Characterization of Anthraquinone-DerivedRedox Switchable Ionophores and Their Complexes with Li⁺, Na⁺, K⁺, Ca⁺, and Mg⁺ Metal Ions

Table 3

¹H NMR spectral data of alkali and alkaline earth metal complexes with ionophore V₂.

Ionophore	Complex	^1H NMR absorption bands [(δ ppm)]
V2		1.19–1.231 (CH3), 3.48–4.35 (CH2–O–CH2), 7.28–8.17 (Ar–H)
	V2LiPic	1.11–1.27 (CH3), 3.47–4.62 (CH2–O–CH2), 7.52–8.20 (Ar–H)
	V2NaPic	1.12–1.26 (CH3), 3.48–4.61 (CH2–O–CH2), 7.48–8.17 (Ar–H)
	V2KPic	1.03–1.08 (CH3), 3.35–4.29 (CH2–O–CH2), 7.57–8.13 (Ar–H)
	V2Ca(Pic)2	1.11–1.16 (CH3), 3.47–4.62 (CH2–O–CH2), 7.52–8.20(Ar–H)
	V2Mg(Pic)2	1.11–1.16 (CH3), 3.49–4.65 (CH2–O–CH2), 7.47–8.17 (Ar–H)