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. 2020 Jun 12;8:458. doi: 10.3389/fchem.2020.00458

Figure 10.

Figure 10

(A,B) pH induced switchable CPL based on pyridine N- atom. (C) deprotonation of aromatic carboxylic acid. (D) protonation of tertiary amine. (A) Reproduced with permission (Sakai et al., 2016). Copyright 2016, Royal Society of Chemistry. (B) Reproduced with permission (Saleh et al., 2015). Copyright 2015, John Wiley and Sons. (C) Reproduced with permission (Pascal et al., 2016). Copyright 2016, Royal Society of Chemistry. (D) Reproduced with permission (Han D. et al., 2018). Copyright 2018, Royal Society of Chemistry.