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Modelling the luminescence of iridium cyclometalated complexes encapsulated in cucurbituril

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Abstract

Iridium(III) cyclometalated complexes in aqueous solution often display relatively weak luminescence. It has been shown in previous work that this emission can be significantly enhanced (by up to two orders of magnitude) by encapsulation in cucurbit[10]uril (Q[10]). Luminescence lifetime measurements suggest a dynamic self-quenching mechanism is active, possibly due to displacement of an excited guest complex via collision with an unbound complex. We devise a model for the association of a group of iridium(III) cyclometalated complexes with Q[10]. The model parameters are then fitted to steady-state emission titration curves. The excellent agreement of experimental data with the model provides valuable mechanistic information relating to the way this class of metal complexes interact and associate with the Q[10] host.

Graphical abstract: Modelling the luminescence of iridium cyclometalated complexes encapsulated in cucurbituril

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Publication details

The article was received on 03 Oct 2017, accepted on 04 Dec 2017 and first published on 04 Dec 2017


Article type: Paper
DOI: 10.1039/C7AN01632H
Citation: Analyst, 2018, Advance Article
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    Modelling the luminescence of iridium cyclometalated complexes encapsulated in cucurbituril

    L. R. Alrawashdeh, M. P. Cronin, A. I. Day, L. Wallace and C. E. Woodward, Analyst, 2018, Advance Article , DOI: 10.1039/C7AN01632H

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