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- Title
Selective Stabilization of the Spin States of a Magnetically Anisotropic Dysprosium Ion Induced by Photo-Excitation of the Associated Cyclic π-Conjugated System.
- Authors
Fukuda, Takamitsu; Ozawa, Hideaki; Sakaguchi, Yutaro; Kizaki, Kazuro; Kobayashi, Toshiya; Fuyuhiro, Akira; Ishikawa, Naoto
- Abstract
The presence of a new electronic interaction, which couples a 4 f-electronic system with a total angular momentum J and a photoexcited cyclic π-conjugated system with an orbital angular momentum L, in the bis(phthalocyaninato)dysprosium single-molecule magnet ([DyPc2]−) is reported. Two π-π* excited states in the visible spectral region of the [DyPc2]− complex, which are denoted here as QL and QH, showed significantly different temperature and field dependences of the magnetic circular dichroism (MCD) A-term intensity. This phenomenon not only indicates the presence of a ' J- L' interaction, but also that the interaction generates two different preferred orientations of the J- L pair, either parallel (for the QH band) or antiparallel (for the QL band), depending on the excitation energy. We have constructed a theoretical model that reproduces the temperature and field dependences, and quantitatively evaluated the J- L interaction.
- Subjects
ELECTRON spin states; MAGNETIC anisotropy; DYSPROSIUM compounds; METAL ions; CONJUGATED systems; PHOTOEXCITATION
- Publication
Chemistry - A European Journal, 2017, Vol 23, Issue 64, p16357
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201703588