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Single‐Molecule Magnet and Magnetothermal Properties of Two‐Dimensional Polymers Containing Heterometallic [Cu5Ln2] (Ln = GdIII and DyIII) Motifs
European Journal of Inorganic Chemistry ( IF 2.2 ) Pub Date : 2018-03-23 , DOI: 10.1002/ejic.201701429
Atanu Dey 1, 2 , Sourav Das 1, 3 , María A. Palacios 4 , Enrique Colacio 4 , Vadapalli Chandrasekhar 1, 2
Affiliation  

The reaction of a compartmental ligand N,N′‐bis(3‐methoxysalicylidene)‐1,3‐diamino‐2‐propanol (LH3) with CuII and LnIII salts under solvothermal conditions afforded two‐dimensional coordination polymers, [{Cu5Gd2(L)23‐OH)4(NO3)4(µ‐OH2)2}(NO3)2] (1) and [{Cu5Dy2(L)23‐OH)4(NO3)4(MeOH)2}(NO3)2] (2). A detailed study of the magnetic properties of the two coordination polymers reveals that the [Cu5Dy2] analogue shows single‐molecule magnet (SMM) behavior with an energy barrier of about 12 K with τ0 = 10–6 s under zero‐dc field, while the [Cu5Gd2] analogue shows magnetocaloric effect with a –ΔSm value of 17.55 J kg–1 K–1 at T = 2 K (ΔB = 5 T). Interestingly, the magnetic and SMM properties of the previously reported molecular and one‐dimensional analogues containing the [Cu5Ln2] motif are preserved even in the two‐dimensional coordination networks.

中文翻译:

含杂金属[Cu5Ln2](Ln = GdIII和DyIII)基元的二维聚合物的单分子磁体和磁热性质

在溶剂热条件下,隔室配体NN'-双(3-甲氧基水杨基)-1,3-二氨基-2-丙醇(LH 3)与Cu II和Ln III盐的反应得到了二维配位聚合物,[{ Cu 5 Gd 2(L)2(µ 3 -OH)4(NO 34(µ‐OH 22 }(NO 32 ] 1)和[{Cu 5 Dy 2(L)2( µ 3 -OH)4(NO 34(MeOH)2 }(NO 32 ] 2)。两个配位聚合物的磁特性的详细研究表明,[铜5的Dy 2 ]示出了模拟的单分子磁体(SMM)具有约12 K的能量势垒行为τ 0 = 10 -6下零š直流磁场,而[Cu 5 Gd 2 ]类似物在T时的–Δ S m值为17.55 J kg –1  K –1时表现出磁热效应= 2 K(Δ= 5 T)。有趣的是,即使在二维配位网络中,仍保留了先前报道的含有[Cu 5 Ln 2 ]基序的分子和一维类似物的磁性和SMM特性。
更新日期:2018-03-23
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