Luminescence and structural properties of ZnO nanoparticles.

An efficient, environmentally benign isocyanide-based domino protocol is presented for synthesizing spiroheterocycles with 2-amino benzothiazole/1,3,4-thiadiazole, cyclohexyl/tert-butyl isocyanides and isatines/cyclic carbonyls, catalyzed by recyclable nanocrystalline TiO₂.

An efficient and environmentally sustainable domino protocol has been presented for the synthesis of structurally diverse spiroannulated pyrimidophenazines using erbium doped TiO ₂ nanoparticles as a recyclable and reusable heterogeneous acid catalyst.