together with water molecules. The dipeptide–palladium(II) conjugatedcomplex 1 was studied as a metalloreceptor through metal coordination to accommodate a guest ligand, 4-aminopyridine, resulting in the formation of the dipeptide–palladium(II) conjugatedcomplex [(L1)Pd(4APy)] (2). Each preorganized helical molecule of 2 is packed in a right-handed helical-like molecular arrangement in the crystal packing