Intramolecular φ-stacking in a phenylpyrazole-based iridium complex and its use in light-emitting electrochemical cells

Rubén D. Costa, Enrique Ortí, Henk J. Bolink, Stefan Graber, Catherine E. Housecroft, Edwin C. Constable

Research output: Contribution to journalArticle

117 Citations (Scopus)

Abstract

A novel iridium(III) complex, [Ir(dmppz)2pbpy][PF6] (Hdmppz = 3,5-dimethyl-1-phenylpyrazole and pbpy = 6-phenyl-(2,2′- bipyridine)), is reported. The complex shows an intramolecular face-to-face --stacking between the phenyl ring of the dmppz ligand and the pendant phenyl of the pbpy ligand. This interaction provides a supramolecular cage formation that holds also in the excited states. Light-emitting electrochemical cells (LECs) using the novel complex show extraordinary lifetimes of -2000 h. The high stability is favored by the presence of pendant methyl groups on the dmppz ligands that hinder the entrance of water molecules rendering the degradation of the complex more difficult.

Original languageEnglish
Pages (from-to)5978-5980
Number of pages3
JournalJournal of the American Chemical Society
Volume132
Issue number17
DOIs
Publication statusPublished - 2010 May 5
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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