We have prepared and characterized three coordination polymers formulated as Dy2(C6O4Cl2)3(fma)6 ⋅ 4.5fma (1) and Dy2(C6O4X2)3(fma)6 ⋅ 4fma ⋅ 2H2O with X=Br (2) and Cl (3), where fma=formamide and ...C6O4X22−=3,6‐disubstituted‐2,5‐dihydroxy‐1,4‐benzoquinone dianion with X=Cl (chloranilato) and Br (bromanilato). Compounds 1 and 3 are solvates obtained with slow and fast precipitation methods, respectively. Compounds 2 and 3 are isostructural and only differ in the X group of the anilato ligand. The three compounds present (6,3)‐gon two‐dimensional hexagonal honey‐comb structures. Magnetic measurements indicate that the three compounds show slow relaxation of the magnetization at low temperatures when a continuous magnetic field is applied, although with different relaxation times and energy barriers depending on X and the crystallisation molecules. Compounds 1–3 represent the first examples of anilato‐based lattices with formamide and field‐induced slow relaxation of the magnetization.
The anilato‐based DyIII‐containing compounds formulated as Dy2(C6O4Cl2)3(fma)6 ⋅ 4.5fma (1) and Dy2(C6O4X2)3(fma)6 ⋅ 4fma ⋅ 2H2O, with X=Br (2) and Cl (3), prepared with formamide as coordinating solvent, are coordination polymers with a honey‐comb layered structure showing slow magnetic relaxation when a DC field is applied. Compounds 1 and 3 are solvates obtained with a slow and fast crystallization method, respectively. Compounds 2 and 3 are isostructural.
We exploit the high versatility of the solvent ethylene glycol (eg = CH
OH-CH
OH) acting as a ligand with three different coordination modes: terminal (κ
), chelate (κ
), and bridge (1κ
,2κ
) to ...prepare a novel family of six different coordination polymers with Dy
and three different anilato ligands (3,6-disubstituted-2,5-dihydroxy-1,4-benzoquinone dianion = C
O
X
, with X = H, Cl, and Br). With the X = H derivative (dhbq
), we have prepared Dy
(dhbq)
(eg)
(μ-eg)·4eg·2H
O (
), a 3D diamond-like network with a chelate and bridging eg molecules. With the X = Cl derivative (chloranilato), we have prepared Dy
(C
O
Cl
)
(eg)
·2eg·H
O (
) and Dy
(C
O
Cl
)
(μ-eg)(H
O)
·2eg·7H
O (
). Compound
has a 2D (6,3)-gon brick-wall lattice and contains a chelate and a terminal eg molecule. Compound
has a 3D diamond-like topology as
, although now the chelate eg has been replaced by two water molecules. Finally, with the X = Br derivative (bromanilato), we have obtained Dy
(C
O
Br
)
(eg)
(CH
OH)
·2eg·4CH
OH (
), Dy
(C
O
Br
)
(eg)
·4eg (
), and Dy
(C
O
Br
)
(eg)
(H
O)·2eg·H
O (
). Compound
has a 2D (6,3)-gon herringbone topology and contains a chelate eg and a MeOH molecule. Compounds
and
have a 2D (6,3)-gon brick-wall topology with a chelate and a terminal eg molecules (in
and in one of the two independent Dy centers of
). The other Dy center in
has a chelate eg and a water molecule. All the compounds show slow relaxation of the magnetization at low temperatures (in compounds
,
, and
with no applied DC field). The magnetization of compounds
-
relaxes through Orbach and direct mechanisms when a DC field is applied and through an Orbach and/or quantum tunneling mechanism when no DC field is applied.
We exploit the high versatility of the solvent ethylene glycol (eg = CH2OH-CH2OH) acting as a ligand with three different coordination modes: terminal (κO), chelate (κ2 O,O′), and bridge (1κO,2κO′) ...to prepare a novel family of six different coordination polymers with DyIII and three different anilato ligands (3,6-disubstituted-2,5-dihydroxy-1,4-benzoquinone dianion = C6O4X2 2–, with X = H, Cl, and Br). With the X = H derivative (dhbq2–), we have prepared Dy2(dhbq)3(eg)2(μ-eg)·4eg·2H2O (1), a 3D diamond-like network with a chelate and bridging eg molecules. With the X = Cl derivative (chloranilato), we have prepared Dy2(C6O4Cl2)3(eg)4·2eg·H2O (2) and Dy2(C6O4Cl2)3(μ-eg)(H2O)4·2eg·7H2O (3). Compound 2 has a 2D (6,3)-gon brick-wall lattice and contains a chelate and a terminal eg molecule. Compound 3 has a 3D diamond-like topology as 1, although now the chelate eg has been replaced by two water molecules. Finally, with the X = Br derivative (bromanilato), we have obtained Dy2(C6O4Br2)3(eg)2(CH3OH)2·2eg·4CH3OH (4), Dy2(C6O4Br2)3(eg)4·4eg (5), and Dy2(C6O4Br2)3(eg)3(H2O)·2eg·H2O (6). Compound 4 has a 2D (6,3)-gon herringbone topology and contains a chelate eg and a MeOH molecule. Compounds 5 and 6 have a 2D (6,3)-gon brick-wall topology with a chelate and a terminal eg molecules (in 5 and in one of the two independent Dy centers of 6). The other Dy center in 6 has a chelate eg and a water molecule. All the compounds show slow relaxation of the magnetization at low temperatures (in compounds 1, 2, and 5 with no applied DC field). The magnetization of compounds 1–6 relaxes through Orbach and direct mechanisms when a DC field is applied and through an Orbach and/or quantum tunneling mechanism when no DC field is applied.
