1. Opening magnetic hysteresis via improving the planarity of equatorial coordination by hydrogen bonding.
- Author
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Qu, Yun-Xia, Ruan, Ze-Yu, Lyu, Bang-Heng, Chen, Yan-Cong, Huang, Guo-Zhang, Liu, Jun-Liang, and Tong, Ming-Liang
- Subjects
MAGNETIC hysteresis ,HYDROGEN bonding ,CHEMICAL bond lengths ,BOND angles ,HYSTERESIS loop ,COORDINATION polymers - Abstract
Through a mixed-ligand strategy, the structural change from a discrete dinuclear Dy
III cluster to a one-dimensional polymeric chain was achieved, maintaining the two magnetic entities with the same {Dy(dppbO2 )2 (H2 O)5 } (dppbO2 = 1,4-butylenebis(diphenylphosphine oxide)) core structure. Since the hydrogen bonding between the equatorial coordinated water molecules and the guests/solvents/anions is distinct, the local geometry and the equatorial planarity of the first coordination sphere of the central DyIII ion become slightly different caused by the second coordination sphere. As a result, the dinuclear compound shows typical butterfly-shaped hysteresis loops, while it significantly opens at zero magnetic field up to 11 K for the 1D polymer, which is unprecedented in coordination polymers. Our experimental observations and theoretical analysis indicate that the hydrogen bonding leads to the fine-tuning of certain bond lengths and angles of the coordination environment, as well as the crystal field to a certain extent, revealing that the second coordination sphere affects the first coordination sphere by hydrogen bonding. [ABSTRACT FROM AUTHOR]- Published
- 2022
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