Probing the chemical structure of monolayer covalent-organic frameworks grown via Schiff-base condensation reactions.

نویسندگان

  • Ya Hu
  • Niall Goodeal
  • Ying Chen
  • Alex M Ganose
  • Robert G Palgrave
  • Hugo Bronstein
  • Matthew O Blunt
چکیده

Two-dimensional covalent-organic frameworks (2D-COFs) on surfaces offer a facile route to new 2D materials. Schiff-base condensation reactions have proven to be an effective fabrication route for such materials. We present scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS) studies of porphyrin 2D-COFs grown at a solid-vapour interface. XPS shows that covalent links between porphyrins consist of a mixture of imines and hemiaminals, a non-conjugated intermediate in the Schiff-base condensation reaction. These results demonstrate that environmental conditions during growth can have an important impact on the chemical composition of Schiff-base 2D-COFs.

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عنوان ژورنال:
  • Chemical communications

دوره 52 64  شماره 

صفحات  -

تاریخ انتشار 2016