Dyads Containing Iridium(III) Bis-terpyridine as Photoactive Center: Synthesis and Electron Transfer Study

Research output: Contribution to journalArticlepeer-review

Authors

  • Etienne Baranoff
  • Isabelle M. Dixon
  • Jean Paul Collin
  • Jean Pierre Sauvage
  • Barbara Ventura
  • Lucia Flamigni

Colleges, School and Institutes

External organisations

  • Istituto per i Processi Chimico-Fisici del Consiglio Nazionale delle Ricerche (IPCF-CNR)
  • Lab. de Chimie Organo-Minerale
  • IN2P3
  • Institut Le Bel
  • Istituto ISOF-CNR
  • Lab. de Chimie de Coordination
  • UPR 8241 CNRS

Abstract

A series of Ir(III)-D dyads based on an iridium(III) bis-terpyridine complex as a photoactive center and tertiary amines as donor groups, as well as their individual components, have been designed to generate photoinduced charge separation. Depending on the donor group, a modular approach or a "chemistry-on-the-complex" approach has been used to prepare three different Ir(III)-D dyads. A detailed photophysical study has been performed on one Ir(III)-D dyad in which a triarylamine is linked to the iridium bis-terpyridine complex with an amido-phenyl group used as a spacer. In acetonitrile at room temperature, steady-state and time-resolved methods gave evidence of a photoinduced charge-separated state Ir--D+ with a lifetime of 70 ps. This relatively short lifetime could be due to the close proximity between the negative charge, likely localized in the bridging terpyridine, and the oxidized donor group.

Details

Original languageEnglish
Pages (from-to)3057-3066
Number of pages10
JournalInorganic Chemistry
Volume43
Issue number10
Publication statusPublished - 17 May 2004

ASJC Scopus subject areas