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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
A Cyclic {NiII 8DyIII 4} Cluster Where the DyIII Moments Are Organized by the Transition Metal Spins
Imon J Dutta1, Kartik Chandra Mondal2,3, Jonas Braun3,4,5
1Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Mohali, Punjab, India.
Abstract:
A series of [Ni8Ln4(CO3)4(L)8(NO3)2(H2O)8 (MeOH)4](NO3)2 (Ln = Dy (1), Gd (2), Y (3)) cyclic coordination clusters containing four carbonate bridges were isolated and studied using SQUID and microSQUID experiments and quantum mechanical calculations. The dodecanuclear Ni8Dy4 complex exhibits slow relaxation of the magnetization confirmed by the presence of temperature- and field-dependent magnetic hysteresis loops. The competing interactions and the anisotropic nature within the cluster were analyzed using DFT and ab initio calculations and revealed that the spin structure of the DyIII ions is steered by the interactions mediated through the NiII ions.
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