Figure 2 | Scientific Reports

Figure 2

From: Remarkable hexafunctional anion receptor with operational urea-based inner cleft and thiourea-based outer cleft: Novel design with high-efficiency for sulfate binding

Figure 2

(a) Partial 1H NMR spectra of L (2 mM) in the presence of 5 equivalents of different anions in DMSO-d 6 ; (b) partial 1HNMR titration of L showing changes in the NH chemical shifts of L (2 mM) with an increasing amount of SO4 2− (20 mM) in DMSO-d 6 . (H1 = CH2NHCO, H2 = CONHAr, H3 = ArNHCS, H4 = CSNHAr); and (c) proposed binding mechanism of L with SO4 2−.

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