Biomedical Engineering Reference
In-Depth Information
Table 8.1 ( Continued )
Major Characteristic Peak Frequencies Reported in the Literature
Reference
Number
Peak
Assignment
FT-IR
Raman
Mainly from absorption bands of
the phosphodiester group of
nucleic acids and membrane
phospholipids, and partially
protein (amide III).
*
78
Amide III
PO 2 asymmetric vibrations of
nucleic acids when it is
nonhydrogen-bonded
ν as PO 2
*
78
Collagen
*
64
Asymmetric phosphodiester
stretching band
Amide III
*
65
PO 2 ionized asymmetric
stretching
*
40
ν(PO 2 ) asymmetric stretching of
phosphodiesters
*
40
Composed of amide III mode of
collagen protein and the
asymmetric stretching mode of
the phosphodiester groups of
nucleic acids
*
66
62, 77
Asymmetric stretching mode of
phosphodiester groups of
nucleic acids
*
38, 66, 67,
70
Collagen
*
51
Antisymmetric stretching
vibrations of the PO 2 group
*
51
*
69
*
47
1240-45 cm −1
Phosphate I (stretching PO 2
symmetric vibration) in A -form
RNA
*
23
1240-65 cm −1
Amide III(C-N stretching mode
of proteins, indicating mainly
α-helix conformation)
*
9, 83
1240-310 cm −1
νC-N, amide III
*
76
1241 cm −1
PO 2 asymmetric (phosphate I)
*
48
Phosphate band
*
79
 
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