These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
2 files

Host-Guest Interactions on Electrode Surfaces for Immobilization of Molecular Catalysts

revised on 24.09.2020, 04:53 and posted on 24.09.2020, 06:53 by Laurent Sévery, Jacek Szczerbiński, Mert Taskin, Isik Tuncay, Fernanda Brandalise Nunes, Chiara Cignarella, Gabriele Tocci, Olivier Blacque, Juerg Osterwalder, Renato Zenobi, Marcella Iannuzzi, David Tilley
The strategy of anchoring molecular catalysts on electrode surfaces combines the high selectivity and activity of molecular systems with the practicality of heterogeneous systems. The stability of molecular catalysts is, however, far less than that of traditional heterogeneous electrocatalysts, and therefore a method to easily replace anchored molecular catalysts that have degraded could make such electrosynthetic systems more attractive. Here, we apply a non-covalent “click” chemistry approach to reversibly bind molecular electrocatalysts to electrode surfaces via host-guest complexation with surface-anchored cyclodextrins. The host-guest interaction is remarkably strong and allows the flow of electrons between the electrode and the guest catalyst. Electrosynthesis in both organic and aqueous media was demonstrated on metal oxide electrodes, with stability on the order of hours. The catalytic surfaces can be recycled by controlled release of the guest from the host cavities and readsorption of fresh guest. This strategy represents a new approach to practical molecular-based catalytic systems.


Email Address of Submitting Author


University of Zurich



ORCID For Submitting Author


Declaration of Conflict of Interest

There are no conflicts to declare.



Logo branding