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Table 1 Interpretation of the absorption band IR spectra of LiClO₄, DEG-1, and PEPA

From: Structural Peculiarities of Ion-Conductive Organic-Inorganic Polymer Composites Based on Aliphatic Epoxy Resin and Salt of Lithium Perchlorate

LiClO₄		DEG-1		PEPA
Wave number, cm⁻¹	Group, type fluctuations	Wave number, cm⁻¹	Group, type fluctuations	Wave number, cm⁻¹	Group, type fluctuations
3100–3600	–OH, ν (a water)	3100–3600	–OH, ν	3100–3600	NH₂ + NH, ν
1637	LiClO₄	2914	–CH₂–, ν _asym	2941	–CH₂–, ν _asym
1086, 1113, 1146	ClO₄ ⁻, ν _asym	2872	–CH₂–, ν _sym	2827	–CH₂–, ν _sym
941	ClO₄ ⁻, ν _sym	1458	–CH₂–, δ	1641, 1585	NH₂ + NH, δ
627	ClO₄ ⁻ (not associated with Li⁺)	1352	CH₂–, δ	1462	CH₂–, δ
–	–	1253	Epoxy group, ν _sym	1310	CH₂–, δ
–	–	1105	C–O–C, ν	1124	C–N–C, ν
–	–	910, 856	Epoxy group, ν _asym	–	–

ν valence vibration, ν _sym and ν _asym valence symmetric and asymmetric vibrations, δ bending vibration

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