Synthesis, structure and slow magnetic relaxation of Ce(III) phenylacetate complex

• Published in: Polyhedron 2023-05, Vol.236, p.116368, Article 116368
• Main Authors: Krešáková, Lenka, Doroshenko, Anastasiia, Tarasenko, Róbert, Rohlíček, Jan, Orendáč, Martin, Černák, Juraj
• Format: Article
• Language: English
• Subjects: Ce(III) complex; Crystal structure; O-donor ligand; Rietveld method; Slow magnetic relaxation
• ISSN: 0277-5387
• DOI: 10.1016/j.poly.2023.116368

Chain-like crystal structure of phenylacetato complex of Ce(III) elucidated by Rietveld method. Nona-coordinated Ce(III) ion (O9 donor set) of muffin shape polyhedron. Field induced slow magnetic relaxation with direct and Raman relaxation processes. [Display omitted] [Ce(PAA)3(H2O)]n complex (1) (HPAA is phenylacetic acid) was synthesised and studied. The crystal structure of 1 was elucidated by the Rietveld method. Its crystal structure is polymeric and is built up of Ce(III) ions interconnected by bridging PAA− ligands. The Ce(III) ions in 1 are nona-coordinated by eight carboxylate oxygen atoms from six PAA− ligands, and one aqua ligand completes the coordination sphere yielding O8O donor set. The studied material displays field-induced slow magnetic relaxation. Temperature dependence of the relaxation time suggests the existence of direct and Raman relaxation processes. Similarly, as for the other Ce(III) complexes, the existence of Orbach process may be questioned due to the large discrepancy between the value of the energy gap obtained from static and dynamic measurements.