Jump to main content
Jump to site search

Issue 22, 2015
Previous Article Next Article

Magnetic and magnetocaloric properties of an unusual family of carbonate-panelled [Ln III6Zn II2] cages

Author affiliations

Abstract

The reaction of the pro-ligand H4L, which combines the complementary phenolic oxime and diethanolamine moieties within the same organic framework, with Zn(NO3)2·6H2O and Ln(NO3)3·6H2O in a basic methanolic solution generates a family of isostructural heterometallic coordination compounds of general formula [Ln6Zn2(CO3)5(OH)(H2L)4(H3L)2(H4L)]NO3·xMeOH [Ln = Gd, x = 30 (1), Ln = Dy, x = 32 (2), Ln = Sm, x = 31 (3), Ln = Eu, x = 29 (4), Ln = Tb, x = 30 (5)]. The octametallic skeleton of the cage describes a heavily distorted [GdIII6] octahedron capped on two faces by ZnII ions. The metal core is stabilised by a series of μ3- and μ4-CO32− ions, originating from the serendipitous fixation of atmospheric CO2. The magnetic properties of all family members were examined via SQUID magnetometry, with the χMT product and VTVB data of the Gd analogue (1) being independently fitted by numerical diagonalisation to afford the same best-fit parameter JGd–Gd = −0.004 cm−1. The MCE of complex 1 was elucidated from specific heat data, with the magnetic entropy change reaching a value of 22.6 J kg−1 K−1 at T = 1.7 K, close to the maximum entropy value per mole expected from six GdIII spins (SGd = 7/2), 23.7 J kg−1 K−1.

Graphical abstract: Magnetic and magnetocaloric properties of an unusual family of carbonate-panelled [LnIII6ZnII2] cages

Back to tab navigation

Supplementary files

Article information


Submitted
30 Mar 2015
Accepted
08 May 2015
First published
08 May 2015

This article is Open Access

Dalton Trans., 2015,44, 10315-10320
Article type
Paper
Author version available

Magnetic and magnetocaloric properties of an unusual family of carbonate-panelled [LnIII6ZnII2] cages

W. Sethi, S. Sanz, K. S. Pedersen, M. A. Sørensen, G. S. Nichol, G. Lorusso, M. Evangelisti, E. K. Brechin and S. Piligkos, Dalton Trans., 2015, 44, 10315
DOI: 10.1039/C5DT01240F

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

Reproduced material should be attributed as follows:

  • For reproduction of material from NJC:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
  • For reproduction of material from PCCP:
    [Original citation] - Published by the PCCP Owner Societies.
  • For reproduction of material from PPS:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
  • For reproduction of material from all other RSC journals:
    [Original citation] - Published by The Royal Society of Chemistry.

Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.


Social activity

Search articles by author

Spotlight

Advertisements