Journal of Spectroscopy / 2018 / Article / Tab 2

Research Article

Characterization and Digital Restauration of XIV-XV Centuries Written Parchments by Means of Nondestructive Techniques: Three Case Studies

Table 2

Assignment of the main ATR-FTIR bands of the three parchments.

Wavenumber (cm−1)Band assignments
Parch. 34Parch. 37Parch. 38

3523; 3394Gypsum (νOH)
329432913291Collagen (Amide A) [4]
308730763078Collagen (Amide B) [4]
2932; 28542919; 28542924; 2854Collagen (νC–H) [4]
1796ν1 + ν4 combination band of CO3= [31]
163116311642Collagen (Amide I) [overlapping with δH–O–H (approx. 1610) of structural H2O] [4]
154115481545Collagen (Amide II)
144014301430δCH2 [4]
141514131413δipC–O–H (carboxylic side chains), δNH2 [4], ν3 asymmetric of CO3= [3, 31]
133313371323ωCH2/δC–H (methine) [4]
123612401242Amide III [3]
12001200νC–O–C and δC–H [3]
11621162NH3 + residual modes [30]
1140 (sh)ν3 calcium sulphate [4]
1113Gypsum (ν3 SO4=) [4]
1080 (sh)10811081νC–O or skeletal ν [30]
103410341034νC–N [30]or νC–O–C and νC–O [3]
874874874ν2 asymmetric of CO3= [3, 25]
711 (sh)ν4 symmetric of CO3=
670662Gypsum (δantis SO4=)
602602Gypsum (ν4as SO4=) [4]

ν = stretching; δ = bending; d = deformation; ip = in-plane; sh = shoulder.

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