Pinto, S. M., Burrows, H. D., Pereira, M. M., Fonseca, S. M., Dias, F. B., Mallavia, R., & Tapia, M. J. (2009). Singlet-singlet energy transfer in self-assembled systems of the cationic poly{9,9-bis[6-N,N,N-trimethylammonium)hexyl]fluorene-co-1,4-phenylene} with oppositely charged porphyrins. Journal of Physical Chemistry B (Soft Condensed Matter and Biophysical Chemistry), 113(50), 16093-100. https://doi.org/10.1021/jp904959h