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An unforeseen polymorph of coronene by the application of magnetic fields during crystal growth

Author

Listed:
  • Jason Potticary

    (Complex Functional Materials Group, School of Chemistry, University of Bristol)

  • Lui R. Terry

    (Complex Functional Materials Group, School of Chemistry, University of Bristol)

  • Christopher Bell

    (School of Physics, HH Wills Physics Laboratory, Tyndall Avenue)

  • Alexandros N. Papanikolopoulos

    (High Field Magnet Laboratory (HFML-EMFL), Radboud University)

  • Peter C. M. Christianen

    (High Field Magnet Laboratory (HFML-EMFL), Radboud University)

  • Hans Engelkamp

    (High Field Magnet Laboratory (HFML-EMFL), Radboud University)

  • Andrew M. Collins

    (Bristol Centre for Functional Nanomaterials, HH Wills Physics Laboratory)

  • Claudio Fontanesi

    (University of Bath, Claverton Down
    Universita’ di Modena e Reggio Emilia)

  • Gabriele Kociok-Köhn

    (University of Bath, Claverton Down)

  • Simon Crampin

    (University of Bath, Claverton Down)

  • Enrico Da Como

    (University of Bath, Claverton Down)

  • Simon R. Hall

    (Complex Functional Materials Group, School of Chemistry, University of Bristol)

Abstract

The continued development of novel drugs, proteins, and advanced materials strongly rely on our ability to self-assemble molecules in solids with the most suitable structure (polymorph) in order to exhibit desired functionalities. The search for new polymorphs remains a scientific challenge, that is at the core of crystal engineering and there has been a lack of effective solutions to this problem. Here we show that by crystallizing the polyaromatic hydrocarbon coronene in the presence of a magnetic field, a polymorph is formed in a β-herringbone structure instead of the ubiquitous γ-herringbone structure, with a decrease of 35° in the herringbone nearest neighbour angle. The β-herringbone polymorph is stable, preserves its structure under ambient conditions and as a result of the altered molecular packing of the crystals, exhibits significant changes to the optical and mechanical properties of the crystal.

Suggested Citation

  • Jason Potticary & Lui R. Terry & Christopher Bell & Alexandros N. Papanikolopoulos & Peter C. M. Christianen & Hans Engelkamp & Andrew M. Collins & Claudio Fontanesi & Gabriele Kociok-Köhn & Simon Cra, 2016. "An unforeseen polymorph of coronene by the application of magnetic fields during crystal growth," Nature Communications, Nature, vol. 7(1), pages 1-7, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11555
    DOI: 10.1038/ncomms11555
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