Copper Lanthanide Phosphonate Cages: Highly Symmetric {Cu(3)Ln(9)P(6)} and {Cu(6)Ln(6)P(6)} Clusters with C-3v and D-3h Symmetry

Pineda EM, Heesing C, Tuna F, Zheng Y-Z, McInnes EJL, Schnack J, Winpenny REP (2015)
Inorganic Chemistry 54(13): 6331-6337.

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Abstract
Two families of copper lanthanide phosphonate clusters have been obtained through reaction of [Cu-2((O2CBu)-Bu-t)(4)((HO2CBu)-Bu-t)(2)] and either Ln(NO3)(3)center dot nH(2)O or [Ln(2)(O(2)C(t)nu)(6)((HO2CBu)-Bu-t)(6)} and tert-butylphosphonic acid or an amino-functionalized phosphonic acid. The clusters, with general formula [Cu(MeCN)(4)][Cu(3)Ln(9)(mu(3)-OH)(7)((O3PBu)-Bu-t)(6)((O2CBu)-Bu-t)(15)} and [Cu(6)Ln(6)(mu(3)-OH)(6)(O3PC(NH2)Me-2)(6)((O2CBu)-Bu-t)(12)}, were structurally characterized through single crystal X-ray diffraction and possess highly symmetric metal cores with approximately C-3v and D-3h point symmetry, respectively. We have investigated the possible application of the isotropic analogues in magnetic cooling, where we were able to observe that up to around 70% of the theoretical magnetic entropy change is obtained. Simulation of the magnetic data shows antiferromagnetic coupling between the spin centers, which explains the magnetic entropy value observed.
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Pineda EM, Heesing C, Tuna F, et al. Copper Lanthanide Phosphonate Cages: Highly Symmetric {Cu(3)Ln(9)P(6)} and {Cu(6)Ln(6)P(6)} Clusters with C-3v and D-3h Symmetry. Inorganic Chemistry. 2015;54(13):6331-6337.
Pineda, E. M., Heesing, C., Tuna, F., Zheng, Y. - Z., McInnes, E. J. L., Schnack, J., & Winpenny, R. E. P. (2015). Copper Lanthanide Phosphonate Cages: Highly Symmetric {Cu(3)Ln(9)P(6)} and {Cu(6)Ln(6)P(6)} Clusters with C-3v and D-3h Symmetry. Inorganic Chemistry, 54(13), 6331-6337.
Pineda, E. M., Heesing, C., Tuna, F., Zheng, Y. - Z., McInnes, E. J. L., Schnack, J., and Winpenny, R. E. P. (2015). Copper Lanthanide Phosphonate Cages: Highly Symmetric {Cu(3)Ln(9)P(6)} and {Cu(6)Ln(6)P(6)} Clusters with C-3v and D-3h Symmetry. Inorganic Chemistry 54, 6331-6337.
Pineda, E.M., et al., 2015. Copper Lanthanide Phosphonate Cages: Highly Symmetric {Cu(3)Ln(9)P(6)} and {Cu(6)Ln(6)P(6)} Clusters with C-3v and D-3h Symmetry. Inorganic Chemistry, 54(13), p 6331-6337.
E.M. Pineda, et al., “Copper Lanthanide Phosphonate Cages: Highly Symmetric {Cu(3)Ln(9)P(6)} and {Cu(6)Ln(6)P(6)} Clusters with C-3v and D-3h Symmetry”, Inorganic Chemistry, vol. 54, 2015, pp. 6331-6337.
Pineda, E.M., Heesing, C., Tuna, F., Zheng, Y.-Z., McInnes, E.J.L., Schnack, J., Winpenny, R.E.P.: Copper Lanthanide Phosphonate Cages: Highly Symmetric {Cu(3)Ln(9)P(6)} and {Cu(6)Ln(6)P(6)} Clusters with C-3v and D-3h Symmetry. Inorganic Chemistry. 54, 6331-6337 (2015).
Pineda, Eufemio Moreno, Heesing, Christian, Tuna, Floriana, Zheng, Yan-Zhen, McInnes, Eric J. L., Schnack, Jürgen, and Winpenny, Richard E. P. “Copper Lanthanide Phosphonate Cages: Highly Symmetric {Cu(3)Ln(9)P(6)} and {Cu(6)Ln(6)P(6)} Clusters with C-3v and D-3h Symmetry”. Inorganic Chemistry 54.13 (2015): 6331-6337.
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