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. 2021 Apr 15;34(6):1481–1495. doi: 10.1021/acs.chemrestox.0c00430

Table 2. Summary of Assignments of Main Vibrational Bands.

samples HRP amide I (cm–1) HRP amide II (cm–1)73 CH2 bending/amino acids side chains (cm–1)74 HRP amide III/amino acids side chains (cm–1)75 HRP C–O, C–C, C–O–C (cm–1)74 asymmetric PO43– (cm–1)76 symmetric PO43– (cm–1)76 H2O liberation (cm–1)77,78
HRP powder 1646 1544, 1527 1480, 1450 1388 1040, 1079      
HRP solution 1638 1551            
Mn NPs, saline 1645–1650 1538–1541 1451 1365–1370        
Mn NPs, PBS           1017, 1047, 1098 997  
Ni NPs, DMEM 1650–1645 1554–1560 1412–1450 1299 1042–1045      
Ni NPs, saline 1640 1538 1433–1441 1304–1308 1008–1024      
Ni NPs, PBS 1650 1558/1510 1436 1308 1116, 1047 1116, 1047    
Cu NPs, saline 1636–1643a 1535, 1520,1497 1444,1432, 1386, 1292       890
Cu NPs, PBS 1655a 1538   1392, 1157   1005   890
a

Major contribution from H2O bending mode at ≈1643 cm–1