Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 28, Pages 8577-8581Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201804102
Keywords
anthracene; dysprosium; photocycloaddition; single-molecule magnets; white light
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Funding
- National Key R&D Program of China [2017YFA0303203]
- National Natural Science Foundation of China [21731003, 11774178]
- CNRS, France
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In search of magneto-optic materials, the mononuclear compounds Ln(III)(depma)(NO3)(3)(hmpa)(2) (Ln=Dy, Gd) were synthesized. The anthracene moieties undergo [4+4] dimerization when irradiated at 365nm without loss of crystallinity. The Dy compound switches from a single-ion to a single-molecule magnet with doubling of the spin reversal barrier energy and from yellow-green to blue-white emission. The dimerization is reversed by heating at 100 degrees C or partially on light irradiating at 254nm. The results suggest that lanthanide phosphonates with anthracene are promising smart materials displaying synergistic magneto-optic property.
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