Assembling an alkyl rotor to access abrupt and reversible crystalline deformation of a cobalt(II) complex.

نویسندگان

  • Sheng-Qun Su
  • Takashi Kamachi
  • Zi-Shuo Yao
  • You-Gui Huang
  • Yoshihito Shiota
  • Kazunari Yoshizawa
  • Nobuaki Azuma
  • Yuji Miyazaki
  • Motohiro Nakano
  • Goro Maruta
  • Sadamu Takeda
  • Soonchul Kang
  • Shinji Kanegawa
  • Osamu Sato
چکیده

Harnessing molecular motion to reversibly control macroscopic properties, such as shape and size, is a fascinating and challenging subject in materials science. Here we design a crystalline cobalt(II) complex with an n-butyl group on its ligands, which exhibits a reversible crystal deformation at a structural phase transition temperature. In the low-temperature phase, the molecular motion of the n-butyl group freezes. On heating, the n-butyl group rotates ca. 100° around the C-C bond resulting in 6-7% expansion of the crystal size along the molecular packing direction. Importantly, crystal deformation is repeatedly observed without breaking the single-crystal state even though the shape change is considerable. Detailed structural analysis allows us to elucidate the underlying mechanism of this deformation. This work may mark a step towards converting the alkyl rotation to the macroscopic deformation in crystalline solids.

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عنوان ژورنال:
  • Nature communications

دوره 6  شماره 

صفحات  -

تاریخ انتشار 2015