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Table 3 Assignments of IR reflectance bands of photographic film based on literature [21, 24, 42, 50,51,52]

From: Rapid identification of cellulose nitrate and cellulose acetate film in historic photograph collections

Cellulose nitrate Cellulose acetate
Position (cm−1) Assignment Intensity Position (cm−1) Assignment Intensity
1727 ν(C=O) camphor Weak 1751 νs(C=O) Strong
1654 νa(NO2) Strong 1588 Additive Weak
1453 δ(CH2) Weak 1488 Additive Weak
1420 δ(COH) Weak 1432 δ(CH2) Weak
1375 δ(CH2) Weak 1369 δ(CH) Medium
1282 νs(NO2) Strong 1234 νa(CCO)ester Strong
1161 ν(COC) Weak 1187 δs(COC) Weak
1120 ν(COC) Weak 1162 νs(COC) Weak
1070 ν(COC) Medium 1123 νs(COC) Weak
1024 ν(COC) Weak 1052 νa(CCO) Strong
1004 ν(COC) Weak 963 Additive Weak
920 δring Weak 903 δ(CH) Weak
843 ν(NO) Medium    
750 δ(NO2) Weak    
694 δ(NO2) Weak    
  1. ν, stretching; δ, bending; a, anti-symmetric; s, symmetric