Table 1.

Assignment to vibrations of the various molecules used in the present study

Analytes	Peak position (cm-1)	Assignments
Crystal violet9	918	Ring skeletal vibration
	1181	Ring C−H bending a
	1379	N-phenyl stretching
	1530 and 1621	Ring C−C stretching
Adenine10	534	Wagging C2-H, N9-H13
	621	Ring deformation
	722	Ring breath
	1125	Stretching C8-N9, bending N9-H, C8-H
	1246	Rocking NH2, stretching C5-N7, N1-C2, C2-N3
	1330	Stretching C5-N7, N1-C2, C3-N3, C5-C6, bending C2/8-H
	1481	Stretching C2-N3, N1-C6, bending C2-H, scissoring NH2
Cytosine10	604	Bending C2=O
	792	Ring breathing
	1115	C=O
	1251	Ring stretching C-N
	1368	Bending N1-H, C5-H, C6-H
	1524	Stretching N3-C4-C5
	1641	Stretching C2=O
Penicillin-G11,12	985	β-lactam ring
	1586	Stretching of C-O
	1668	C=O