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- Title
Control of the Single-Molecule Magnet Behavior of Lanthanide-Diarylethene Photochromic Assemblies by Irradiation with Light.
- Authors
Pinkowicz, Dawid; Ren, Min; Zheng, Li ‐ Min; Sato, Saki; Hasegawa, Miki; Morimoto, Masakazu; Irie, Masahiro; Breedlove, Brian K.; Cosquer, Goulven; Katoh, Keiichi; Yamashita, Masahiro
- Abstract
Lanthanide-based extended coordination frameworks showing photocontrolled single-molecule magnet (SMM) behavior were prepared by combining highly anisotropic DyIII and HoIII ions 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 Ln2 units 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.
- Subjects
SINGLE molecule magnets; RARE earth metal analysis; IRRADIATION; LIGANDS (Chemistry); CHEMICAL formulas; PHOTOISOMERIZATION
- Publication
Chemistry - A European Journal, 2014, Vol 20, Issue 39, p12502
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201402647