Nano-sized tetralanthanoid-copper complex ions containing oximato bridges

Sohei Ueki; Muhamad Sahlan; Takayuki Ishida; Takashi Nogami

doi:10.1016/j.synthmet.2005.07.055

Nano-sized tetralanthanoid-copper complex ions containing oximato bridges

Sohei Ueki, Muhamad Sahlan, Takayuki Ishida, Takashi Nogami

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

Complexation of Ln^III(hfac)₃, Ln ^III(OAc)₃, and [Cu^II(dmg)₂] ^2- in the presence of Ph₄P⁺ gave [Ln ₄Cu₁]-type pentanuclear complexes (dmg = dimethylglyoximate dianion; Ln = La, Nd, Eu, Gd, Tb). Single-crystal X-ray diffraction analyses revealed that four Ln(IIl) ions formed a rectangular array around the copper ion at its inversion center. The [Ln₄Cu ₁] core structures are essentially the same regardless of the different Ln ions. From the magnetic susceptibility measurements, the Cu(dmg)₂ dianion moiety has been shown to play a role of the ferrimagnetic coupler among the Gd spins. The out-of-phase ac susceptibility of the [Tb₄Cu₁] complex exhibited anomalous frequency- dependence below 4 K, indicating blocking behavior potentially related to a single-molecule magnet.

Original language	English
Pages (from-to)	217-220
Number of pages	4
Journal	Synthetic Metals
Volume	154
Issue number	1-3
DOIs	https://doi.org/10.1016/j.synthmet.2005.07.055
Publication status	Published - 22 Sept 2005

Keywords

Lanthanide
Magnetic measurements
Molecule-based magnet
Rare earth metal
Single-molecule magnet

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10.1016/j.synthmet.2005.07.055

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title = "Nano-sized tetralanthanoid-copper complex ions containing oximato bridges",

abstract = "Complexation of LnIII(hfac)3, Ln III(OAc)3, and [CuII(dmg)2] 2- in the presence of Ph4P+ gave [Ln 4Cu1]-type pentanuclear complexes (dmg = dimethylglyoximate dianion; Ln = La, Nd, Eu, Gd, Tb). Single-crystal X-ray diffraction analyses revealed that four Ln(IIl) ions formed a rectangular array around the copper ion at its inversion center. The [Ln4Cu 1] core structures are essentially the same regardless of the different Ln ions. From the magnetic susceptibility measurements, the Cu(dmg)2 dianion moiety has been shown to play a role of the ferrimagnetic coupler among the Gd spins. The out-of-phase ac susceptibility of the [Tb4Cu1] complex exhibited anomalous frequency- dependence below 4 K, indicating blocking behavior potentially related to a single-molecule magnet.",

keywords = "Lanthanide, Magnetic measurements, Molecule-based magnet, Rare earth metal, Single-molecule magnet",

author = "Sohei Ueki and Muhamad Sahlan and Takayuki Ishida and Takashi Nogami",

year = "2005",

month = sep,

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doi = "10.1016/j.synthmet.2005.07.055",

language = "English",

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journal = "Synthetic Metals",

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TY - JOUR

T1 - Nano-sized tetralanthanoid-copper complex ions containing oximato bridges

AU - Ueki, Sohei

AU - Sahlan, Muhamad

AU - Ishida, Takayuki

AU - Nogami, Takashi

PY - 2005/9/22

Y1 - 2005/9/22

N2 - Complexation of LnIII(hfac)3, Ln III(OAc)3, and [CuII(dmg)2] 2- in the presence of Ph4P+ gave [Ln 4Cu1]-type pentanuclear complexes (dmg = dimethylglyoximate dianion; Ln = La, Nd, Eu, Gd, Tb). Single-crystal X-ray diffraction analyses revealed that four Ln(IIl) ions formed a rectangular array around the copper ion at its inversion center. The [Ln4Cu 1] core structures are essentially the same regardless of the different Ln ions. From the magnetic susceptibility measurements, the Cu(dmg)2 dianion moiety has been shown to play a role of the ferrimagnetic coupler among the Gd spins. The out-of-phase ac susceptibility of the [Tb4Cu1] complex exhibited anomalous frequency- dependence below 4 K, indicating blocking behavior potentially related to a single-molecule magnet.

AB - Complexation of LnIII(hfac)3, Ln III(OAc)3, and [CuII(dmg)2] 2- in the presence of Ph4P+ gave [Ln 4Cu1]-type pentanuclear complexes (dmg = dimethylglyoximate dianion; Ln = La, Nd, Eu, Gd, Tb). Single-crystal X-ray diffraction analyses revealed that four Ln(IIl) ions formed a rectangular array around the copper ion at its inversion center. The [Ln4Cu 1] core structures are essentially the same regardless of the different Ln ions. From the magnetic susceptibility measurements, the Cu(dmg)2 dianion moiety has been shown to play a role of the ferrimagnetic coupler among the Gd spins. The out-of-phase ac susceptibility of the [Tb4Cu1] complex exhibited anomalous frequency- dependence below 4 K, indicating blocking behavior potentially related to a single-molecule magnet.

KW - Lanthanide

KW - Magnetic measurements

KW - Molecule-based magnet

KW - Rare earth metal

KW - Single-molecule magnet

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U2 - 10.1016/j.synthmet.2005.07.055

DO - 10.1016/j.synthmet.2005.07.055

M3 - Article

AN - SCOPUS:24644496253

SN - 0379-6779

VL - 154

SP - 217

EP - 220

JO - Synthetic Metals

JF - Synthetic Metals

IS - 1-3

ER -

Nano-sized tetralanthanoid-copper complex ions containing oximato bridges

Abstract

Keywords

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