Room-temperature combinatorial screening of cyclometallated iridium(III) complexes for a step towards molecular control of colour purity

Research output: Contribution to journalArticlepeer-review


  • Etienne Baranoff
  • Il Jung
  • Rosario Scopelliti
  • Euro Solari
  • Michael Grätzel
  • Md Khaja Nazeeruddin

Colleges, School and Institutes

External organisations

  • Ecole Polytechnique Federale de Lausanne
  • Swiss Federal Institute of Technology
  • Downtown Station


A library of emission spectra of 90 bis-cyclometallated iridium complexes has been obtained using a simple combinatorial approach performed at room temperature. Trends in emission maxima are rationalized using Hammett parameters and invoking inter ligand energy transfer (ILET) processes. The screening approach allowed us to observe trends in the broadness of emission spectra opening the way for a rational approach to the engineering of the emission colour purity at a molecular level. Finally limitations to the screening strategy are discussed using a case study that involves two different monodentate ligands.


Original languageEnglish
Pages (from-to)6860-6867
Number of pages8
JournalDalton Transactions
Issue number26
Publication statusPublished - 14 Jul 2011

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