Synthesis, X-ray structure and reactivity of a sterically protected azobisphenol ligand: On the quest for new multifunctional active ligands

Emi Evangelio, Javier Saiz-Poseu, Daniel Maspoch, Klaus Wurst, Felix Busque, Daniel Ruiz-Molina

Research output: Contribution to journalArticleResearchpeer-review

9 Citations (Scopus)

Abstract

Different synthetic routes have been explored for the synthesis of the sterically protected 2,2′-dihydroxy-4,3,4,3′-tetra-tert- butylazobenzene ligand (2), which is an excellent candidate for the development of valence tautomeric complexes. As expected, such a ligand exhibits good reactivity with transition-metal ions, as shown by the synthesis and characterization of the new cobalt complex [Co(22-)(H 2O)3]Cl· 2.5EtOH·H2O (8). This fact together with the reversible deprotonation/ protonation of the phenol groups has been used to create a chromophoric array of three states with significantly different colours, which can interconvert reversibly between them. © Wiley-VCH Verlag GmbH & Co. KGaA, 2008.
Original languageEnglish
Pages (from-to)2278-2285
JournalEuropean Journal of Inorganic Chemistry
Issue number14
DOIs
Publication statusPublished - 1 Jan 2008

Keywords

  • Acid-base behaviour
  • Azobisphenol ligand
  • Chromophores
  • Multifunctional ligands
  • Valence tautomerism

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