Alhassanat, A. and Voelker, L. and Gamer, C. and Rauguth, A. and Kredel, A. and Luo, C. and Radu, F. and Sapozhnik, A. A. and Mashoff, T. and Rentschler, E. and Elmers, H. J. (2019) Solvent-induced high-spin transition in double-decker 3d-4f metallacrowns. PHYSICAL REVIEW B, 99 (10): 104404. ISSN 2469-9950, 2469-9969
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Element-specific magnetic spin and orbital magnetic moments of 3d-4f double-decker metallacrown molecules have been investigated using x-ray magnetic circular dichroism. The double-decker metallacrowns comprise one rare-earth Gd(III) or Tb(III) ion embedded between two squared scaffolds of four Ni(II) ions. We observe a strong increase of the Ni(II) moments if the molecules are dissolved in methanol, indicating a spin crossover from a low-spin to a high-spin state. In contrast, dichloromethane does not change the spin state. This result is explained by a change of the coordination environment of nickel. The comparison of charge-transfer multiplet calculations with the experimental absorption spectra confirm the different ligand fields.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SINGLE-MOLECULE MAGNET; RAY CIRCULAR-DICHROISM; CROSSOVER; MAGNETIZATION; BEHAVIOR; BISTABILITY; ANISOTROPY; RELAXATION; COMPLEXES; DYNAMICS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Apr 2020 13:22 |
| Last Modified: | 15 Apr 2020 13:22 |
| URI: | https://pred.uni-regensburg.de/id/eprint/27385 |
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