A new family of boat-shaped Ln8 clusters exhibiting the magnetocaloric effect and slow magnetic relaxation

Jia-Nian Li; Ning-Fang Li; Ji-Lei Wang; Xiao-Mei Liu; Qing-Dong Ping; Ting-Ting Zang; Hua Mei; Yan Xu

doi:10.1039/d1dt02390j

A new family of boat-shaped Ln₈ clusters exhibiting the magnetocaloric effect and slow magnetic relaxation

Dalton Trans. 2021 Oct 12;50(39):13925-13931. doi: 10.1039/d1dt02390j.

Authors

Jia-Nian Li¹, Ning-Fang Li¹, Ji-Lei Wang¹, Xiao-Mei Liu¹, Qing-Dong Ping¹, Ting-Ting Zang¹, Hua Mei¹, Yan Xu^{1

2}

Affiliations

¹ College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211800, P. R. China. yanxu@njtech.edu.cn.
² State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, P. R. China.

PMID: 34528636
DOI: 10.1039/d1dt02390j

Abstract

Designing and synthesizing lanthanide clusters have always been a research hotspot. Herein, three lanthanide clusters with the formula [Ln₈(IN)₁₄(μ₃-OH)₈(μ₂-OH)₂(H₂O)₈]·xH₂O (Ln = 1-Gd and x = 11; Ln = 2-Dy and x = 8; Ln = 3-Eu and x = 8) have been isolated in the presence of isonicotinic acid under solvothermal conditions. Structural analysis indicates that those three compounds are isostructural, featuring boat-shaped {Ln₈} metal frameworks. Magnetic measurements reveal that 1-Gd exhibits a larger MCE with the maximum -ΔS_m value of 31.77 J kg^-1 K^-1 at 2 K for ΔH = 7 T, while 2-Dy displays slow magnetization relaxation. Besides, the photoluminescence properties of 3-Eu were investigated.