A Single‐Chain Magnet Tape Based on Hexacyanomanganate(III)

Zhang, Yuan‐Zhu; Zhao, Huaiqing; Funck, Edward; Dunbar, Kim R.

doi:10.1002/anie.201410664

Cited by 38 publications

(24 citation statements)

References 63 publications

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“…[14][15][16][17][18][19][20][21] This might be one of the reasons why an increasing number of such compounds were recently reported and some selected examples are given in the reference list. [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] For the synthesis of such compounds cations of large magnetic anisotropy must be connected by ligands into 1D magnetic chains with a high ratio between intra-and interchain interactions. Therefore, for optimization of the properties of such materials systematic investigations of the influence of chemical and structural modification on their magnetic properties might be helpful.…”

Section: Introductionmentioning

confidence: 99%

Influence of metal coordination and co-ligands on the magnetic properties of 1D Co(NCS)₂ coordination polymers

Rams

Tomkowicz

Böhme

et al. 2017

Phys. Chem. Chem. Phys.

108

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Two new transition metal thiocyanate coordination polymers with the composition [Co(NCS)(4-vinylpyridine)] (1) and [Co(NCS)(4-benzoylpyridine)] (2) were synthesized and their crystal structures were determined. In both compounds the Co cations are octahedrally coordinated by two trans-coordinating 4-vinyl- or 4-benzoylpyridine co-ligands and four μ-1,3-bridging thiocyanato anions and linked into chains by the anionic ligands. While in 1 the N and the S atoms of the thiocyanate anions are also in trans-configuration, in 2 they are in cis-configuration. A detailed magnetic study showed that the intra-chain ferromagnetic coupling is slightly stronger for 2 than for 1, and that the chains in both compounds are weekly antiferromagnetically coupled. Both compounds show a long range magnetic ordering transition at T = 3.9 K for 1 and T = 3.7 K for 2, which is confirmed by specific heat measurements. They also show a metamagnetic transition at a critical field of 450 Oe (1) and 350 Oe (2), respectively. Below T1 and 2 exhibit magnetic relaxations resembling relaxations of single chains. The exchange constants obtained from magnetic and specific heat data are in good accordance with those obtained from constrained DFT calculations carried out on isolated model systems. The ab initio calculations allowed us to find the principal directions of anisotropy.

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Section: Introductionmentioning

confidence: 99%

Influence of metal coordination and co-ligands on the magnetic properties of 1D Co(NCS)₂ coordination polymers

Rams

Tomkowicz

Böhme

et al. 2017

Phys. Chem. Chem. Phys.

108

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“…Alternating current (ac) susceptibility measurements indicate a characteristic quasi‐1D system showing coexistence of slow relaxation and long‐range ordering (Figure S15, Supporting Information). Fitting the relaxation rate of the ac data measured under 1 kOe dc field by the Arrhenius law gives τ 0 = 8.52 × 10 −13 s and Δ E / k B = 57 K, which are normal values for quasi‐1D systems (Figure S16b, Supporting Information) …”

mentioning

confidence: 94%

Selective CO₂ Capture and High Proton Conductivity of a Functional Star‐of‐David Catenane Metal–Organic Framework

Huang

Deng

et al. 2017

Advanced Materials

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Network structures based on Star-of-David catenanes with multiple superior functionalities have been so far elusive, although numerous topologically interesting networks are synthesized. Here, a metal-organic framework featuring fused Star-of-David catenanes is reported. Two triangular metallacycles with opposite handedness are triply intertwined forming a Star-of-David catenane. Each catenane fuses with its six neighbors to generate a porous twofold intercatenated gyroid framework. The compound possesses exceptional stability and exhibits multiple functionalities including highly selective CO capture, high proton conductivity, and coexistence of slow magnetic relaxation and long-range ordering.

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“…In particular, tridentate coordination mode (iii–a) is the most popular coordination fashion among them. For instance, tptz complexes of Mn(II), Fe(II), Fe(III), Co(II), Ni(II), Cu(I), Cu(II), Zn(II), Cd(II), Ru(II), Rh(III), Ag(I), Os(II), Mn(II)/Mn(III), Mn(II)/W(V), M(III)/Ln(III) (M=Fe, Co; Ln=La, Pr, Nd, Sm, Eu, Gd, Tb), and M 1 (II, III)/M 2 (V) (M 1 =Fe, Co, Cu; M 2 =Mo, W) have been widely reported in coordination mode (iii–a), ranging from mononuclear to polymeric complexes. In addition, the limited mononuclear tptz complexes of Cu(I), Ru(II), Rh(III), Re(I), and Ir(III) have been reported as another bidentate coordination mode (iii–b), together with dinuclear and polymeric tptz complexes of Cu(II) and Ag(I) containing coordination mode (iii–b).…”

Section: Introductionmentioning

confidence: 99%

Structurally Diverse Polynuclear Copper(I) Complexes Bridged by Pyrimidine–, Pyrazine–, and Triazine–based Ligands with Several 2–Pyridyl Groups

et al. 2016

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The reactions of [Cu(MeCN)4]BF4 or [Cu(C2H4)n]ClO4 complexes with 4,6–bis(2–pyridyl)pyrimidine (bppym) in Me2CO under C2H4 afforded dinuclear Cu(I)–bppym/C2H4 adducts [Cu2‐(bppym)(C2H4)2](BF4)2•Me2CO (1) and [Cu2(bppym)2(C2H4)2](ClO4)2•Me2CO (2), respectively. One Cu(I) atom is coordinated by bppym and C2H4 in a distorted trigonal–planar geometry. The other Cu(I) atom is coordinated by bppym, Me2CO, and C2H4 toward a distorted tetrahedral geometry. The reaction of [Cu(MeCN)4]BF4 with 2,3–bis(2–pyridyl)pyrazine (bppz) in MeOH under C2H4 afforded a Cu(I)–bppz coordination polymer {[Cu2(bppz)2](BF4)2•MeOH}n (3). Two Cu(I) atoms are alternately bridged by two bppz to form a 1–D zigzag–chain structure. Each Cu(I) coordination sphere is largely distorted from a normal tetrahedral structure toward a square planar structure. The reaction of [Cu(MeCN)4]PF6 with 2,4,6–tris(2–pyridyl)–s–triazine (tptz) in MeEtCO under C2H4 afforded a tetranuclear Cu(I)–tptz/C2H4 adduct [Cu4(tptz)2(C2H4)2(MeCN)2](PF6)4•MeEtCO (4 b). Two Cu(I) atoms are bridged by the central triazine ring, the 2–pyridyl group, the central triazine ring, and the 2–pyridyl group in a different tptz to form a double helical structure. The other Cu(I) atom is coordinated by the central triazine ring, the 2–pyridyl group, MeCN, and C2H4 in a distorted tetrahedral geometry. The reaction of [Cu(MeCN)4]PF6 with tetra–2–pyridylpyrazine (tppz) in MeOH under C2H4 afforded a tetranuclear Cu(I)–tppz complex [Cu4(tppz)2(MeCN)4](PF6)4•MeOH (5 a). Each Cu(I) atom is coordinated by the central pyrazine ring, the 2–pyridyl group, the 2–pyridyl group in a different tppz, and MeCN in a distorted tetrahedral geometry. These four Cu(I) atoms are bridged by the two opposite tppz ligands to form a unique tetranuclear Cu(I) cage structure.

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A Single‐Chain Magnet Tape Based on Hexacyanomanganate(III)

Cited by 38 publications

References 63 publications

Influence of metal coordination and co-ligands on the magnetic properties of 1D Co(NCS)₂ coordination polymers

Influence of metal coordination and co-ligands on the magnetic properties of 1D Co(NCS)₂ coordination polymers

Selective CO₂ Capture and High Proton Conductivity of a Functional Star‐of‐David Catenane Metal–Organic Framework

Structurally Diverse Polynuclear Copper(I) Complexes Bridged by Pyrimidine–, Pyrazine–, and Triazine–based Ligands with Several 2–Pyridyl Groups

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A Single‐Chain Magnet Tape Based on Hexacyanomanganate(III)

Cited by 38 publications

References 63 publications

Influence of metal coordination and co-ligands on the magnetic properties of 1D Co(NCS)2 coordination polymers

Influence of metal coordination and co-ligands on the magnetic properties of 1D Co(NCS)2 coordination polymers

Selective CO2 Capture and High Proton Conductivity of a Functional Star‐of‐David Catenane Metal–Organic Framework

Structurally Diverse Polynuclear Copper(I) Complexes Bridged by Pyrimidine–, Pyrazine–, and Triazine–based Ligands with Several 2–Pyridyl Groups

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Influence of metal coordination and co-ligands on the magnetic properties of 1D Co(NCS)₂ coordination polymers

Influence of metal coordination and co-ligands on the magnetic properties of 1D Co(NCS)₂ coordination polymers

Selective CO₂ Capture and High Proton Conductivity of a Functional Star‐of‐David Catenane Metal–Organic Framework