4-Triazolyl-dipicolinic acids, prepared efficiently by CuAAC, proved to act as efficient antennae for optical lanthanide probes containing Eu(3+) or Tb(3+), under linear and non linear excitations (one, two and three photons provided by laser induced luminescence). The versatility offered by the substitution of the triazole subunit is, in addition, useful for covalent linkage to slide glass providing luminescent films.
Copper(I)‐catalysed azide–alkyne cycloaddition (CuAAC) has been successfully conducted under reductant‐free conditions. The catalytic system consisted of a combination of a copper(I)–N‐heterocyclic carbene complex and aromatic N‐donors. The catalyst is stable and can be stored, thus rendering the reaction valuable for routine use.
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