Functionalized Trigonal Lanthanide Complexes: A New Family of 4f Single-Ion Magnets
Functionalized Trigonal Lanthanide Complexes: A New Family of 4f Single-Ion Magnets
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DOI：
10.1021/acs.inorgchem.0c02121
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发表时间：
2020-11-16
影响因子：
4.6
通讯作者：
Piligkos, Stergios
中科院分区：
文献类型：
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作者：
Buch, Christian D.;Hansen, Steen H.;Piligkos, Stergios
报道了8个中性功能化的三元稀土配合物LnL（Ln = Gd（1），Tb（2），Dy（3），Ho（4），Er（5），Tm（6），Yb（7），Lu（8））的合成、表征和磁性。这些是通过一锅合成法制备的，其中首先，通过三（2-氨乙基）胺与2，6-二甲酰基-对甲酚的希夫碱反应原位合成配体H3 L。在加入Ln（OTf）（3）中心点xH（2）O和碱之后，得到LnL。粉末X-射线衍射证实所有配合物是同构的。LnL含有侧基、非配位羰基官能团，其是反应性的并且代表与适当官能化表面的直接锚定点。此外，这些反应性羰基官能团可用于后官能化LnL：例如，与芳香族π系统。本文介绍了7与苄胺的Schiff碱缩合反应，得到9，以及9的表征和磁性。我们的研究确定LnL是一种真正多功能的模块，用于Ln基单离子磁体的表面沉积。
We report the synthesis, characterization, and magnetic properties of eight neutral functionalized trigonal lanthanide coordination complexes LnL with Ln = Gd (1), Tb (2), Dy (3), Ho (4), Er (5), Tm (6), Yb (7), Lu (8). These were prepared through a one-pot synthesis where, first, the ligand H3L was synthesized in situ through a Schiff base reaction of tris(2-aminoethyl)amine with 2,6-diformyl-p-cresol. Following addition of Ln(OTf)(3)center dot xH(2)O and base, LnL was obtained. Powder X-ray diffraction confirms that all complexes are isostructural. LnL contain pendant, noncoordinating carbonyl functions that are reactive and represent direct anchoring points to appropriately functionalized surfaces. Furthermore, these reactive carbonyl functions can be used to postfunctionalize LnL: for example, with aromatic pi systems. We present herein the Schiff base condensation of 7 with benzylamine to yield 9 as well as the characterization and magnetic properties of 9. Our study establishes LnL as a truly versatile module for the surface deposition of Ln-based single-ion magnets.