Construction of Nitronyl Nitroxide‐Based 3d–4f Clusters: Structure and Magnetism

Abstract

Three unprecedented nitronyl nitroxide radical-bridged 3d-4f clusters, [Ln2 Cu2 (hfac)10 (NIT-3py)2 (H2 O)2 ](Ln(III) =Y, Gd, Dy), have been obtained from the self-assembly of Ln(hfac)3 , Cu(hfac)2 , and the radical ligand. The Dy complex shows a slow relaxation of magnetization, representing the first nitronyl nitroxide radical-based 3d-4f cluster with single-molecule magnet behavior.

Two-Dimensional Nitronyl Nitroxide–Cu Networks Based on Multi-Dentate Nitronyl Nitroxides: Structures and Magnetic Properties

“…The metal-radical heterospin strategy, in which metal ions link with stable organic radicals, is extremely fascinating for designing molecular magnetic materials [1][2][3][4][5][6]. Based on this kind of heterospin approach, 3d [7][8][9], 4f [10][11][12][13][14][15][16][17], and 3d-4f [18][19][20][21][22][23] compounds have been obtained so far by employing various organic radicals, such as N 2 3− [15,16], HAN 3− [24], TTF + [25], thiadiazoyl [14], and nitronyl nitroxide radical ligands [6,7,10,13,19,23,[26][27][28][29][30][31][32]. In particular, nitronyl nitroxide radicals are often used as building blocks to construct metal compounds with various topology structures due to the substituent groups of nitronyl nitroxides being able to effectively regulate the spatial arrangement of magnetic building blocks [33].…”

2p–3d–4f hetero-tri-spin molecule-based magnetic compounds

“…10 right). 37 The central core resulted from the coordination of the radical units to two Cu centers by the pyridine fragment and by one of its two NO units respectively; two The assemblage of 3-pyridine substituted nitronyl nitroxide with Ln(hfac) 3 and Cu(hfac) 2 yielded the discrete complexes [Ln 2 Cu 2 (hfac) 10 (Nit-3py) 2 (H 2 O) 2 ] (13, Ln = Y, Gd, Dy) characterized by a cyclic [Cu 2 Nit-3py 2 ] (Nit-3py = 2-(3-pyridyl)-4,4,5,5tetramethylimidazoline-1-oxyl-3-oxide) coordinating to two Ln(hfac) 3 units (Fig.…”

Analysis of the Magnetic Exchange Interactions in Yttrium(III) Complexes Containing Nitronyl Nitroxide Radicals

“…In these architectures, significant magnetic coupling can be observed that induces 0-, 1-, 2-or 3-dimensional overall magnetic behaviors. [25][26][27][28][29][30][31][32][33] Such materials can also give rise to unique magnetic behavior such as next-nearest neighbor interactions, 34 one-dimensional helimagnetism [35][36][37] or Single…”