An Optical Overview of Poly[𝝁_𝟐-L-alanine-𝝁_𝟑-nitrato-sodium(I)] Crystals

Table 1

FT-IR and Raman functional group assignments of the grown LASN and DASN.

RAMAN (cm^−1)		FTIR (cm^−1)		Assignments
LASN	DASN	LASN	DASN
3706				Overtone
3426				Overtone
			3062	Symmetric CH3 stretching
3000	3003			Asymmetric CH3 stretching
		2987		Symmetric CH3 stretching
2964	2964			CH2 stretching and asymmetric CH3 stretching
2948				Symmetric CH2 stretching
		2941	2941	Symmetric NH3 stretching
2936	2933			Asymmetric CH2 stretching
2888	2888			CH2 stretching
	2734			Overtone
		2728	2727	N–H⋯O and O–H⋯O stretching
	2603		2601	Symmetric CH stretching
		2599		Symmetric CH stretching
2512			2511	Overtone
2484				Overtone
2444	2442			Overtone
		2251		CH3 stretching
2123	2119			Overtone
		2110	2110	Asymmetric NH3 stretching
1939				Asymmetric NH3 deformation
1775				Asymmetric COO stretching
1659				Asymmetric NH3 deformation
1630				Asymmetric NH3 deformation
		1613	1614	NH3 bending
1599	1596			Asymmetric NH3 deformation
		1584	1585	NH3 bending
1571				Asymmetric COO^- stretching
	1543			Overtone
1531				Symmetric NH3 deformation
		1518	1519	NH3 bending
1503				CH3 deformation
	1496			Overtone
1486	1489			Asymmetric COO^- deformation
1466	1465			CβH2 scissors mode
		1454	1454	Asymmetric CH3 bending
1422				CH3 bending
	1412	1411	1411	Symmetric C–COO^− stretching
1386				CH3 puckering
1363	1366			Wagging CH2 deformation
		1358	1358	NO3 stretching
	1312			CH2 wagging
1306		1306		C–H and N–H bending
			1297	Flexed position CH2
	1235	1236	1236	NH3+ rocking
		1218	1218	NH3+ rocking
1151	1150	1151	1151	NH3+ rocking and symmetric COO^− stretching
1113	1112	1113	1113	NO3 stretching
1070				Overtone
1050		1048	1048	Symmetric CCN stretching
1022	1027			CH3 rocking
		1012	1012	Overtone of torsional oscillation NH3+
926				NH3 rocking
	936			CH2 rocking
		918	919	Overtone of torsional oscillation NH3+
853	850			N–C stretching
		849	847	NO3 stretching
		829	829	C–C stretching
774	774			OH deformation
		771	771	NO3 stretching
725				COO wagging
		677	678	NO3− in plane deformation
	651	646	647	COO^− in plane deformation
		578	578	Overtone