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. Author manuscript; available in PMC: 2011 Aug 11.
Published in final edited form as: Tetrahedron Lett. 2010 Aug 11;51(32):4233–4236. doi: 10.1016/j.tetlet.2010.06.036

Figure 3.

Figure 3

1H NMR titration curves for sulfate binding with H6L(OTs)6 in D2O at pH = 2.1. Net changes in the chemical shifts of a = NCH3, b = NCH2 and c = NCH2CH2 are shown against the anion concentration.