Table 1. Comparison of Dy(iii)-SIM with some mononuclear 4f, polynuclear 4f and 3d–4f-based SMMs d .
| Complex | U eff/K | ZFC maxima (TB)/K | Hysteresis |
Coercivity/T | Ambient air stability | Ref. | |
| T/K | T s–1 | ||||||
| 1 | 651.0, 735.4 c | 12 | 12 a | 0.0018 | ∼0.9 (1.8 K) | Yes | This work |
| 30 b | 0.02 | ∼1.5 (2.0 K) | |||||
| [Dy(BIPMTMS)2][K(18C6)(THF)2] | 721, 813 | 10 | 16 | 0.0035 | <0.7 (1.8 K) | No | 3g |
| <0.8 (1.8 K) c | |||||||
| (Cp*)Er(COT) | 323, 197 | 5 c | 5.0 | 0.000916 | ∼0 (1.8 K) | No | 2a |
| ∼0.01 (1.8 K) c | |||||||
| (Cp*)Er(COT) | 323, 197 | — | — | 0.07 c | 1.3 (1.6 K) c | No | 2b |
| Er[N(SiMe3)2]3 | 122 | — | 1.9 | — | ∼0 | No | 10d |
| [Li(DME)3][ErIII(COT′′)2] | 187 | — | 8.0 | 0.0022 | 0.6250 (1.8 K) | No | 1f |
| [Er(COT)2]– | 286 | — | 12 | 0.0035 | 0.7 (1.8 K) | No | 3a |
| [Er(COT)2]– | 211.5 | 10 c | 10 | 0.00078 | 0.7 (1.8) | No | 15 |
| 1.1 (1.8 K) c | |||||||
| [Li(THF)4[Er{N(SiMe3)2}3Cl]·2THF | 63.3 | — | 3 c | 0.00346 | <0.02 (1.8 K) c | No | 3b |
| [Pc2Tb]TBA | 331 | — | — | — | — | No | 5 |
| [TbPc2]/[TBA][Br] | 922 c | — | — | — | — | No | 16 |
| [TBA][Tb{Pc(phth3)}2] | 666.2 | 2.0 | 0.01666 | <0.03 (2.0 K) | No | 17 | |
| [TbPc2] | 590 | — | — | — | — | No | 18 |
| [Tb{Pc(OEt)8}2][SbCl6] | 791 | — | — | — | — | No | 19 |
| [TBA][Tb{Pc(OEt)8}2] | 732 | — | — | — | — | No | 19 |
| [Tb{Pc(S-DOP)8}2] | 690 | — | — | — | — | No | 20 |
| [Tb(Pc)(Pc′)]– | 938 | — | — | — | — | No | 1d |
| [(Cp′2Dy){μ-P(H)Mes}]3 | 302, 368 c | — | 4.4 c | 0.0026 c | ∼0.03 (1.8 K) c | No | 21 |
| [K(18C6)]{[(Me3Si)2N]2(THF)Dy}2(μ-η2:η2-N2) | 177 | 8.3 | 8.3 | 0.08 | ∼1.5 (2–6 K) | No | 1b |
| [Dy4K2O(OtBu)12]·C6H14 | 692, 316 | — | 5.0 | 0.14 | <0.15 (0.03 K) | No | 1a |
| 842 c | 6.0 c | ∼0.25 (0.03 K) c | |||||
| [Dy5(μ5-O)(μ3-OiPr)4(μ-OiPr)4(OiPr)5] | 528 | — | 1.85 | — | — | No | 1a, 6a |
| 804 c | 7 c | 0.001 c | ∼0 c | ||||
| [[K(18C6)(THF)2][{[(Me3Si)2N]2(THF)Tb}2(μ-η2:η2-N2)] | 326 | 14 | 14 | 0.0009 | <5.0 (11 K) | No | 1c |
| [(η5-Cp)2Dy(μ-bpym)]2[BPh4] | 127 | 6.5 | 6.5 | 0.002 | ∼0.6 (3 K) | No | 2d |
| [Dy(hfac)3(μ-pyNO)]2 | 167 | — | 1.4 | 0.02 | ∼0.0121 (1.4 K) | Yes | 22 |
| {[Cp′2Dy(μ-SSiPh3)]2 | 192 | — | 1.8 | — | ∼0 | No | 23 |
| [ErIII2(COT′′)3] | 323 | — | 12 | 0.0022 | <0.2 (1.8 K) | No | 13a |
| K2(THF)4[ErIII2(COT)4] | 306 | — | 12 | 0.0018 | ∼0 (1.8 K) | No | 13a |
| [Zn2(L1)2DyCl3]·2H2O | 430 | <4.5 | 8 | 0.000166–0.0005 | ∼0 (1.8 K) | Yes | 9b |
| 12 | 0.02 | — | |||||
| 434 c | — | — | — | 0.03 (1.8 K) c | |||
| [Zn2(L1)2Dy(MeOH)Br3]·3H2O | 233 | <3.5 | 6 | 0.000166–0.0005 | ∼0 (1.8 K) | Yes | 9b |
| [Zn2(L1)2Dy(H2O)Br2]·[ZnBr4]0.5 | 121 | <2.5 | 4 | 0.000166–0.0005 | ∼0 (1.8 K) | Yes | 9b |
| [Zn2(L2)2DyCl3]·2H2O | 398 | <4.5 | 8 | 0.000166–0.0005 | ∼0 (1.8 K) | Yes | 9b |
| [Fe2Dy(L3)2(H2O)]ClO4·2H2O | 459 | — | — | — | — | Yes | 9c |
| [Zn2Dy(L4)2(MeOH)]NO3 | 439 | — | 11 | 0.02 | >0.02 (2.0 K) | Yes | 9d |
| [Co2Dy(L4)2(H2O)]NO3 | 600 | — | — | — | — | Yes | 9a |
aHysteresis mode.
bContinuous sweep mode.
cDiluted in diamagnetic matrix.
d(—) = not reported. (∼) = close to but not equal to. BIPMTMS = {C(PPh2NSiMe3)2}2–; 18C6 = 18-crown-6; Cp* = pentamethylcyclopentadienide; COT = cyclooctatetraene; DME = dimethoxyethane; COT′′ = 1,4-bis(trimethylsilyl)cyclooctatetraenyl dianion; THF = tetrahydrofuran; Pc = dianion of phthalocyanine; TBA = tetra-n-butylammonium; Pc(phth3) = [bis(N,N,N,N-tetra((S)-methyl(phenyl)methyl)-29H,31H-2,3,9,10,16,17,23,24-phthalocyaninatotetradicarboximide); Pc(OEt)8 = dianion of 2,3,9,10,16,17,23,24-octaethoxyphthalocyanine; SDOP = (S)-2-(dodecyloxy)propan-1-oxy; Pc′ = octa(tert-butylphenoxy)-phthalocyanine; Cp′ = η5-C5H4Me; Mes = mesityl; bpym = 2,2′-bipyrimidine; hfac = hexafluoroacetylacetonate; PyNO = pyridine-N-oxide; H2L1 = N,N′-bis(3-methoxysalicylidene)phenylene-1,2-diamine; H2L2 = N,N′-bis(3-methoxysalicylidene)-1,2-diaminocyclohexane; L3 = 2,2′,2′′-(((nitrilotris(ethane-2,1-diyl))tris(azanediyl))tris(methylene))tris-(4-chlorophenol); L4 = 2,2′,2′′-(((nitrilotris(ethane-2,1-diyl))tris(azanediyl))tris(methylene))tris-(4-bromophenol).