Building Molecular Minerals: All Ferric Pieces of Molecular Magnetite

Abstract

In the legends to the Figures 3 and 4 the sweep rates and temperatures have been transposed. The correct values are as follows: Figure 3: sweep rate 0.001 Ts À1 and T = 0.04-0.5 K; Figure 4: sweep rate 0.007 Ts À1 and T = 0.01-0.5 K. The authors apologize for the error.

From single-molecule magnetism to long-range ferromagnetism inHpyr[Fe17O16(OH)Vecchini1, Ryan2, Cranswick3 et al. 2008Phys. Rev. B151100View full textAdd to dashboardCite

“…The inner Fe 3+ ion and the four outer Fe 3+ sit in the tetrahedral sites of the lattice with the others occupying the octahedral sites. 25,26 Displayed in Table I are the unit cell coordinates of the seven crystallographically distinct Fe atoms which are related by symmetry operations to make up the Fe 17 mol- For the neutron diffraction experiments, deuteration of the sample was necessary in order to avoid the enormous incoherent scattering from hydrogen ͑ inc = 80.3 barns͒. This scattering leads to an unacceptably high background signal that dominates even the coherent nuclear scattering and makes it essentially impossible to observe any magnetic scattering.…”

“…The presence of long-range ferromagnetic order in the prototypical molecular magnet Mn 12 was recently confirmed by singlecrystal neutron diffraction. 13 The molecular magnet Hpyr͓Fe 17 25,26 The Fe 17 molecules are bound together in the crystal solely by van der Waals forces, hence prohibiting any intermolecular superexchange pathway. An interesting and possibly unique characteristic of Fe 17 is that once the constituent ligands have been chosen, the molecules can be arranged in different crystal packings without affecting the individual molecules themselves, 9 keeping the surrounding ligands, the molecular high-spin ground state, and the magnetic anisotropy unaltered.…”

New twisted-saddle dodecanuclear iron(III) clusters with adamantane-like [Fe4O6] core

“…Among the reported polynuclear metal clusters, many highnuclearity Fe clusters have been investigated, including Fe 9 [7], Fe 13 [8], Fe 14 [9], Fe 16 [10], Fe 17 [7], Fe 18 [11,12], Fe 19 [13], Fe 22 [14] , Fe 28 [15], and Fe 64 [16]. And Fe 17 gives the highest ground spin state of S = 35 / 2 [7].…”

“…Among the reported polynuclear metal clusters, many highnuclearity Fe clusters have been investigated, including Fe 9 [7], Fe 13 [8], Fe 14 [9], Fe 16 [10], Fe 17 [7], Fe 18 [11,12], Fe 19 [13], Fe 22 [14] , Fe 28 [15], and Fe 64 [16]. And Fe 17 gives the highest ground spin state of S = 35 / 2 [7]. On the other hand, many versatile polyalcohols and aminoalcohols, such as hydroxymethylpyridine [17], pyridine-2,6-dimethanol, Nmethyldiethanolamine, N-ethyldiethanolamine [15,17] and triethanolamine [18] (Scheme 1), have been extensively used to develop new Fe or Mn clusters with high nuclearities and structural types [17,[19][20][21][22].…”

Ein [Fe19]‐“Super‐Lindqvist”‐Aggregat und ein großes, sich durchdringendes, dreidimensionales Koordinationspolymer aus Solvothermalreaktionen von [Fe2(OtBu)6] mit Ethanol

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[2][3][4] 18, [5,6] 17, [7][8][9] 16, [10,11] 14 [12][13][14] und 13 [15,16] [24][25][26] Bisher wurde nur über sehr wenige molekulare Metall-Sauerstoff-Verbindungen mit mehr als drei m 6 -Oxo-Gruppen berichtet. [27][28][29][30] Ziel dieser Arbeit war die Synthese mehrkerniger EisenSauerstoff-Spezies mit mehr als zwei m 6 -Oxo-Gruppen.

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