Magneto-optical Properties of Chiral Co2Ln and Co3Ln2 (Ln = Dy and Er) Clusters

Mukeremu Aibibula; Yu-Hong Song; Han Xu; Man-Ting Chen; Xiang-Jian Kong; La-Sheng Long; Lan-Sun Zheng

doi:10.1021/acs.inorgchem.4c00546

Magneto-optical Properties of Chiral Co₂Ln and Co₃Ln₂ (Ln = Dy and Er) Clusters

Inorg Chem. 2024 May 6;63(18):8003-8007. doi: 10.1021/acs.inorgchem.4c00546. Epub 2024 Apr 22.

Authors

Mukeremu Aibibula¹, Yu-Hong Song¹, Han Xu¹, Man-Ting Chen¹, Xiang-Jian Kong^{1

2}, La-Sheng Long¹, Lan-Sun Zheng¹

Affiliations

¹ State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
² Fujian Key Laboratory of Rare-earth Functional Materials, Fujian Shanhai Collaborative Innovation Center of Rare-earth Functional Materials, Longyan 366300, China.

PMID: 38647013
DOI: 10.1021/acs.inorgchem.4c00546

Abstract

A series of chiral heterometallic Ln-Co clusters, denoted as Co₂Ln and Co₃Ln₂ (Ln = Dy and Er), were synthesized by reacting the chiral chelating ligand (R/S)-2-(1-hydroxyethyl)pyridine (Hmpm), CoAc₂·4H₂O, and Ln(NO₃)₃·6H₂O. Co₂Ln and Co₃Ln₂ exhibit perfect mirror images in circular dichroism within the 320-700 nm range. Notably, the Co₂Er and Co₃Er₂ clusters display pronounced magnetic circular dichroism (MCD) responses of the hypersensitive f-f transitions ⁴I_15/2-⁴G_11/2 at 375 nm and ⁴I_15/2-²H_11/2 at 520 nm of Er^III ions. This study highlights the strong magneto-optical activity associated with hypersensitive f-f transitions in chiral 3d-4f magnetic clusters.