Stepwise investigation of the influences of steric groups versus counter ions to target Cu/Dy complexes

Kuehne, Irina A, Griffiths, Kieran, Hutchings, Amy-Jayne, Townrow, Oliver P E, Eichhoeffer, Andreas, Anson, Christopher E, Kostakis, George E and Powell, Annie K (2017) Stepwise investigation of the influences of steric groups versus counter ions to target Cu/Dy complexes. Crystal Growth & Design, 17 (10). pp. 5178-5190. ISSN 1528-7483

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From an investigation of varying the steric bulk of a flexible ligand, we have produced a family of structures using similar reaction conditions. Even small changes from a hydrogen atom to a methyl to an ethyl group on the ligand influences the structural outcome, which can also be steered by the nature of the metal source. We employed Schiff base ligands by combining o-vanillin and three different 2-amino-1,3-propandiol units, leading to H3L1 (R=hydrogen), H3L2 (R=methyl) and H3L3 (R=ethyl). The differing nuclearities of the three clusters, 1 to 3, originate mainly from the steric influence, while this effect is not seen in complex 4 to 6, where the general butterfly motif is maintained. We present here the synthesis, crystal structures and magnetic properties of six new CuII-LnIII complexes, providing valuable insight into future synthetic directions. The topological part includes a table of all CuII-DyIII complexes with nuclearities higher than four and their topological motif. The investigation of the magnetic behaviors reveal that all six complexes show frequency dependent signals in the out-of phase ac susceptibility, which is indicative for SMM behavior.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science > QD Chemistry > QD0146 Inorganic chemistry
Depositing User: Georgios Kostakis
Date Deposited: 24 Jul 2017 16:46
Last Modified: 19 Jul 2019 14:00

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