“…42 Our recent research has highlighted the emergence of bio-inspired pseudopeptides as cutting-edge soft materials, demonstrating impressive capabilities in recognizing various metal ions and supramolecular self-assembly. 43,44 Here, we report a new class of chiral pseudopeptide-based probes (2S,2′S)-N,N'-(1,3-phenylenebis(methylene))bis(2-(((E)-4-(diethylamino)-2-hydroxybenzylidene)amino)-3-methylbutanamide) (4) and (2S,2′S)-N,N′-(1,3-phenylenebis(methylene))bis(2-(((Z)-4-(diethylamino)-2-hydroxybenzylidene)amino)-3-phenylpropanamide) (5) 45 containing m-xylylenediamine as an aromatic linker between two amino acid units (Scheme 1). 4 exhibits selective detection of Cu(II) ions through the inhibition of the ESIPT mechanism.…”