A Tetranuclear Dysprosium Schiff Base Complex Showing Slow Relaxation of Magnetization
Mamo Gebrezgiabher,
Sören Schlittenhardt,
Cyril Rajnák,
Assefa Sergawie,
Mario Ruben,
Madhu Thomas,
Roman Boča
Affiliations
Mamo Gebrezgiabher
Department of Industrial Chemistry, College of Applied Sciences and Nanotechnology Excellence Center, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
Sören Schlittenhardt
Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 6344 Karlsruhe, Germany
Cyril Rajnák
Department of Chemistry, Faculty of Natural Sciences, University of SS Cyril and Methodius, 91701 Trnava, Slovakia
Assefa Sergawie
Department of Industrial Chemistry, College of Applied Sciences and Nanotechnology Excellence Center, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
Mario Ruben
Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 6344 Karlsruhe, Germany
Madhu Thomas
Department of Industrial Chemistry, College of Applied Sciences and Nanotechnology Excellence Center, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
Roman Boča
Department of Chemistry, Faculty of Natural Sciences, University of SS Cyril and Methodius, 91701 Trnava, Slovakia
A tetranuclear dysprosium Schiff base complex was isolated by reacting dysprosium chloride with 2-hydroxy-3-methoxybenzaldehyde and 2-(aminomethyl)pyridine in-situ under basic conditions. The isolated Dy(III) complex was characterized by elemental analyses, single crystal X-ray diffraction and molecular spectroscopy. The complex crystallizes in the triclinic space group P-1 with unit cell parameters of a = 10.2003 (4), b = 13.8602 (5), c = 14.9542 (6), α = 94.523 (3), β = 109.362 (4), and γ = 99.861 (3). The magnetic properties of 1 have been investigated by DC and AC susceptibility measurements. The DC measurements reveal weak exchange coupling of antiferromagnetic nature. In the AC measurement, the complex shows a slow relaxation of magnetization in the absence of an external magnetic field.