A new family of heterometallic [Cu6M4] (M = Gd, Tb, Dy and Y) clusters derived from the combined use of selected pyridyl poly-alcohol ligands†

IF 4.3 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC ACS Applied Electronic Materials Pub Date : 2024-09-10 DOI:10.1039/D4DT02054E

Antonis Anastassiades, Dimitris I. Alexandropoulos, Christian D. Buch, Stergios Piligkos and Anastasios J. Tasiopoulos

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Abstract

The combined use of 2-(2-pyridyl)-1,3-propane-diol (pypdH₂) and 2-hydroxymethyl-2-(2-pyridyl)-1,3-propane-diol (pyptH₃) in Cu²⁺/4f chemistry has afforded a new family of isostructural [Cu₆M₄(pypt)₄(pypdH)₄(NO₃)₈] [M = Gd (1), Tb (2), Dy (3), and Y (4)] complexes. These compounds are based on an unprecedented three-layered symmetric [Cu₆M₄(μ-OR)₁₆]⁸⁺ structural core, formed from the connection of the metal ions by bridging alkoxide arms of the organic ligands. Direct current magnetic susceptibility studies for complexes 1–3 revealed the presence of dominant ferromagnetic exchange interactions, suggesting the existence of large spin ground state values. Alternating current magnetic studies indicate the presence of slow-magnetic relaxation in 1–3.

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结合使用精选的吡啶基多元醇配体衍生出的新型杂金属 [Cu6M4]（M = Gd、Tb、Dy 和 Y）簇群家族

在 Cu2+/4f 化学中结合使用 2-(2-吡啶基)-1,3-丙二醇（pypdH2）和 2-羟甲基-2-(2-吡啶基)-1,3-丙二醇（pyptH3），产生了一系列新的等结构[Cu6M4(pypt)4(pypdH)4(NO3)8] [M = Gd (1)、Tb (2)、Dy (3) 和 Y (4)]配合物。这些化合物基于前所未有的三层对称 [Cu6M4(μ-ΟR)16]8+结构核心，由有机配体的烷氧基桥臂连接金属离子而形成。对复合物 1 - 3 进行的直流磁感应强度研究表明，铁磁交换相互作用占主导地位，表明存在较大的自旋基态值。交流磁研究表明，1-3 复合物中存在慢磁弛豫。

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