Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 24, Pages 7080-7084Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201802423
Keywords
anthracene; magnetism; molecular crystals; photochemistry; photomechanical processes
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Funding
- National Science Foundation [DMR-1508099]
- King Abdullah International Medical Research Center (KAIMRC) [RC10/104]
- JSPS KAKENHI [JP16K17896]
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A surfactant-assisted seeded-growth method is used to form single-crystal platelets composed of 9-methylanthracene with two different internal molecular orientations. The more stable form exhibits a photoinduced twisting, as observed previously for 9-methylanthracene microribbons grown by the floating drop method. However, the newly discovered elongated hexagonal platelets undergo a photoinduced rolling-up and unrolling. The ability of the rolled-up cylindrical shape to trap superparamagnetic nanoparticles enables it to be carried along in a magnetic field gradient. The new photoinduced shape change, made possible by a novel surfactant-assisted crystal growth method, opens up the possibility of using light to modulate the crystal translational motion.
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