Skip to main content

Table 5 FT-IR spectra peak values of (A) petroleum ether extract of A. occidentale, (B) ethylacetate extract of A. occidentale, (C) n-hexane extract of P. guajava, (D) chloroform extract of P. guajava, (E) ethylacetate extract of P. guajava, and (F) ethylacetate extract of T. catappa

From: Polymerization of deoxygenated sickle hemoglobin in the presence of fractionated leaf extracts of Anacardium occidentale, Psidium guajava, and Terminalia catappa

S/No Peak/band (cm−1) %T Functional groups/assignment Origin
A
1. 2955.8 67.950 Alkanes sp3 C-H stretch C-H
2. 2926.0 62.776 Alkanes sp3 C-H stretch C-H
3. 2855.1 78.007 Aldehyde C-H stretch C-H
4. 1748.1 98.517 Ester carbonyl C-O stretch C=O
5. 1606.5 99.085 Conjugated alkenes C-C C=C
6. 1453.7 82.438 Aromatic compounds C-C stretch C=C
7. 1379.4 91.002 Acyl C-O; phenol C-O stretch C=O; C-O
8. 1237.5 97.513 Aromatic ethers, aryl-O stretch Ar-O-C
9. 1036.2 97.765 Alkoxy C-O stretch X-O-C
10. 905.7 97.513 Mono-substituted alkene sp2 C-H bend =C-H
11. 767.8 97.464 Di-substituted aromatic sp2 C-H bend =C-H
12. 726.8 87.966 Mono-substituted aromatic sp2 C-H bend =C-H
13. 693.3 94.726 Di-substituted aromatic sp2 C-H bend =C-H
B
1. 3444.1 87.566 Dimeric O-H stretch O-H
2. 2989.1 87.083 Alkanes sp3 C-H stretch C-H
3. 2907.3 95.394 Alkanes sp3 C-H stretch C-H
4. 2091.0 98.362 Isothiocyanate (-SCN) stretch -SCN
5. 1889.8 98.918 Carboxylic acids C-O stretch C=O
6. 1736.9 45.205 Ester C-O stretch C=O
7. 1654.9 88.777 Amides C-O stretch C=O
8. 1446.2 86.722 Aromatic compounds C-C stretch C=C
9. 1376.9 45.205 Acyl C-O; phenol C-O stretch C=O; C-O
10. 1237.5 26.947 Skeletal C-C vibration C-C
11. 1092.1 80.365 Alkoxy C-O stretch X-O-C
12. 1043.7 32.142 Primary amine C-N stretch C-N
13. 939.3 87.721 Alkenes sp2 C-H bend =C-H
14. 878.7 87.409 Alkenes sp2 C-H bend =C-H
15. 849.8 83.588 Tri-substituted alkenes sp2 C-H bend C-H
16. 786.5 85.048 Di-substituted aromatic sp C-H bend C-H
17. 733.0 83.080 Mono-substituted aromatic C-H bend C-H
C
1. 2955.8 83.080 Alkanes sp3 C-H stretch C-H
2. 2926.0 60.632 Alkanes sp3 C-H stretch C-H
3. 2858.9 89.315 Alkanes sp3 C-H stretch C-H
4. 2728.4 99.307 Aldehyde C-H stretch C-H
5. 1990.4 99.392 Cyanate C-N stretch -C≡N
6. 1748.1 99.203 Esters C-O stretch C=O
7. 1610.2 98.594 Conjugated alkenes C-C stretch C=C
8. 1457.4 91.799 Aromatic ring stretch C=C
9. 1379.1 96.026 Nitro compounds NO2 stretch -N=O
10. 1155.5 98.738 Tertiary amine C-N stretch C-N
11. 1032.5 98.385 Primary amine C-N stretch C-N
12. 909.5 98.686 Vinyl C-H bend C-H
13. 805.1 98.057 Di-substituted aromatic C-H bend C-H
14. 767.8 97.557 Di-substituted aromatic C-H bend C-H
15. 730.6 95.929 Cis-alkenes sp2 C-H bend C-H
16. 697.0 96.671 Cis-alkenes sp2 C-H bend C-H
D
1. 3615.5 97.573 Primary amines N-H stretch N-H
2. 3391.9 94.951 Primary amines N-H stretch N-H
3. 3056.4 96.541 Aromatic compound C-H stretch C-H
4. 2974.4 92.265 Alkanes sp3 C-H stretch C-H
5. 2892.4 96.394 Alkanes sp3 C-H stretch C-H
6. 2307.2 99.009 Alkynes sp C-C stretch C≡C
7. 1733.2 95.893 Aldehyde C-O stretch C=O
8. 1636.3 98.056 Amides C-O stretch C=O
9. 1423.8 94.187 Alkanes sp3 C-H bend C-H
10. 1267.3 60.465 Alkyl & aryl halides (C-F stretch) C-F
11. 1047.4 75.523 Alkoxy C-O stretch X-O-C
12. 879.7 89.739 Alkenes sp2 C-H bend =C-H
13. 730.6 12.893 Para-aromatic sp2 C-H bend C-H
E
1. 3444.1 89.445 Alcohols O-H stretch O-H
2. 2981.9 87.541 Alkanes sp3 C-H stretch C-H
3. 2907.3 95.268 Aldehydes C-H stretch C-H
4. 2091.0 98.579 Alkynes sp C-C stretch C≡C
5. 1889.8 98.809 Carboxylic acid C-O stretch C=O
6. 1736.9 44.150 Aldehyde C-O stretch C=O
7. 1446.2 87.344 Aromatic compounds C-C stretch C=C
8. 1375.4 60.518 Nitro compounds NO2 stretch -N=O
9. 1237.5 27.455 Aromatic phosphates P-O-C stretch P-O-C
10. 1095.8 82.220 Alkoxy C-O stretch X-O-C
11. 1043.7 33.483 Primary amine C-N stretch C-N
12. 878.7 89.082 Aromatic phosphates P-O-C stretch P-O-C
13. 849.8 83.047 Tri-substituted alkenes sp2 C-H bend C-H
14. 785.5 86.047 Cis-alkenes sp2 C-H bend C-H
15. 738.0 74.085 Cis-alkenes sp2 C-H bend C-H
16. 704.5 83.018 Cis-alkenes sp2 C-H bend C-H
F
1. 3410.5 77.486 Alcohols O-H stretch O-H
2. 2981.9 85.453 Alkanes sp3 C-H stretch C-H
3. 2907.3 93.016 Alkanes sp3 C-H stretch C-H
4. 1725.8 56.071 Aldehyde C-O stretch C=O
5. 1446.2 86.294 Aromatic compounds C-C stretch C=C
6. 1375.4 62.498 Nitro compounds NO2 stretch -N=O
7. 1241.2 40.429 Acyl C-O; phenol C-O stretch C-O
8. 1088.4 77.450 Alkoxy C-O stretch X-O-C
9. 1043.7 35.790 Alkoxy C-O stretch X-O-C
10. 939.3 88.215 Mono-alkenes sp2 C-H bend C-H
11. 879.7 79.321 Alkene sp2 C-H bend C-H
12. 849.8 81.398 Tri-substituted alkenes sp2 C-H bend C-H
  1. %T percentage transmittance