Metal complexes of tripodal ligands as ionophores for alkali metal ions

Katsuta, Shoichi; Shimizu, Yuichi; Takahashi, Ryota; Kanaya, Naoki; Imoto, Takahiro; Takeda, Yasuyuki

doi:10.1039/c2nj40171a

Cited by 7 publications

(6 citation statements)

References 22 publications

(5 reference statements)

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“…All reagents were obtained from commercial sources and used as received. The H 3 L ligand was prepared following previously reported procedures …”

Section: Methodsmentioning

confidence: 99%

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Zero-Field SMM Behavior Triggered by Magnetic Exchange Interactions and a Collinear Arrangement of Local Anisotropy Axes in a Linear Co₃^II Complex

Zabala-Lekuona,

Landart-Gereka,

Quesada-Moreno

et al. 2023

Inorg. Chem.

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A new linear trinuclear Co(II) 3 complex with a formula of [{Co(μ-L)} 2 Co] has been prepared by self-assembly of Co(II) ions and the N 3 O 3 -tripodal Schiff base ligand H 3 L, which is obtained from the condensation of 1,1,1-tris(aminomethyl)ethane and salicylaldehyde. Single X-ray diffraction shows that this compound is centrosymmetric with triple-phenolate bridging groups connecting neighboring Co(II) ions, leading to a paddle-wheel-like structure with a pseudo- C 3 axis lying in the Co–Co–Co direction. The Co(II) ions at both ends of the Co(II) 3 molecule exhibit distorted trigonal prismatic CoN 3 O 3 geometry, whereas the Co(II) at the middle presents an elongated trigonal antiprismatic CoO 6 geometry. The combined analysis of the magnetic data and theoretical calculations reveal strong easy-axis magnetic anisotropy for both types of Co(II) ions (| D | values higher than 115 cm –1 ) with the local anisotropic axes lying on the pseudo- C 3 axis of the molecule. The magnetic exchange interaction between the middle and ends Co(II) ions, extracted by using either a Hamiltonian accounting for the isotropic magnetic coupling and ZFS or the Lines’ model, was found to be medium to strong and antiferromagnetic in nature, whereas the interaction between the external Co(II) ions is weak antiferromagnetic. Interestingly, the compound exhibits slow relaxation of magnetization and open hysteresis at zero field and therefore SMM behavior. The significant magnetic exchange coupling found for [{Co(μ-L)} 2 Co] is mainly responsible for the quenching of QTM, which combined with the easy-axis local anisotropy of the Co II ions and the collinearity of their local anisotropy axes with the pseudo- C 3 axis favors the observation of SMM behavior at zero field.

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“…All reagents were obtained from commercial sources and used as received. The H 3 L ligand was prepared following previously reported procedures …”

Section: Methodsmentioning

confidence: 99%

“…The H 3 L ligand was prepared following previously reported procedures. 14 Physical Measurements. Elemental (C, H, and N) analyses were performed on a Leco CHNS-932 microanalyzer.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Zero-Field SMM Behavior Triggered by Magnetic Exchange Interactions and a Collinear Arrangement of Local Anisotropy Axes in a Linear Co₃^II Complex

Zabala-Lekuona,

Landart-Gereka,

Quesada-Moreno

et al. 2023

Inorg. Chem.

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“…A similar explanation may hold true for the extraction selectivity of dibenzo-24-crown-8 [17]. On the other hand, we have recently reported a more highly Cs + -selective ionophore, the 1,1,1-tris[(salicylideneamino)methyl]ethane -aluminium(III) complex, which has a rigid cavity suited for accommodating Cs + [9]. It appears certain that the rigidity of the ligand structure is an important factor for enhancing the selectivity.…”

Section: Resultsmentioning

confidence: 92%

“…Potassium carbonate of guaranteed reagent grade was dried over phosphorus pentoxide under vacuum for one day. Aqueous solutions of alkali metal picrates were prepared as described previously [9]. Hydrochloric acid of super special grade (Kanto Chemical Co.) was used as received.…”

Section: Reagents and Instrumentsmentioning

confidence: 99%

Extraction Properties of <i>p</i>-Methyloxacalix[3]arene Methyl Ether for Alkali Metal Ions

Kanaya

Matsuhashi

Katsuta

2015

SERDJ

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“…1) was first reported nearly fifty years ago (Johnston, 1974), although its structure was published recently (Yamaguchi et al, 2008b). Complexes of the triply deprotonated ligand, (sal) 3 tame, have been reported with transition metals and lanthanides (Sunatsuki et al, 2008;Yamaguchi et al, 2004Yamaguchi et al, , 2008aYokoyama et al, 2010;Kojima, 2000;Kobayashi et al, 2006;Urushigawa et al, 1977), but have received little attention to date with maingroup elements (Katsuta et al, 2012;Kojima et al, 2000). The H 3 (sal) 3 tame ligand has already been used to synthesize potential technetium radiopharmaceuticals (Marmion et al, 1996).…”

Section: Chemical Contextmentioning

confidence: 99%

Crystal structures of {1,1,1-tris[(salicylaldimino)methyl]ethane}gallium as both a pyridine solvate and an acetonitrile 0.75-solvate and {1,1,1-tris[(salicylaldimino)methyl]ethane}indium dichloromethane solvate

2020

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The sexadentate ligand 1,1,1-tris[(salicylideneamino)methyl]ethane has been reported numerous times in its triply deprotonated form coordinated to transition metals and lanthanides, yet it has been rarely employed with main-group elements, including in substituted forms. Its structures with gallium and indium are reported as solvates, namely, ({[(2,2-bis{[(2-oxidobenzylidene)amino-κ2 N,O]methyl}propyl)imino]methyl}phenololato-κ2 N,O)gallium(III) pyridine monosolvate, [Ga(C26H24N3O3)]·C5H5N, the acetonitrile 0.75-solvate, [Ga(C26H24N3O3)]·0.75C2H3N, and ({[(2,2-bis{[(2-oxidobenzylidene)amino-κ2 N,O]methyl}propyl)imino]methyl}phenololato-κ2 N,O)indium(III) dichloromethane monosolvate, [In(C26H24N3O3)]·CH2Cl2. All three metal complexes are pseudo-octahedral and each structure contains multiple weak C—H...O and/or C—H...N intermolecular hydrogen-bonding interactions. The syntheses and additional characterization in the forms of melting points, high-resolution mass spectra, infra-red (IR) spectra, and 1H and 13C NMR spectra are also reported.

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Metal complexes of tripodal ligands as ionophores for alkali metal ions

Cited by 7 publications

References 22 publications

Zero-Field SMM Behavior Triggered by Magnetic Exchange Interactions and a Collinear Arrangement of Local Anisotropy Axes in a Linear Co₃^II Complex

Zero-Field SMM Behavior Triggered by Magnetic Exchange Interactions and a Collinear Arrangement of Local Anisotropy Axes in a Linear Co₃^II Complex

Extraction Properties of <i>p</i>-Methyloxacalix[3]arene Methyl Ether for Alkali Metal Ions

Crystal structures of {1,1,1-tris[(salicylaldimino)methyl]ethane}gallium as both a pyridine solvate and an acetonitrile 0.75-solvate and {1,1,1-tris[(salicylaldimino)methyl]ethane}indium dichloromethane solvate

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Metal complexes of tripodal ligands as ionophores for alkali metal ions

Cited by 7 publications

References 22 publications

Zero-Field SMM Behavior Triggered by Magnetic Exchange Interactions and a Collinear Arrangement of Local Anisotropy Axes in a Linear Co3II Complex

Zero-Field SMM Behavior Triggered by Magnetic Exchange Interactions and a Collinear Arrangement of Local Anisotropy Axes in a Linear Co3II Complex

Extraction Properties of <i>p</i>-Methyloxacalix[3]arene Methyl Ether for Alkali Metal Ions

Crystal structures of {1,1,1-tris[(salicylaldimino)methyl]ethane}gallium as both a pyridine solvate and an acetonitrile 0.75-solvate and {1,1,1-tris[(salicylaldimino)methyl]ethane}indium dichloromethane solvate

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Zero-Field SMM Behavior Triggered by Magnetic Exchange Interactions and a Collinear Arrangement of Local Anisotropy Axes in a Linear Co₃^II Complex

Zero-Field SMM Behavior Triggered by Magnetic Exchange Interactions and a Collinear Arrangement of Local Anisotropy Axes in a Linear Co₃^II Complex