Inside cover: Reversible photoisomerization of spiropyran on the surfaces of Au25 nanoclusters (ChemPhysChem 12/2016) The Inside Cover picture illustrates the fluorescent properties of a gold nanocluster functionalized with several copies of a red-emitting merocyanine (image by Ella Marushchenko). The red fluorescence can be turned on and off reversibly by using an external stimulus. 17 12 1711-1711 1711-1711 Wiley