Terbium Triangle Bridged by a Triazole Nitronyl Nitroxide Radical with Single-Molecule-Magnet Behavior

Slow magnetic relaxation in a Dy3 triangle and a bistriangular Dy6 cluster

“…Specifically, the toroidal moment, responsible for single-molecule toroics (SMTs), has been found in certain Dy III 3 triangles, which show SMM behavior even in an almost diamagnetic ground state. [18][19][20][21][22][23][24][25][26][27][28][29][30] This discovery has sparked particular attention in the construction of other polynuclear lanthanide clusters, such as Dy 3 , 22,24,[31][32][33][34][35][36][37] Dy 4 , 27,30,[38][39][40] Dy 5 [41][42][43][44][45][46] and Dy 6 . 28,32,47,48 It should be mentioned that besides the high symmetry of Ln III ions, complex factors such as the intermetallic magnetic interactions, inherent anisotropies and the spatial arrangement of the local Ln III ions within the polynuclear systems play a vital role in realizing good SMM performance.…”

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

“…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]. However, it is worth noting that most of the nitronyl nitroxide-metal compounds display zero- [34][35][36][37] and one-dimensional (1D) structures [10,11,26,27], while nitronyl nitroxide radicals bridged two-dimensional (2D) metal complexes are scarce so far. This could be attributed to the fact that metal centers require electron-attracting coligands, such as hexafluoroacetylacetonate, to promote the coordination of nitronyl nitroxide radicals.…”

Tuning Nuclearity of Biradical-Ln Functional Compounds with Single-Molecule Magnet Behavior and Near-Infrared Luminescence

“…Fitting χ″(ν) plots of 2 -{Dy 2 } with the general Debye model acquires relaxation time factor ( τ ) and dispersion of distribution: α = 0.289–0.370. For 2 , fitting linear ln τ versus T –1 plot was realized with Orbach processes [ τ = τ 0 exp­(Δ/ k B T )], giving Δ / k B = 9.0(8) K and τ 0 = 2.1(0) × 10 –6 s (within the range of 4f-SMMs: 10 –5 to 10 –12 s) − (Figure , left).…”