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

AuthorsEvangelio, Emi ; Saiz-Poseu, Javier ; Maspoch, Daniel ; Wurst, Klaus; Busqué, Félix; Ruiz Molina, Daniel
KeywordsAcid–base behaviour
Multifunctional ligands
Valence tautomerism
Azobisphenol ligand
Issue Date2008
PublisherJohn Wiley & Sons
CitationEuropean Journal of Inorganic Chemistry (14): 2278-2285 (2008)
AbstractDifferent synthetic routes have been explored for the synthesis of the sterically protected 2,2'-dihydroxy-4,3,4,3'-tetratert-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–)(H2O)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.
Identifiersdoi: 10.1002/ejic.200701339
issn: 1434-1948
e-issn: 1099-0682
Appears in Collections:(ICMAB) Artículos
(CIN2) Artículos
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