High performance optical oxygen sensors based on iridium complexes exhibiting interchromophore energy shuttling Medina Rodríguez, Santiago A. Denisov, Sergey Cudré, Yanouk Male, Louise Marín-Suárez, Marta Fernández-Gutiérrez, Alberto Fernández Sánchez, Jorge Fernando Tron, Arnaud Jonusauskas, Gediminas D. McClenaghan, Nathan Baranoff, Etienne 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. 2024-10-07T07:12:42Z 2024-10-07T07:12:42Z 2016-04-14 journal article Medina Rodríguez, S. et .al. Analyst, 2016, 141, 3090–3097. [https://doi.org/10.1039/C6AN00497K] https://hdl.handle.net/10481/95584 10.1039/C6AN00497K eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional Royal Society of Chemistry