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
2600 cm
−1
H-bonded NH vibration band
*
23
2633/678 cm
−1
Stretching N-H (NH
3
+
)
*
48
2700-3300 cm
−1
C-H stretches
*
107
2700-3500 cm
−1
Stretching vibrations of CH, NH,
and OH groups
*
2
2727/731 cm
−1
Stretching N-H (NH
3
+
)
*
48
2761 cm
−1
CH
3
modes
*
57
2765/66/69/99 cm
−1
Stretching N-H (NH
3
+
)
*
48
2800 cm
−1
Stretching N-H (NH
3
+
)
*
48
2800-3000 cm
−1
C-H
*
65
Lipid region
*
40
CH
3
, CH
2
lipid and protein
*
56
2800-3020 cm
−1
C-H stretching vibrations
*
85
2800-3050 cm
−1
Contributions from acyl chains
*
2
2800-3100 cm
−1
C-H stretching vibrations of
methyl (CH
3
) and methylene
(CH
2
) groups and olefins
*
74
CH, CH
2
, and CH
3
symmetric
and antisymmetric stretching
*
108
C-H stretching vibrations of
methyl (CH
3
) and methylene
(CH
2
) groups and olefins
*
17
2800-3500 cm
−1
Cholesterol, phospholipids, and
creatine (higher in normal tissues)
*
62
Stretching vibrations of CH
2
and
CH
3
of phospholipids,
cholesterol, and creatine
*
62
2802/12/20/21/4/
34 cm
−1
Stretching N-H (NH
3
+
)
*
48
2834 cm
−1
Symmetric stretching of
methoxy (1)
*
6
2836 cm
−1
Stretching N-H (NH
3
+
)
*
48
2838 cm
−1
Stretching C-H
*
48
Symmetric stretching of
methoxy (3)
*
*
6
2846 cm
−1
Symmetric stretching of
methoxy (4)
*
6
2848 cm
−1
Cholesterol, phospholipids, and
creatine (higher in normal tissues)
*
62
Stretching vibrations of CH
2
and
CH
3
of phospholipids,
cholesterol, and creatine
*
62
(
Continued
)
Search WWH ::
Custom Search