The relevance of non-axiality and low-lying excited states for slow magnetic relaxation in pentagonal-bipyramidal erbium(III) complexes probed by high-frequency EPR
High-frequency/high-field electron paramagnetic resonance studies on a series of seven-coordinate pentagonal-bipyramidal (PBP) erbium(III) complexes Er(DAPMBH/H2DAPS)X (H2DAPMBH = 2,6-diacetylpyridine bis-4-methoxy benzoylhydrazone, H4DAPS = 2,6-diacetylpyridine bis-(salicylhydrazone)) demonstrate t...
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| Main Authors: | , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
29 April 2025
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| In: |
Chemistry - a European journal
Year: 2025, Volume: 31, Issue: 33, Pages: 1-8 |
| ISSN: | 1521-3765 |
| DOI: | 10.1002/chem.202500369 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1002/chem.202500369 Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/chem.202500369 
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| Author Notes: | Jan Arneth, Lena Spillecke, Changyun Koo, Tamara A. Bazhenova, Eduard B. Yagubskii, and Rüdiger Klingeler |
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| 245 | 1 | 4 | |a The relevance of non-axiality and low-lying excited states for slow magnetic relaxation in pentagonal-bipyramidal erbium(III) complexes probed by high-frequency EPR |c Jan Arneth, Lena Spillecke, Changyun Koo, Tamara A. Bazhenova, Eduard B. Yagubskii, and Rüdiger Klingeler |
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| 520 | |a High-frequency/high-field electron paramagnetic resonance studies on a series of seven-coordinate pentagonal-bipyramidal (PBP) erbium(III) complexes Er(DAPMBH/H2DAPS)X (H2DAPMBH = 2,6-diacetylpyridine bis-4-methoxy benzoylhydrazone, H4DAPS = 2,6-diacetylpyridine bis-(salicylhydrazone)) demonstrate the effects of different apical ligands (X = (H2O)Cl (1), (CH3OH)N3 (2), Cl2 (3)) on the local magnetic anisotropy of the central ErIII ions. In particular, we report direct experimental determination of the effective g-values and zero field splittings of the energetically low-lying Kramers doublets. Our quantitative determination of the magnetic anisotropy highlights the relevance of an axial g-tensor for SMM behavior and suggests that fast magnetic relaxation is mainly driven by a thermally assisted quantum tunnelling process via low-lying excited states. | ||
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| 650 | 4 | |a lanthanides | |
| 650 | 4 | |a magnetic anisotropy | |
| 650 | 4 | |a magnetic properties | |
| 650 | 4 | |a relaxation mechanisms | |
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