High performance optical oxygen sensors based on iridium complexes exhibiting interchromophore energy shuttling

Research output: Contribution to journalArticlepeer-review

Authors

  • Santiago Medina-rodríguez
  • Sergey A. Denisov
  • Louise Male
  • Marta Marín-suárez
  • Alberto Fernández-gutiérrez
  • Jorge F. Fernández-sánchez
  • Arnaud Tron
  • Gediminas Jonusauskas
  • Nathan D. Mcclenaghan

Colleges, School and Institutes

Abstract

A doubly pyrene-grafted bis-cyclometallated iridium complex with engineered electronically excited states demonstrates reversible electronic energy transfer between adjacent chromophores giving rise to extremely long-lived red luminescence in solution (τ = 480 μs). Time-resolved spectroscopic studies afforded determination of pertinent photophysical parameters including rates of energy transfer and energy distribution between constituent chromophores in the equilibrated excited molecule (ca. 98% on the organic chromophores). Incorporation into a nanostructured metal–oxide matrix (AP200/19) gave highly sensitive O2 sensing films, as the detection sensitivity was 200–300% higher than with the commonly used PtTFPP and approaches the sensitivity of the best O2-sensing dyes reported to date.

Details

Original languageEnglish
Pages (from-to)3090-3097
JournalThe Analyst
Volume141
Issue number10
Early online date14 Apr 2016
Publication statusPublished - 21 May 2016