Fig. 4. NMR spectroscopic evidence for the formation of SL8+. (a) 1H NMR, (b) DOSY and (c) HOESY spectra of a solution (MeOD : D2O : CD3CN, 1 : 1 : 1) of [2]C4+, TK6+ and [SL(OTf)]7+ at 500 MHz and 298 K.
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