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Issue 10, 2016
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High performance optical oxygen sensors based on iridium complexes exhibiting interchromophore energy shuttling

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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.

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

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Supplementary files

Article information


Submitted
29 Feb 2016
Accepted
14 Apr 2016
First published
14 Apr 2016

This article is Open Access

Analyst, 2016,141, 3090-3097
Article type
Paper

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

S. Medina-Rodríguez, S. A. Denisov, Y. Cudré, L. Male, M. Marín-Suárez, A. Fernández-Gutiérrez, J. F. Fernández-Sánchez, A. Tron, G. Jonusauskas, N. D. McClenaghan and E. Baranoff, Analyst, 2016, 141, 3090
DOI: 10.1039/C6AN00497K

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