About the cover

January 2018 Volume 10 No 1

Accumulating multiple redox equivalents at catalytic sites is crucial to driving light-initiated multiple-electron-transfer reactions such as water splitting. However, generating and observing catalytic centres that have been reduced or oxidized twice under diffuse illumination is not a trivial task because of detrimental charge-recombination reactions. Now Hsiang-Yun Chen and Shane Ardo show that, on excitation with low-intensity visible light, a molecular proxy for a multiple-electron-transfer electrocatalyst can be oxidized twice by Ru—polypyridyl dye molecules when anchored to a titania film. This is depicted on the cover with the brown and red spheres representing the dye and proxy catalyst molecules, respectively.

Article p17; News & Views p3

IMAGE: DARIUS SIWEK

COVER DESIGN: TULSI VORALIA