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. 2022 May 25;12(25):15775–15786. doi: 10.1039/d2ra00905f

Wavenumbers corresponding to the vibrational modes of Sil, CNPs, and Sil–CNPs.

No. Wavenumber (cm−1) Vibrational modes
Chitosan/TPP
1 3190 O–H & N–H stretch
2 2870 C–H stretch
3 1630 C Created by potrace 1.16, written by Peter Selinger 2001-2019 O stretch acetyl GP
4 1540 N–H bending
5 1212 P Created by potrace 1.16, written by Peter Selinger 2001-2019 O stretching
6 1066 C–O asymmetric stretch
Sil
1 3425 Phenolic (OH) stretching
2 2870 C–H stretching
3 1732 Ketonic (C Created by potrace 1.16, written by Peter Selinger 2001-2019 O)
4 1510 Ring stretching C Created by potrace 1.16, written by Peter Selinger 2001-2019 C
5 1162, 1268 C–O–C stretching
Sil–CNPs
1 3289 OH stretching
2 1732 Ketonic (C Created by potrace 1.16, written by Peter Selinger 2001-2019 O)
3 1540 N–H bending
4 1510 Ring stretching C Created by potrace 1.16, written by Peter Selinger 2001-2019 C
5 1268 C–O–C stretching