Journal article
Morphological Evolution and Singlet Fission in Aqueous Suspensions of TIPS-Pentacene Nanoparticles
MJY Tayebjee, KN Schwarz, RW MacQueen, M Dvořák, AWC Lam, KP Ghiggino, DR McCamey, TW Schmidt, GJ Conibeer
Journal of Physical Chemistry C | Published : 2016
Abstract
We report the observation of singlet fission in aqueous suspensions of 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-Pn) nanoparticles (NPs) synthesized using the reprecipitation method. By altering the synthesis conditions we are able to fabricate NPs which evolve from a system of poorly coupled to highly coupled chromophores. This morphological evolution can also be suppressed for a period of several months. Absorption spectra confirm that the particles evolve over time, displaying increased intermolecular interaction, if the initial reaction conditions seeded a polycrystalline sample. We correlate these differences in morphologies to different rates of singlet state decay, where high..
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Grants
Awarded by Australian Research Council
Funding Acknowledgements
The authors would like to acknowledge the Biological Resources Imaging Laboratory Unit and the Electron Microscope Unit within the Mark Wainwright Analytical Centre at the University of New South Wales for DLS and AFM support. This program has been supported by the Australian Government through the Australian Renewable Energy Agency (ARENA). M.J.Y.T., R.W.M., and M.D. acknowledge receipt of ARENA Postdoctoral Fellowships. K.N.S acknowledges ARENA for a postgraduate scholarship. T.W.S. and D.R.M. acknowledge the Australian Research Council for Future Fellowships (FT130100177, FT130100214). This work was supported by an Australian Research Council Discovery Project (DP110103300).