How Corrole Layers Form at the Solid/Liquid Interface

  • Author: Chemistry – A European Journal
  • Published Date: 07 December 2018
  • Source / Publisher: Chemistry – A European Journal/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
thumbnail image: How Corrole Layers Form at the Solid/Liquid Interface

Related Societies

Corrole is an aromatic tetrapyrrole. Corrole derivatives have been used in many applications at the solid–liquid interface such as catalysis and sensing. In most of these applications, the controlled deposition of corrole layers is important, because this step is fundamental to tune the behavior of the macrocycle for the target function. Although the structural arrangement of the molecular layers in contact with the liquid is of fundamental interest, studies of such corrole layers have been rare.

Beatrice Bonanni, University of Rome "Tor Vergata", Italy, and colleagues have investigated the deposition of the water‐soluble phosphorus complex of a 2‐sulfonato‐10‐(4‐sulfonatophenyl)‐5,15‐dimesitylcorrole onto an Au(111) surface. The team used scanning tunneling microscopy (STM) to monitor the layer formation in situ (pictured).

The researchers found that the corrole molecules arrange flat on gold. There were significant differences in the morphology of corrole layers formed in the presence of liquid and those deposited after solvent evaporation. At the solid–liquid interface, the compound forms plateau-like clusters with stable surface coverage in the range of 65–75 % at higher concentrations. When the solvent was evaporated (as for drop-casting deposition), the coating of gold was less effective and less stable during repetitive scans.

The team also verified that corrole molecules preserve their redox functionality after adsorption on the gold substrate. This is significant for possible applications of these corrole layers as surface coatings in solution, e.g., for the sanitization of water tanks.


Article Views: 1233

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from, please contact us first for permission. more

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH