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. 2018 Jul 25;8:11220. doi: 10.1038/s41598-018-29152-9

Figure 3.

Figure 3

pH-dependent Chirality Inversion. (a) Circular dichroism (CD) spectra of NDI-L-Glu (1) (c = 10−5 M) at 3 to 9 pH range, and (b) the CD spectra of 0.5, 1.0 and 1.5 mM solution concentrations of 1 at pH 3 and 9. (c) CD spectra of 1 solution with cyclic switching between pH 3 and 9, and (d) changes in the CD signal intensity at 362 nm of NDI-L-Glu (1) in Robinson-Britton buffer solution upon pH changes between acidic (pH = 3.0) and alkaline (pH = 9.0) conditions, respectively.