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Four New Families of Polynuclear Zn-Ln Coordination Clusters. Synthetic, Topological, Magnetic, and Luminescent Aspects

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  • Kieran Griffiths
  • Julia Mayans
  • Michael A. Shipman
  • Graham J. Tizzard
  • Simon J. Coles
  • Barry A. Blight
  • Albert Escuer
  • George E. Kostakis
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<mark>Journal publication date</mark>5/04/2017
<mark>Journal</mark>Crystal Growth and Design
Issue number4
Volume17
Number of pages15
Pages (from-to)1524-1538
Publication StatusPublished
<mark>Original language</mark>English

Abstract

The employment of three structurally related Schiff bases H2L1, H2L2, and H3L3 with zinc and lanthanide salts under various reaction conditions, gave four families of compounds formulated as [ZnII2LnIII2(L1)4(EtOH)6][ClO4]2 (1-3), [ZnII5Ln(OH)(L1)6(H2O)] (4-6), [ZnII4LnIII2(OH)2(L2)4 (OAc)2(NO3)2(DMF)3]·DMF (7-9), and [ZnII2LnIII2(L3)2(NO3)2(CO3)2(CH3OH)2] (10-12) with robust and novel topologies. Synthetic aspects are discussed. A comprehensive topological analysis of all reported ZnII/LnIII CCs with a core nuclearity of four and above is presented and identifies that families (4-6) and (7-9) are the first examples of the 2,3,4M6-1 motif in ZnII/LnIII chemistry. Magnetic studies are presented for the DyIII analogues (1, 7, and 10) are presented, 7 demonstrates field-induced slow relaxation of the magnetization. Fluorescence studies are also discussed.