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A supramolecular chain of dimeric Dy single molecule magnets decorated with azobenzene ligands.
Huang, Gang; Yi, Xiaohui; Gendron, Frederic; Le Guennic, Boris; Guizouarn, Thierry; Daiguebonne, Carole; Calvez, Guillaume; Suffren, Yan; Guillou, Olivier; Bernot, Kevin.
Afiliação
  • Huang G; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F 35000 Rennes, France. kevin.bernot@insa-rennes.fr.
  • Yi X; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F 35000 Rennes, France. kevin.bernot@insa-rennes.fr.
  • Gendron F; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F 35000 Rennes, France. kevin.bernot@insa-rennes.fr.
  • Le Guennic B; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F 35000 Rennes, France. kevin.bernot@insa-rennes.fr.
  • Guizouarn T; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F 35000 Rennes, France. kevin.bernot@insa-rennes.fr.
  • Daiguebonne C; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F 35000 Rennes, France. kevin.bernot@insa-rennes.fr.
  • Calvez G; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F 35000 Rennes, France. kevin.bernot@insa-rennes.fr.
  • Suffren Y; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F 35000 Rennes, France. kevin.bernot@insa-rennes.fr.
  • Guillou O; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F 35000 Rennes, France. kevin.bernot@insa-rennes.fr.
  • Bernot K; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F 35000 Rennes, France. kevin.bernot@insa-rennes.fr.
Dalton Trans ; 48(42): 16053-16061, 2019 Nov 14.
Artigo em Inglês | MEDLINE | ID: mdl-31612893
ABSTRACT
We report the synthesis, ab initio calculations, magnetic and optical characterization of a DyIII-based dimeric compound named DyAZO. The dimers self-organize into a supramolecular chain decorated with photo-isomerizable azobenzene ligands. DyAZO displays single-molecule magnet (SMM) behavior. However, ab initio calculations highlight a quite strong admixture of MJ states of the 6H15/2 level of DyIII ions, the presence of low-lying excited MJ states and antiferromagnetic Dy-Dy dipolar coupling. This favors zero-field fast tunneling. Accordingly the Dy-doped analogue YDyAZO (5.5% Dy doping) displays enhanced magnetic relaxation with a hysteresis that is observed at 0.5 K. The influence of the cis- to trans-isomerization of the decorating azobenzene ligand on magnetic properties has been tested for both solid samples and solutions of DyAZO and YDyAZO. This provides hints for the synthesis of future Dy-based photo-isomerizable molecules.

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: Dalton Trans Assunto da revista: Química Ano de publicação: 2019 Tipo de documento: Artigo País de afiliação: França