Syntheses, structures, and magnetic properties of multinuclear complexes constructed with complexed ligands, [M(bpca)2]+ (M=Cr(III), Fe(III), Co(III); Hbpca=bis(2-pyridylcarbonyl)amine)

Kajiwara, Takashi; Sensui, Ryosuke; Noguchi, Tomoko; Kamiyama, Asako; Ito, Tasuku

doi:10.1016/s0020-1693(02)01086-1

Cited by 53 publications

(31 citation statements)

References 15 publications

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“…5 [53]. With its two pockets comprising different hard-soft acid character it can be used to obtain structures with heterometallic motifs, and gives rise to dimeric species [54], trimeric species [55,56], and extended structures [57][58][59][60]. The pbca-ligand has been used to bridge different 3d ions or to alternate them with lanthanides.…”

Section: Compartmentalized Ligandsmentioning

confidence: 99%

Strategies towards single molecule magnets based on lanthanide ions

Sessoli

Powell

2009

Coordination Chemistry Reviews

1,441

707

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Section: Compartmentalized Ligandsmentioning

confidence: 99%

Strategies towards single molecule magnets based on lanthanide ions

Sessoli

Powell

2009

Coordination Chemistry Reviews

1,441

707

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“…It acts as a building block to form polynuclear complexes and the coordination networks of huge supramolecular architectures [11][12][13][14][15]. Also its rigidity and trigonal geometry can lead to the formation of porous frameworks enclosing cavities and channels with different metals [16,17].…”

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confidence: 99%

Nickel(II) polypyridyl Complexes of 2,4,6-Tris(2-pyridyl)-1,3,5-triazine

et al. 2012

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The synthesis, purification, characterization, electrochemical properties, and fluorescence quenching of two new mononuclear Ni(II) complexes, [Ni(tptz) (CH 3 OH)Cl 2 ] (1) and [Ni(tptz) 2 ](PF 6 ) 2 ÁCH 3 CN (2), containing the ligand 2,4,6-tris(2-pyridyl)-1,3,5-triazine (tptz) are described. Solid state structures of both complexes have been determined by single crystal X-ray crystallography. In (1) and (2), the Ni(II) metal centers use the major coordination site of the tptz ligand and the coordination geometry around the Ni(II) is a distorted octahedron. The free tptz ligand has three emission bands that are assigned to the 1 (p-p * ) and 1 (n-p * ) states. The fluorescence spectra of (1) and (2) show that the fluorescence quenching of the tptz fluorophore proceeds via an energy transfer process. Magnetic susceptibility data derived from paramagnetic NMR revealed effective magnetic moments of 2.75 l B for (1), and 2.91 l B for (2) at room temperature. Cyclic voltammetry of (1) shows that the Ni(III/II) reduction couple is quasi-reversible whereas in complex (2), the Ni(II/I) couple indicates an electrochemical (EC) mechanism.

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Section: A Series Of 1d Nickel(ii)/zinc(ii)-lanthanide(iii) Coordinatmentioning

confidence: 99%

“…The four free carbonyl C-O groups in the resulting [M(L) 2 ] can further participate in coordination with metal ions, through which [M(L) 2 ] acts as a bis-bidentate bridging complex ligand to afford polynuclear [24][25][26] and multi-dimensional (1D and 2D structures) complexes [27][28][29] . In fact, the mononegative L is an ideal ligand to construct 3d-4f chain compounds, acting as tridentate N donor toward the 3d ion and bidentate O donor toward the 4f site.…”

Section: A Series Of 1d Nickel(ii)/zinc(ii)-lanthanide(iii) Coordinatmentioning

confidence: 99%

Syntheses, structures and magnetic properties of a family of one-dimensional M(II)-lanthanide(III) (M = Ni(II) and Zn(II)) coordination polymers

Zhang

2007

SCI CHINA SER B

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A series of 1D nickel(II)/zinc(II)-lanthanide(III) coordination polymers, [M(μ-L) 2 Ln(NO 3 ) 3 ] n ·solvents (HL = bis(2-pyridylcarbonyl)amine; M = Ni, Ln = Gd (1·NiGd), Tb (2·NiTb), Dy (3·NiDy), Ho (4·NiHo), Y (5·NiY); M = Zn, Ln = Gd (6·ZnGd), Tb (7·ZnTb), Dy (8·ZnDy), Ho (9·ZnHo); solvents = H 2 O or H 2 O-ethanol), was synthesized and characterized. All of the complexes are isostructural at 293 K and crystallize in the orthorhombic space group Fddd. Magnetic measurements were performed on 1-9, where weak ferromagnetic interaction is found in 1·NiGd, ferromagnetic interaction in 2·NiTb and 3·NiDy, and antiferromagnetic interaction in 4·NiHo. A remarkable dc magnetic field dependence of ac susceptibilities was found in this series of complexes.nickel, lanthanide, 3d-4f coordination polymer, magnetic property Molecule-based magnetic materials have attracted increasing attention in recent years due to their significance in fundamental research and potential applications in molecular devices [1][2][3][4] . In the process of exploring novel molecular magnetic materials, the nature and spatial arrangement of the spin carriers are two of the most decisive factors to determine the magnetic behaviors of the resulting materials [5][6][7] . This is especially true in the constructions of single-molecule magnets (SMMs) [8] and single-chain magnets (SCMs) [9] , in both of which a high spin ground state (S ) and a large and negative axial zero-field splitting (D < 0) of that ground state are required.Paramagnetic lanthanide ions have begun to be adopted in the field of molecule-based magnetic materials because most of them can exhibit large anisotropic magnetic moments, which are required by magnetically ordered materials with large coercive fields [10] . Up to now, the incorporation of lanthanide ions with 3d metal ions (i.e., 3d-4f complexes) or radicals have resulted in various heteronuclear complexes exhibiting interesting magnetic behaviors, such as SMMs and SCMs [11][12][13][14][15][16][17][18][19][20][21] . The idea of incorporation of lanthanide ions into 3d-4f chain complexes opens a new way to build novel SCMs, though the rational design and synthesis of extended structures of coordination polymers are still a challenge.The multi-dentate ligand bis(2-pyridylcarbonyl)amine (HL) has long been used as a tridentate N ligand to form mononuclear complex [M(L) 2 ] [22,23] . The four free carbonyl C-O groups in the resulting [M(L) 2 ] can further participate in coordination with metal ions, through which [M(L) 2 ] acts as a bis-bidentate bridging complex ligand to afford polynuclear [24][25][26] and multi-dimensional

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Syntheses, structures, and magnetic properties of multinuclear complexes constructed with complexed ligands, [M(bpca)2]+ (M=Cr(III), Fe(III), Co(III); Hbpca=bis(2-pyridylcarbonyl)amine)

Cited by 53 publications

References 15 publications

Strategies towards single molecule magnets based on lanthanide ions

Strategies towards single molecule magnets based on lanthanide ions

Nickel(II) polypyridyl Complexes of 2,4,6-Tris(2-pyridyl)-1,3,5-triazine

Syntheses, structures and magnetic properties of a family of one-dimensional M(II)-lanthanide(III) (M = Ni(II) and Zn(II)) coordination polymers

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