Mn(II)2Gd(III)3 Phosphonate as a Molecular Refrigerant
Xiaoyan Tang A , Ye Xu A , Wenpeng Ye A , Yan Tang A , Yunsheng Ma A B and Rongxin Yuan A B
+ Author Affiliations
- Author Affiliations
A Jiangsu Key Laboratory of Advanced Functional Materials, School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, 215500, China.
B Corresponding authors. Email: myschem@hotmail.com; yuanrx@cslg.edu.cn
Australian Journal of Chemistry 68(12) 1926-1928 https://doi.org/10.1071/CH15520
Submitted: 24 August 2015 Accepted: 17 September 2015 Published: 13 October 2015
Abstract
3d-Gd phosphonate clusters are attractive for their potential applications as magnetic coolers. A new pentanuclear cluster [Mn(II)2Gd(III)3(OH)(dtbmfPO3)2(tBuCO2)8(HO2CtBu)(H2O)2]·HO2CtBu·CH3CN (1) (dtbmfPO3H2 = (2,7-di-tert-butyl-9-methyl-9H-fluoren-9-yl)phosphonic acid) has been synthesised and characterised. The cluster has a planar structure in which the trinuclear {MnGd2(OH)} and dinuclear {MnGdO2} units are joined together by two phosphonate groups. The magnetic studies reveal that 1 shows antiferromagnetic interactions and a large magnetocaloric effect (ΔS = 20.9 J kg–1 K–1 at ΔH = 7 T).
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