Facile and environmentally friendly synthesis of six heterometallic dumbbell-shaped MII5LnIII4 (M = Co, Ni; Ln = Eu, Gd, Dy) clusters as cryogenic magnetic coolants and molecular magnets

Feng Shao; Jia-Jia Zhuang; Ming-Guang Chen; Ning Wang; Hai-Yan Shi; Jia-Ping Tong; Gang Luo; Jun Tao; Lan-Sun Zheng

doi:10.1039/C8DT04153A

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Facile and environmentally friendly synthesis of six heterometallic dumbbell-shaped M ^II₅Ln ^III₄ (M = Co, Ni; Ln = Eu, Gd, Dy) clusters as cryogenic magnetic coolants and molecular magnets†

Feng Shao,

^a Jia-Jia Zhuang,^b Ming-Guang Chen,^c Ning Wang,^d Hai-Yan Shi,^a Jia-Ping Tong,

*^ab Gang Luo,^b Jun Tao

^a and Lan-Sun Zheng^a

Author affiliations

* Corresponding authors

^a State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
E-mail: jiapingtong@hotmail.com

^b Lab of Chemical Materials and Devices, Training Base of Army Logistics University of PLA, Xiangyang 441000, P.R. China

^c Baotou Research Institute of Rare Earths, Baotou 014040, PR China

^d Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences 1068 Xueyuan Avenue, Shenzhen University Town, Shenzhen 518000, PR China

Abstract

Six analogous dumbbell-shaped 3d–4f complexes M^II₅Ln^III₄ were obtained by the reaction of Ln(NO₃)₃ (Ln = Eu, Gd, Dy) and M(OAc)₂ (M = Co, Ni) without any other organic ligands, and M₅Gd₄ exhibited a large magnetocaloric effect (−ΔS_m = 31.0, 37.3 J kg⁻¹ K⁻¹ for Co₅Gd₄ and Ni₅Gd₄ respectively), while M₅Dy₄ and Co₅Eu₄ showed single molecule magnet behaviour. To the best of our knowledge, Co₅Eu₄ is the first Eu-based cluster to display single molecule magnet behaviour (U_eff = 16.4 K).

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Article information

DOI: https://doi.org/10.1039/C8DT04153A
Article type: Communication
Submitted: 17 Oct 2018
Accepted: 14 Nov 2018
First published: 19 Nov 2018

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Dalton Trans., 2018,47, 16850-16854

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Facile and environmentally friendly synthesis of six heterometallic dumbbell-shaped M^II₅Ln^III₄ (M = Co, Ni; Ln = Eu, Gd, Dy) clusters as cryogenic magnetic coolants and molecular magnets

F. Shao, J. Zhuang, M. Chen, N. Wang, H. Shi, J. Tong, G. Luo, J. Tao and L. Zheng, Dalton Trans., 2018, 47, 16850 DOI: 10.1039/C8DT04153A

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