The functionalization of bentonite by intercalation of surfactants dodecylamine, hexadecylamine, octadecylamine, and the octadecyltrimethylammonium cation is described. Products are characterized by elemental analysis, thermal analysis, FT–IR spectra, and powder X-ray diffraction analysis. Laminar amine-clay nanocomposites contain about one mol amine per (Si,Al)4 clay unit, while the cationic s...

FeII- and α-ketoglutarate-dependent halogenases oxygenases can catalyze site-selective functionalization of C−H bonds via a variety C−X bond forming reactions, but achieving high chemoselectivity for using non-native functional groups remains rare. The current study shows that directed evolution be used to engineer variants the dioxygenase SadX address this challenge. Site-selective azidation s...