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Complexation between Methyl Viologen (Paraquat) Bis(Hexafluorophosphate) and Dibenzo[24]Crown-8 Revisited. (T. B. Gasa, J. M. Spruell, W. R. Dichtel, T. J. Sørensen, D. Philp, J. F. Stoddart, P. Kuzmic), Chem. Eur. J. 200915, 106-116.
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