Organic 2D Materials Made by Self-Assembly

  • ChemPubSoc Europe Logo
  • Author: ChemNanoMat
  • Published Date: 16 February 2019
  • Source / Publisher: ChemNanoMat/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
thumbnail image: Organic 2D Materials Made by Self-Assembly

Organic two-dimensional materials have applications in optoelectronics, catalysis, and biomedicine. The construction of such materials by supramolecular self-assembly is a useful approach because of the wide variety of possible building blocks and the precise structural control.


Liu Yu, Chen Yong and colleagues, Nankai University, Tianjin, China, have synthesized a highly ordered organic two-dimensional microplate assembly made of the macrocyclic host cucurbit[8]uril and an aromatic guest, i.e., a central phenanthroline moiety with two terminal 4,4'-bipyridin-1-ium units. The team combined the two components in equimolar amounts in an aqueous solution, which was then air-dried to give square microplates (pictured).


The material has peculiar electrical properties: It only conducts electricity one way and acts as a rectifier. The team found that the self-assembled microplate displays a good conductivity under forward bias, but is nearly nonconductive under reverse bias along the stacking direction. The ambipolar transport might arise from the small bandgap of the organic semiconductor material.


 

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