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Issue 7, 2014
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Photocatalytic water oxidation at soft interfaces

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Abstract

Molecular water oxidation catalysts have been, for the first time, co-embedded with a photosensitizer into phospholipid membranes. The functionalized small unilamellar vesicles produce molecular oxygen by photocatalysis when irradiated with visible light in aqueous buffer. The two dimensional assembly of the catalysts at the lipid–water interface mimics photoactive membranes in biology and allows photocatalytic water oxidation at very low catalyst concentrations of 500 nM, which cannot be reached in homogeneous systems. Highest TONs are obtained below the membrane's main transition temperature indicating that phase separation, clustering and a limited dynamic enhance the photocatalytic activity of the assembly. The concept of membrane co-embedding can be applied to various combinations, ratios and concentrations of photosensitizers and water oxidizing catalysts, providing a new approach for artificial photosynthesis.

Graphical abstract: Photocatalytic water oxidation at soft interfaces

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Supplementary files

Article information


Submitted
07 Apr 2014
Accepted
01 May 2014
First published
01 May 2014

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2014,5, 2683-2687
Article type
Edge Article
Author version available

Photocatalytic water oxidation at soft interfaces

M. Hansen, F. Li, L. Sun and B. König, Chem. Sci., 2014, 5, 2683
DOI: 10.1039/C4SC01018C

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