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. Author manuscript; available in PMC: 2018 Mar 23.
Published in final edited form as: Chemistry. 2017 Mar 6;23(17):4051–4054. doi: 10.1002/chem.201605452

Figure 2.

Figure 2

a) 1H NMR titration of 3 with TBA+Cl− at 298 K; [3] =0.4 mM in 10% water-saturated [D6]DMSO/CDCl3. b) 1H NMR titration of 4 with TBA+Br− at 298 K; [4] =1.0 mM in 10 % water-saturated [D6]DMSO/CDCl3. Peak assignments refer to labelled hydrogen atoms presented in Figure 1.