Copper(II) thioxanthone carboxylate as a photoswitchable photocatalyst for photoinduced click chemistry

Dadashi-Silab S., Yagci Y.

TETRAHEDRON LETTERS, vol.56, no.46, pp.6440-6443, 2015 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 56 Issue: 46
  • Publication Date: 2015
  • Doi Number: 10.1016/j.tetlet.2015.09.155
  • Title of Journal : TETRAHEDRON LETTERS
  • Page Numbers: pp.6440-6443


A new efficient copper photocatalyst to photochemically induce the copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) reaction without the need for additional ligands is reported. The thioxanthone carboxylate moiety was combined with copper(II) ions by a simple ion exchange reaction to form a copper (II) thioxanthone carboxylate photocatalyst. In the catalytic process, intramolecular photoinduced electron transfer was stimulated to reduce copper(II) ions giving rise to a copper(I) species capable of catalyzing the CuAAC reaction. Temporal control over the click reaction was demonstrated by intermittent light on/off experiments. (C) 2015 Elsevier Ltd. All rights reserved.