Control of the Single-Molecule Magnet Behavior of Lanthanide-Diarylethene Photochromic Assemblies by Irradiation with Light

Dawid Pinkowicz, Min Ren, Li Min Zheng, Saki Sato, Miki Hasegawa, Masakazu Morimoto, Masahiro Irie, Brian K. Breedlove, Goulven Cosquer, Keiichi Katoh, Masahiro Yamashita

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

Lanthanide-based extended coordination frameworks showing photocontrolled single-molecule magnet (SMM) behavior were prepared by combining highly anisotropic DyIIIand HoIIIions with the carboxylato-functionalized photochromic molecule 1,2-bis(5-carboxyl-2-methyl-3-thienyl)perfluorocyclopentene (H2dae), which acts as a bridging ligand. As a result, two new compounds of the general formula [{LnIII2(dae)3(DMSO)3(MeOH)}⋅10 MeOH]n(M=Dy for 1 a and Ho for 2) and two additional pseudo-polymorphs [{DyIII2(dae)3(DMSO)3(H2O)}⋅x MeOH]n(1 b) and [{DyIII2(dae)3(DMSO)3(DMSO)}⋅x MeOH]n(1 c) were obtained. All four compounds have 2D coordination-layer topologies, in which carboxylate-bridged Ln2units are linked together by dae2−anions into grid-like frameworks. All four compounds exhibited a strong reversible photochromic response to UV/Vis light. Moreover, both 1 a and 2 show field-induced SMM behavior. The slow magnetic relaxation of 1 a is influenced by the photoisomerization reaction leading to the observation of the cross-effect: photocontrolled SMM behavior.

Original languageEnglish
Pages (from-to)12502-12513
Number of pages12
JournalChemistry - A European Journal
Volume20
Issue number39
DOIs
Publication statusPublished - 2014 Sep 22

Keywords

  • lanthanides
  • layered compounds
  • magnetic properties
  • photochromism
  • single-molecule magnets

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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