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Magnetic behavior of the novel pentagonal-bipyramidal erbium(III) complex (Et3NH)[Er(H2DAPS)Cl2]: high-frequency EPR study and crystal-field analysis

We report the synthesis, crystal structure and magnetic properties of the new heptacoordinated mononuclear erbium(III) complex (Et3NH)[Er(H2DAPS)Cl2] (H4DAPS = 2,6-diacetylpyridine bis-(salicylhydrazone)) (1). The coordination polyhedron around the Er(III) ion features a slightly distorted pentagona...

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Main Authors: Spillecke, Lena (Author) , Koo, Changhyun (Author) , Maximova, Olga (Author) , Mironov, Vladimir S. (Author) , Kopotkov, Vycheslav A. (Author) , Korchagin, Denis V. (Author) , Vasiliev, Alexander N. (Author) , Yagubskii, Eduard B. (Author) , Klingeler, Rüdiger (Author)
Format: Article (Journal)
Language:English
Published: 23 Nov 2021
In: Dalton transactions
Year: 2021, Volume: 50, Issue: 48, Pages: 18143-18154
ISSN:1477-9234
DOI:10.1039/D1DT03228C
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1039/D1DT03228C
Verlag, lizenzpflichtig, Volltext: https://pubs.rsc.org/en/content/articlelanding/2021/dt/d1dt03228c
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Author Notes:Lena Spillecke, Changhyun Koo, Olga Maximova, Vladimir S. Mironov, Vycheslav A. Kopotkov, Denis V. Korchagin, Alexander N. Vasiliev, Eduard B. Yagubskii and Rüdiger Klingeler
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Summary:We report the synthesis, crystal structure and magnetic properties of the new heptacoordinated mononuclear erbium(III) complex (Et3NH)[Er(H2DAPS)Cl2] (H4DAPS = 2,6-diacetylpyridine bis-(salicylhydrazone)) (1). The coordination polyhedron around the Er(III) ion features a slightly distorted pentagonal bipyramid formed by the pentagonal N3O2 chelate ring of the H2DAPS ligand in the equatorial plane and two apical chloride ligands. Detailed high-frequency/high-field electron paramagnetic resonance (HF-EPR) studies of 1 result in the precise determination of the crystal field (CF) splitting energies (0, 290 and 460 GHz) and effective g-values of the three lowest Kramers doublets (KDs) of the Er(III) ion. The obtained HF-EPR data are in good agreement with the results from CF analysis for the Er(III) ion based on the simulation of the dc magnetic data of 1. The results from dynamic susceptibility measurements indicate that there is no slow relaxation of magnetisation behaviour. This observation is discussed in terms of the electronic structure of 1 obtained from experimental and theoretical results.
Item Description:Im Titel sind die Zahlen "3" und "2" tiefgestellt
Gesehen am 18.07.2022
Physical Description:Online Resource
ISSN:1477-9234
DOI:10.1039/D1DT03228C

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