MH2P2O7 (M = Co, Ni):  Metamagnetic Interaction between the Zigzag Octahedral Chains

Yang, Tao; Ju, Jing; Li, Guobao; Yang, Sihai; Sun, Junliang; Liao, Fuhui; Lin, Jianhua; Sasaki, Juns; Toyota, Naoki

doi:10.1021/ic061665q

Cited by 22 publications

(8 citation statements)

References 22 publications

(14 reference statements)

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“…31,34-42 However, because of the strong spin-orbit coupling of Co II ions, the magnetic interaction might be more complicated. 1,35 This similar metamagneticlike transition was also observed in other polymeric chain systems containing ferromagnetic 1D double EO azido bridges with weak interchain antiferromagnetic interactions. 31,34,36,41 For instance, the previous related compound [Mn(tptz)(N 3 ) 2 ] n 36 (tptz = 2,4,6-tris(2pyridyl)-1,3,5-triazine), which contains similar double EO azidebridged 1D chains that are assembled by face-to-face p-p and C-H ◊ ◊ ◊ p interactions, revealed overall metamagnetic behaviour below 2.7 K with a very small H c of approximately 80 Oe.…”

Section: Magnetic Measurementssupporting

confidence: 75%

“…5, which revealed that 1 is a metamagnet with a typical crossover magnetic hysteresis in the slightly sigmoid shape of the M(H) curve. [34][35][36] The critical field H c is ª 70 Oe, estimated as the field at which a maximum dM/d H value is reached. This metamagnetic-like transition results from the presence of weak interchain antiferromagnetic interactions among the strongly ferromagnetic chains.…”

Section: Magnetic Measurementsmentioning

confidence: 99%

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Structural diversity and magnetic properties in 1D and 2D azido-bridged cobalt(ii) complexes with 1,2-bis(2-pyridyl)ethylene

2011

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By utilizing a flexible co-ligand 1,2-bis(2-pyridyl)ethylene (2,2'-bpe), two new azido-bridged cobalt(II) complexes with the formulae [Co₃(N₃)₆(OH₂)₂(2,2'-bpe)₂](n)(2,2'-bpe)(n) (1) and [Co(N₃)₂(2,2'-bpe)₂](n) (2) have been synthesized and structurally characterized. Compound 1 shows an uncommon 1D chain comprised of double EO azido bridged five- and six-coordinated Co(II) geometries in a unique (-5-5-6-)(n) sequence of the coordination number. The 2,2'-bpe acts as a terminal co-ligand and an uncoordinated molecule in the crystal lattice. Moreover the adjacent 1D chain is assembled by C-Hπ interactions and the intermolecular hydrogen bonding between uncoordinated 2,2'-bpe and coordinated water molecules building a 2D layer. Whereas, compound 2 is a 2D coordination network containing the alternating double EO and double EE bridging modes of azides and ditopic 2,2'-bpe bridges. The magnetic investigation of 1 reveals dominant intra-chain ferromagnetic interactions, with the double EO azide-bridge and weak inter-chain antiferromagnetic interactions, with overall metamagnetic behaviour, having magnetic ordering at 6 K. The magnetic behaviour of 2 shows spin-canted antiferromagnetism below a T(N) of 12 K.

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Section: Magnetic Measurementssupporting

confidence: 75%

Section: Magnetic Measurementsmentioning

confidence: 99%

Structural diversity and magnetic properties in 1D and 2D azido-bridged cobalt(ii) complexes with 1,2-bis(2-pyridyl)ethylene

2011

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“…These steps are diminished above an applied field of approximately 0.01 T at 2 K, thus indicating a possible metamagnetic transition. This phenomenon has similarly been observed in some of the recent examples, such as MH 2 P 2 O 7 8a and LiM 2 H 3 (P 2 O 7 ) 2 8b (M=Ni, Co), in which the magnetic chains are reportedly quasi‐one‐dimensional. Second, the AC magnetic susceptibility (Figure 5 and Figure S9 in the Supporting Information) shows a rather complicated frequency dependence, where the nonzero χ ′′ signal covers a broad range of temperatures (ca.…”

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confidence: 74%

Spaced Heterometallic 3d–4f Magnetic Chains from the Pseudo‐One‐Dimensional Na₂LnMnO(AsO₄)₂ Series: Stepped Magnetization in the Na₂GdMnO(AsO₄)₂ Ferromagnet

et al. 2011

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Stufenform: Verbindungen der Na2LnMnO(AsO4)2‐Reihe enthalten Ln‐überdachte ferromagnetische [MnO4]∞‐Ketten. Im Fall von Ln=Gd auftretende magnetische Anomalien wurden mit einer stärkeren strukturellen Einschränkung dieser magnetischen Ketten erklärt. Mit stufenweiser Magnetisierung und Mehrspin‐Dynamik (siehe Bild; Mn blau, Gd violett, O rot) treten zwei Phänomene auf, die zuvor nicht für quasi‐eindimensionale 3d‐4f‐Festkörper beobachtet wurden.

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“…We would like to point out that similar replacement has also been observed in other systems. For example, H 2 M 2 PO 7 (M=Ni, Co)26 is a hydrated metal phosphate; its lithium derivate LiH 3 M 2 (P 2 O 7 ) 2 ,27 in which 1/4 of the protons on hydroxyl groups are replaced by Li + , can be obtained by adding LiNO 3 to the reaction systems.…”

Section: Resultsmentioning

confidence: 99%

Na₈[Cr₄B₁₂P₈O₄₄(OH)₄][P₂O₇]⋅nH₂O: A 3D Borophosphate Framework with Spherical Cages

Yang

Sun

et al. 2008

Chemistry A European J

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A chromium borophosphate–phosphate (Na8[Cr4B12P8O44(OH)4][P2O7]⋅nH2O, 1), which has an unusual 3D framework structure, was synthesized under hydrothermal conditions. The framework consists of spherical cages composed of CrO6, PO4, BO4, and BO3 polyhedra. The cages are located at the vertices and the body center of the cubic cell and are interconnected through 12‐membered‐ring windows along the {111} direction. The actual framework structure is very complex, but the description can be simplified by using the 5‐connected fundamental building cluster [CrP5B3O24]11−. In addition, 1 represents the first borate‐rich borophosphate that contains a 3D borophosphate partial framework (${{{\hfill 3\atop \hfill \infty }}}$[B3P2O11(OH)]) in which the fundamental building unit is an oB dreier single ring (Δ4□:□<Δ2□>□). The cavities of the framework are filled with disengaged water molecules and Na+ counterions. The former can be reversibly desorbed and reabsorbed and the latter can be exchanged by Li+ ions, which results in significant shrinkages of the cell volume.

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MH₂P₂O₇ (M = Co, Ni): Metamagnetic Interaction between the Zigzag Octahedral Chains

Cited by 22 publications

References 22 publications

Structural diversity and magnetic properties in 1D and 2D azido-bridged cobalt(ii) complexes with 1,2-bis(2-pyridyl)ethylene

Structural diversity and magnetic properties in 1D and 2D azido-bridged cobalt(ii) complexes with 1,2-bis(2-pyridyl)ethylene

Spaced Heterometallic 3d–4f Magnetic Chains from the Pseudo‐One‐Dimensional Na₂LnMnO(AsO₄)₂ Series: Stepped Magnetization in the Na₂GdMnO(AsO₄)₂ Ferromagnet

Na₈[Cr₄B₁₂P₈O₄₄(OH)₄][P₂O₇]⋅nH₂O: A 3D Borophosphate Framework with Spherical Cages

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MH2P2O7 (M = Co, Ni): Metamagnetic Interaction between the Zigzag Octahedral Chains

Cited by 22 publications

References 22 publications

Structural diversity and magnetic properties in 1D and 2D azido-bridged cobalt(ii) complexes with 1,2-bis(2-pyridyl)ethylene

Structural diversity and magnetic properties in 1D and 2D azido-bridged cobalt(ii) complexes with 1,2-bis(2-pyridyl)ethylene

Spaced Heterometallic 3d–4f Magnetic Chains from the Pseudo‐One‐Dimensional Na2LnMnO(AsO4)2 Series: Stepped Magnetization in the Na2GdMnO(AsO4)2 Ferromagnet

Na8[Cr4B12P8O44(OH)4][P2O7]⋅nH2O: A 3D Borophosphate Framework with Spherical Cages

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MH₂P₂O₇ (M = Co, Ni): Metamagnetic Interaction between the Zigzag Octahedral Chains

Spaced Heterometallic 3d–4f Magnetic Chains from the Pseudo‐One‐Dimensional Na₂LnMnO(AsO₄)₂ Series: Stepped Magnetization in the Na₂GdMnO(AsO₄)₂ Ferromagnet

Na₈[Cr₄B₁₂P₈O₄₄(OH)₄][P₂O₇]⋅nH₂O: A 3D Borophosphate Framework with Spherical Cages