L. Tebben and A. Studer show in a Review how nitroxides can be used in synthesis and polymer chemistry. What reactions do they undergo other than oxidations and C–C couplings? In a Minireview, M. W.-L. Popp and H. L. Ploegh describe protein engineering by using sortase. In an Essay, A. Studer and D. P. Curran discuss what happens when organocatalysis and C–H activation meet radical and electron-transfer reactions. The Highlight deals with counterion pinning in conjugated polyelectrolytes for organic electronics (U. Scherf).

In the Communications section, C. Amatore et al. present a combination of amperometry and total internal reflection fluorescence microsopy for monitoring single exocytotic events (see also ChemViews magazine news). T. Skrydstrup et al. report a rare gold-catalyzed alkyne dimerization. J.-M. Basset et al. succeeded in stabilizing platinum nanoparticles with organosilyl groups. A. Villinger et al. observed an unusual isomerization to tetraazastiboles (see picture).

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