Table 5. FTIR-deconvolution bands of the copper-treated sample.

Treatment
peak
identification
(*)
C-H
C-OH
Cu
complex
COO-
CO-C-CO
H2O
CO
COOH
other features
(**)
centre
1429
1449
1547
-
-
1637
1716
1737
-
Unaged
width
20
83
41
-
-
84
40
31
-
height
0.28
0.67
0.03
-
-
0.25
0.04
0.03
-
centre
1428
1449
1541
-
1622
1641
1716
1734
-
Sealed tube aged
width
18
79
30
-
31
76
26
59
3340 tooth
1000-1200 mrs
height
0.35
0.64
0.02
-
0.07
0.31
0.03
0.13
-
centre
1429
1453
1542
1601
-
1640
1716
1738
-
aged, pH 10 washed
width
21
75
54
95
-
92
38
37
-
height
0.40
0.62
0.04
0.07
-
0.29
0.03
0.04
-

(*) For peak identification see text and ref.12.

(**) tooth = small and sharp signal above the large OH absorption; mrs = more resolved structure (both characteristic of acidic degradation [22].

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