Hariharan, P. S., Mariyatra, M. B., Mothi, E. M., Neels, A., Rosair, G., & Anthony, S. P. (2017). Polymorphism and benzene solvent controlled stimuli responsive reversible fluorescence switching in triphenylphosphoniumfluorenylide crystals. New Journal of Chemistry, 41(11), 4592-4598. https://doi.org/10.1039/C7NJ01136A