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Issue 16, 2014
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Kinetic insight into bimolecular upconversion: experiment and simulation

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Abstract

We demonstrate a transient rate model for photochemical upconversion that links the internal energy transfer and triplet–triplet annihilation processes to spectroscopically measurable quantities, such as delayed fluorescence and bleaching. We confirm that our model is able to reproduce published delayed fluorescence measurements extremely well. We then use transient absorption spectroscopy to directly observe the dynamics of triplet populations through clear observation of delayed bleaching of the emitter species, providing direct evidence of triplet energy transfer from sensitiser to emitter molecules. This more complex experiment is also well reproduced by our model.

Graphical abstract: Kinetic insight into bimolecular upconversion: experiment and simulation

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Publication details

The article was received on 22 Nov 2013, accepted on 13 Jan 2014 and first published on 14 Jan 2014


Article type: Paper
DOI: 10.1039/C3RA46953K
Author version available: Download Author version (PDF)
Citation: RSC Adv., 2014,4, 8059-8063
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    Kinetic insight into bimolecular upconversion: experiment and simulation

    R. B. Piper, M. Yoshida, D. J. Farrell, T. Khoury, M. J. Crossley, T. W. Schmidt, S. A. Haque and N. J. Ekins-Daukes, RSC Adv., 2014, 4, 8059
    DOI: 10.1039/C3RA46953K

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