One-dimensional coordination polymers of antiferromagnetically-coupled [Mn4] single-molecule magnets

Lollita Lecren; Olivier Roubeau; Yang Guang Li; Xavier F. Le Goff; Hitoshi Miyasaka; Florent Richard; Wolfgang Wernsdorfer; Claude Coulon; Rodolphe Clérac

doi:10.1039/b715528j

One-dimensional coordination polymers of antiferromagnetically-coupled [Mn₄] single-molecule magnets

Lollita Lecren, Olivier Roubeau, Yang Guang Li, Xavier F. Le Goff, Hitoshi Miyasaka, Florent Richard, Wolfgang Wernsdorfer, Claude Coulon, Rodolphe Clérac

Materials Development Division

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

63 Citations (Scopus)

Abstract

Reactions of the rhombic [Mn^II₂Mn^III ₂(hmp)₆]⁴⁺ complex in acetonitrile with simple carboxylate ligands yield (i) three new isolated [Mn₄] complexes, namely [Mn₄(hmp)₆(CH₃COO)₂(H ₂O)₂](ClO₄)₂•4H₂O (1), [Mn₄(hmp)₆(CCl₃COO)₂(H ₂O)₂](ClO₄)₂ (2) and [Mn ₄(hmp)₆(C₆H₅COO)₂(H ₂O)₂](ClO₄)₂•4CH ₃CN•2H₂O (3) in the presence of either bulky carboxylate or of an excess of Mn(ii) source; and (ii) two 1D arrangements of [Mn₄] complexes connected through double syn-syn carboxylate bridges when using acetate and chloroacetate, namely {[Mn₄(hmp) ₆(CH₃COO)₂](ClO₄) ₂•H₂O}_n (4) and {[Mn₄(hmp) ₆(ClCH₂COO)₂](ClO₄) ₂•2H₂O}_n (5). The assembly of such building blocks can thus be controlled by an adequate choice of the bridging anion. As expected, the isolated [Mn₄] complexes behave as Single-Molecule Magnets as shown by the study of their static and dynamic magnetic properties. Detailed magnetic studies both on polycrystalline samples and single crystals show that the chain compounds are isolated antiferromagnetic chains. The slow relaxation of their staggered magnetization has been studied thanks to finite-size effects induced by the intrinsic defects of the material.

Original language	English
Pages (from-to)	755-766
Number of pages	12
Journal	Dalton Transactions
Issue number	6
DOIs	https://doi.org/10.1039/b715528j
Publication status	Published - 2008 Feb 7

ASJC Scopus subject areas

Inorganic Chemistry

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One-dimensional coordination polymers of antiferromagnetically-coupled [Mn₄] single-molecule magnets. / Lecren, Lollita; Roubeau, Olivier; Li, Yang Guang; Le Goff, Xavier F.; Miyasaka, Hitoshi; Richard, Florent; Wernsdorfer, Wolfgang; Coulon, Claude; Clérac, Rodolphe.

In: Dalton Transactions, No. 6, 07.02.2008, p. 755-766.

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

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title = "One-dimensional coordination polymers of antiferromagnetically-coupled [Mn4] single-molecule magnets",

abstract = "Reactions of the rhombic [MnII2MnIII 2(hmp)6]4+ complex in acetonitrile with simple carboxylate ligands yield (i) three new isolated [Mn4] complexes, namely [Mn4(hmp)6(CH3COO)2(H 2O)2](ClO4)2•4H2O (1), [Mn4(hmp)6(CCl3COO)2(H 2O)2](ClO4)2 (2) and [Mn 4(hmp)6(C6H5COO)2(H 2O)2](ClO4)2•4CH 3CN•2H2O (3) in the presence of either bulky carboxylate or of an excess of Mn(ii) source; and (ii) two 1D arrangements of [Mn4] complexes connected through double syn-syn carboxylate bridges when using acetate and chloroacetate, namely {[Mn4(hmp) 6(CH3COO)2](ClO4) 2•H2O}n (4) and {[Mn4(hmp) 6(ClCH2COO)2](ClO4) 2•2H2O}n (5). The assembly of such building blocks can thus be controlled by an adequate choice of the bridging anion. As expected, the isolated [Mn4] complexes behave as Single-Molecule Magnets as shown by the study of their static and dynamic magnetic properties. Detailed magnetic studies both on polycrystalline samples and single crystals show that the chain compounds are isolated antiferromagnetic chains. The slow relaxation of their staggered magnetization has been studied thanks to finite-size effects induced by the intrinsic defects of the material.",

author = "Lollita Lecren and Olivier Roubeau and Li, {Yang Guang} and {Le Goff}, {Xavier F.} and Hitoshi Miyasaka and Florent Richard and Wolfgang Wernsdorfer and Claude Coulon and Rodolphe Cl{\'e}rac",

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T1 - One-dimensional coordination polymers of antiferromagnetically-coupled [Mn4] single-molecule magnets

AU - Lecren, Lollita

AU - Roubeau, Olivier

AU - Li, Yang Guang

AU - Le Goff, Xavier F.

AU - Miyasaka, Hitoshi

AU - Richard, Florent

AU - Wernsdorfer, Wolfgang

AU - Coulon, Claude

AU - Clérac, Rodolphe

PY - 2008/2/7

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N2 - Reactions of the rhombic [MnII2MnIII 2(hmp)6]4+ complex in acetonitrile with simple carboxylate ligands yield (i) three new isolated [Mn4] complexes, namely [Mn4(hmp)6(CH3COO)2(H 2O)2](ClO4)2•4H2O (1), [Mn4(hmp)6(CCl3COO)2(H 2O)2](ClO4)2 (2) and [Mn 4(hmp)6(C6H5COO)2(H 2O)2](ClO4)2•4CH 3CN•2H2O (3) in the presence of either bulky carboxylate or of an excess of Mn(ii) source; and (ii) two 1D arrangements of [Mn4] complexes connected through double syn-syn carboxylate bridges when using acetate and chloroacetate, namely {[Mn4(hmp) 6(CH3COO)2](ClO4) 2•H2O}n (4) and {[Mn4(hmp) 6(ClCH2COO)2](ClO4) 2•2H2O}n (5). The assembly of such building blocks can thus be controlled by an adequate choice of the bridging anion. As expected, the isolated [Mn4] complexes behave as Single-Molecule Magnets as shown by the study of their static and dynamic magnetic properties. Detailed magnetic studies both on polycrystalline samples and single crystals show that the chain compounds are isolated antiferromagnetic chains. The slow relaxation of their staggered magnetization has been studied thanks to finite-size effects induced by the intrinsic defects of the material.

AB - Reactions of the rhombic [MnII2MnIII 2(hmp)6]4+ complex in acetonitrile with simple carboxylate ligands yield (i) three new isolated [Mn4] complexes, namely [Mn4(hmp)6(CH3COO)2(H 2O)2](ClO4)2•4H2O (1), [Mn4(hmp)6(CCl3COO)2(H 2O)2](ClO4)2 (2) and [Mn 4(hmp)6(C6H5COO)2(H 2O)2](ClO4)2•4CH 3CN•2H2O (3) in the presence of either bulky carboxylate or of an excess of Mn(ii) source; and (ii) two 1D arrangements of [Mn4] complexes connected through double syn-syn carboxylate bridges when using acetate and chloroacetate, namely {[Mn4(hmp) 6(CH3COO)2](ClO4) 2•H2O}n (4) and {[Mn4(hmp) 6(ClCH2COO)2](ClO4) 2•2H2O}n (5). The assembly of such building blocks can thus be controlled by an adequate choice of the bridging anion. As expected, the isolated [Mn4] complexes behave as Single-Molecule Magnets as shown by the study of their static and dynamic magnetic properties. Detailed magnetic studies both on polycrystalline samples and single crystals show that the chain compounds are isolated antiferromagnetic chains. The slow relaxation of their staggered magnetization has been studied thanks to finite-size effects induced by the intrinsic defects of the material.

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