FTIR and Raman Characteristic Peak Frequencies in Biological Studies - Vibrational Spectroscopy for Tissue Analysis - page 225

Table 8.1 ( Continued )
Major Characteristic Peak Frequencies Reported in the Literature

Reference
Number Peak Assignment FT-IR Raman

932 cm −1 Skeletal C-C, α-helix * 9

933 cm −1 Proline, hydroxyproline, ν(C-C)

skeletal of collagen backbone

* 3

934 cm −1 C-C backbone (collagen

assignment)

* 19

935 cm −1 C-C stretching mode of proline,

valine, and protein backbone

* 10, 20

(α-helix conformation)/glycogen
(protein assignment)

* 9

Ρ(CH 3 ) terminal, proline, valine +
ν(CC) α-helix keratin (protein
assignment)

* 33

936 cm −1 Protein peak * 17

937 cm −1 Proline (collagen type I) * 3

Amino acid side chain vibrations
of proline and hydroxyproline,
as well as a

* 3

(C-C) vibration of the collagen
backbone
C-C backbone (collagen
assignment)

* 19

Glycogen * 8

ν(C-C) residues (α-helix) * 43

Out-of-phase ring CH wag * 14

937/8 cm −1 Proline, hydroxyproline, ν(C-C)

skeletal of collagen backbone

* 3

938 cm −1 Unassigned * 38

C-C stretch backbone * 9

939 cm −1 Structural proteins like collagen * 32

C-C skeletal stretching in
protein

* 16

940 cm −1 Carotenoid * 25

CH 2 rocking mode * 44

941 cm −1 Skeletal modes (polysaccharides,

amylose)

* 7

Skeletal modes (polysaccharides,
amylopectin)

* 7

943 cm −1 Cyclic C-C, ring and C-NR2

stretch

* 14

Out-of-phase ring CH wag * 14

945 cm −1 CH 6',5' out of plane * 6

948 cm −1 Structural proteins like collagen * 34

( Continued )