18. Synthesis of Dibromoindigo Isomers

Stephanie Nahhas Butler University
Faculty Sponsor(s): Anne Wilson Butler University
Within the field of art conservation, it is necessary to verify the components and composition of certain pigments within artifacts. Tyrian purple is a valuable purple dye that was historically isolated from snails, gastropod mollusks. The synthesis of tyrian purple and its isomers is explored in order to authenticate pigments used on two mid-20th century Japanese yukata held by the Indianapolis Museum of Art at Newfields. Through halogenation, nucleophilic substitution, an aldol condensation reaction, and purification techniques, four isomers of Tyrian purple were synthesized; the most successful being most successful isomers with that of 4,4’-dibromoindigo and 7,7’-dibromoindigo.
Chemistry
Poster Presentation

When & Where

Irwin Library 1st Floor