Metal-radical chains based on polychlorotriphenylmethyl radicals: Synthesis, structure, and magnetic properties

Nans Roques; Neus Domingo; Daniel Maspoch; Klaus Wurst; Concepció Rovira; Javier Tejada; Daniel Ruiz-Molina; Jaume Veciana

doi:10.1021/ic100037z

Metal-radical chains based on polychlorotriphenylmethyl radicals: Synthesis, structure, and magnetic properties

Nans Roques, Neus Domingo, Daniel Maspoch, Klaus Wurst, Concepció Rovira, Javier Tejada, Daniel Ruiz-Molina, Jaume Veciana

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

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Abstract

We report the synthesis, crystal structures, and magnetic properties of two new metal-radical chains built up from a new class of organic radical-based ligands, the polychlorinated triphenylmethyl (PTM) radicals. Crystal structures of two new 1D coordination polymers, [Cu₂(PTMDC)₂(Py) ₅(EtOH)] · 3EtOH (1) and [Co₂(PTMDC) ₂(DMF)₂(H₂O)₆] · 5DMF (2) (where PTMDC is a PTM radical functionalized with two carboxylic groups), show similar chain-like structures, In which each of the PTMDC radicals are connecting two Cu(II) or Co(II) metal ions. Therefore, from a magnetic point of view, both structures describe a magnetic chain model based on the PTMDC-M(II) unit. In this manuscript, the magnetic exchange coupling constants between both metal ions and the bridging PTM radicals have been determined. In both cases, the temperature dependence of the magnetic susceptibility reveals antiferromagnetic exchange coupling constants between the PTMDC radicals and Cu(II) (Jlk_B = -42 K) and Co(II) (J/k_B = -14.6 K) ions based on the exchange Hamiltonian H=-JσSA_iSA_i+1.

Original language	English
Pages (from-to)	3482-3488
Number of pages	7
Journal	Inorganic Chemistry
Volume	49
Issue number	7
DOIs	https://doi.org/10.1021/ic100037z
State	Published - Apr 5 2010
Externally published	Yes

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@article{94539287fd2748f78b934b5b23597f8c,

title = "Metal-radical chains based on polychlorotriphenylmethyl radicals: Synthesis, structure, and magnetic properties",

abstract = "We report the synthesis, crystal structures, and magnetic properties of two new metal-radical chains built up from a new class of organic radical-based ligands, the polychlorinated triphenylmethyl (PTM) radicals. Crystal structures of two new 1D coordination polymers, [Cu2(PTMDC)2(Py) 5(EtOH)] · 3EtOH (1) and [Co2(PTMDC) 2(DMF)2(H2O)6] · 5DMF (2) (where PTMDC is a PTM radical functionalized with two carboxylic groups), show similar chain-like structures, In which each of the PTMDC radicals are connecting two Cu(II) or Co(II) metal ions. Therefore, from a magnetic point of view, both structures describe a magnetic chain model based on the PTMDC-M(II) unit. In this manuscript, the magnetic exchange coupling constants between both metal ions and the bridging PTM radicals have been determined. In both cases, the temperature dependence of the magnetic susceptibility reveals antiferromagnetic exchange coupling constants between the PTMDC radicals and Cu(II) (JlkB = -42 K) and Co(II) (J/kB = -14.6 K) ions based on the exchange Hamiltonian H=-JσSAiSAi+1.",

author = "Nans Roques and Neus Domingo and Daniel Maspoch and Klaus Wurst and Concepci{\'o} Rovira and Javier Tejada and Daniel Ruiz-Molina and Jaume Veciana",

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doi = "10.1021/ic100037z",

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pages = "3482--3488",

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TY - JOUR

T1 - Metal-radical chains based on polychlorotriphenylmethyl radicals

T2 - Synthesis, structure, and magnetic properties

AU - Roques, Nans

AU - Domingo, Neus

AU - Maspoch, Daniel

AU - Wurst, Klaus

AU - Rovira, Concepció

AU - Tejada, Javier

AU - Ruiz-Molina, Daniel

AU - Veciana, Jaume

PY - 2010/4/5

Y1 - 2010/4/5

N2 - We report the synthesis, crystal structures, and magnetic properties of two new metal-radical chains built up from a new class of organic radical-based ligands, the polychlorinated triphenylmethyl (PTM) radicals. Crystal structures of two new 1D coordination polymers, [Cu2(PTMDC)2(Py) 5(EtOH)] · 3EtOH (1) and [Co2(PTMDC) 2(DMF)2(H2O)6] · 5DMF (2) (where PTMDC is a PTM radical functionalized with two carboxylic groups), show similar chain-like structures, In which each of the PTMDC radicals are connecting two Cu(II) or Co(II) metal ions. Therefore, from a magnetic point of view, both structures describe a magnetic chain model based on the PTMDC-M(II) unit. In this manuscript, the magnetic exchange coupling constants between both metal ions and the bridging PTM radicals have been determined. In both cases, the temperature dependence of the magnetic susceptibility reveals antiferromagnetic exchange coupling constants between the PTMDC radicals and Cu(II) (JlkB = -42 K) and Co(II) (J/kB = -14.6 K) ions based on the exchange Hamiltonian H=-JσSAiSAi+1.

AB - We report the synthesis, crystal structures, and magnetic properties of two new metal-radical chains built up from a new class of organic radical-based ligands, the polychlorinated triphenylmethyl (PTM) radicals. Crystal structures of two new 1D coordination polymers, [Cu2(PTMDC)2(Py) 5(EtOH)] · 3EtOH (1) and [Co2(PTMDC) 2(DMF)2(H2O)6] · 5DMF (2) (where PTMDC is a PTM radical functionalized with two carboxylic groups), show similar chain-like structures, In which each of the PTMDC radicals are connecting two Cu(II) or Co(II) metal ions. Therefore, from a magnetic point of view, both structures describe a magnetic chain model based on the PTMDC-M(II) unit. In this manuscript, the magnetic exchange coupling constants between both metal ions and the bridging PTM radicals have been determined. In both cases, the temperature dependence of the magnetic susceptibility reveals antiferromagnetic exchange coupling constants between the PTMDC radicals and Cu(II) (JlkB = -42 K) and Co(II) (J/kB = -14.6 K) ions based on the exchange Hamiltonian H=-JσSAiSAi+1.

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U2 - 10.1021/ic100037z

DO - 10.1021/ic100037z

M3 - Article

AN - SCOPUS:77950247200

SN - 0020-1669

VL - 49

SP - 3482

EP - 3488

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 7

ER -

Metal-radical chains based on polychlorotriphenylmethyl radicals: Synthesis, structure, and magnetic properties

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