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

Table 2

IR spectral data of alkali and alkaline earth metal complexes with ionophore V₂.

Ionophore	Complex	Selected IR absorption bands in ionophore and respective shift in complexes (cm^−1)
V2		2873 (C–H), 1676 (C=O), 1264, 1162, 1127, 1097 (CH2–O–CH2)
	V2LiPic	2881 (C–H), 1675 (C=O), 1270, 1160, 1130, 1078 (CH2–O–CH2)
	V2NaPic	2873 (C–H), 1679 (C=O), 1270, 1161, 1130, 1074 (CH2–O–CH2)
	V2KPic	1674 (C=O), 1266, 1161, 1074 (CH2–O–CH2)
	V2Ca(Pic)2	1675 (C=O), 1271, 1164, 1133, 1080 (CH2–O–CH2)
	V2Mg(Pic)2	1633 (C=O), 1270, 1163, 1129, 1079 (CH2–O–CH2)