the magnetic molecule {V6}. Phys Rev Lett 2005; 94, 147204 1–4.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Chemistry, Graduate School of Science, Osaka University, Machikaneyama 1-1, Toyonaka, Osaka, Japan

    N. Tokoro, S. Yamashita, A. Igashira-Kamiyama, J. Fujioka, T. Konno & Y. Nakazawa

Authors
  1. N. Tokoro
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. S. Yamashita
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. A. Igashira-Kamiyama
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. J. Fujioka
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. T. Konno
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Y. Nakazawa
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Y. Nakazawa.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Tokoro, N., Yamashita, S., Igashira-Kamiyama, A. et al. Low-temperature heat capacity of heptacopper(II) complex [Cu7(μ3-Cl)2(μ3-OH)6-(d-pen-disulfide)3]. J Therm Anal Calorim 99, 149–152 (2010). https://doi.org/10.1007/s10973-009-0514-5

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10973-009-0514-5

Keywords

Search

Navigation