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Updated: Mar 1, 2026
Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Homocentric Chirality and Magnetism Enable Strong NIR Magneto-Optical Activity in a Chiral DyFe3 Cluster
Jia-Nan Chen1, Sheng Zhang2, Shu-Xian Hu2
1State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
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A single metal center that supports both the chirality and magnetism is a crucial design factor expected to achieve strong magneto-optical response, as it maximizes the coupling between magnetic and optical degrees of freedom. However, achieving such integration in molecular systems remains highly challenging. Here, we report a pair of chiral clusters, R/S-DyFe3, in which the magnetic DyIII ion simultaneously acts as the chiral and magnetic center within a propeller-like framework. Magneto-optical measurements reveal pronounced and fully reversible magnetic modulation circular dichroism (CD) signal of the NIR f-f transitions, with strong enhancement and clear signal inversion under ±1.6 T. Particularly, the field-dependent CD intensity corresponding to the 6H15/2 → 6F11/2 hypersensitive transition increases by approximately 40 times under an applied magnetic field compared to zero field. The exceptional responsiveness arises from Zeeman splitting and magnetic-field-induced mixing of 4f sublevels, which markedly amplify the magnetic circular dichroism (MCD) contribution within the overall CD signal. These findings provide the first chiral molecular demonstration of magnetic-field-controlled CD signal in a chiral cluster with structural centers that support both chirality and magnetism, offering crucial insights into designing chiroptical materials with magnetic field modulation.
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