Bactericides Properties of Chitosan Metal Quantum Dots Microbial Pathogenicity Against E. coli, S. aureus, and S. Typhi

Table 5

FT-IR spectra in mid and far range of solvent, chitosan, and Au, Ag, and Cu solids supported in chitosan.

Characteristic bands	Solvent	Chitosan	Au [A]	Au [B]	Ag [A]	Ag [B]	Cu [A]	Cu [B]
Axial stretching -OH and -NH2	3464	3375.62	3464.46; 3289.85	3472.0; 3290.46	3419.3	3426.71	3427.43	3425.01
Asymmetrical axial stretch -C-H2	2918.5	2930.83	-	-	2920.25	2912.56	2919.76	2920.99
Symmetrical axial stretch -C-H2	2875	-	2875.84	2878.22	2873.83	2874.78	2866.47	2862.62
Stretch -C=O	-	1558.61	1596.72	1596.88	1648.71	1601.51	1641.54	1721.70
Balancing -CH2	1417	1411.46	1425.75	1426.19	1425.57	1426.08	1431.76	1426.10
Coupled deformation modes of H-C-H; C-H; -C-OH	1291; 1231; 1170	-	1331.02; 1259.37	1327.25; 1255.64	1329.87; 1260.72	1329.87; 1256.88	1321.58	1318.34; 1264.56
Stretching of C-O and C-O-C	1057	1151.50	1090.31	1087.60	1089.76	1091.70	1084.41	1087.09
Stretching ѵ (M-O)	-	517.11	571.95; 521.23	564.78; 515.23	578.12; 522.77	579.96; 522.17	584.34; 524.53	518.15
Stretching ѵ (M-N)	-	-	422.62	420.22	417.61	418.34	419.43	-
δ(CH) ρ(COO)	-	356.29	355.79	354.67	354.52	355.02	355.36	354.06
N-M-N	-	-	265.95	264.50	267.41	265.87	-	265.59
M-M	-	-	-	-	114.97	164.93; 112.39	168.16; 112.55	113.61