Issue 16, 2014

Kinetic insight into bimolecular upconversion: experiment and simulation

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

Article information

Article type
Paper
Submitted
22 Nov 2013
Accepted
13 Jan 2014
First published
14 Jan 2014

RSC Adv., 2014,4, 8059-8063

Author version available

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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