Cover Picture: Survival of the Fittest Nanojar: Stepwise Breakdown of Polydisperse Cu27−Cu31 Nanojar Mixtures into Monodisperse Cu27(CO3) and Cu31(SO4) Nanojars (Chem. Eur. J. 16/2016)

A series of five homologous nanojars of different sizes, based solely on copper, hydroxide, and pyrazolate ions, self‐assemble around templating oxoanions with large hydration energies (e.g., carbonate, sulfate). Ammonia selectively breaks down and converts four of the five species into one single nanojar, providing an efficient preparation method for an otherwise difficult to obtain pure nanojar species. More information can be found in the Communication by G. Mezei, et al. on page 5499 ff.