What absorbs at 1107 cm⁻¹ in an FTIR spectrum?
A band near 1107 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
Quick answer
A band near 1107 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| C-O single bond | 15 | 13 | 1.0 |
| Methoxy (OCH3) | 12 | 10 | 1.0 |
| Methacrylate | 12 | 10 | 1.0 |
| Acetate | 12 | 10 | 1.0 |
| Hydroxyl (O-H) | 6 | 5 | 1.0 |
| Hydrogen bond | 4 | 4 | 1.0 |
| Carbohydrate | 4 | 4 | 1.0 |
| Alkyl C-H | 3 | 3 | 1.0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1.0 |
| Siloxane (Si-O-Si) | 2 | 2 | 1.0 |
| Lignin | 1 | 1 | 1.0 |
| Urea | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| N-O bond | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Protein | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Silicon hydride | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
Ranking reflects accumulated literature evidence, not a single fixed rule. Always confirm against your sample context.
Possible materials
| Material | Supporting peaks | Overlapping groups | Cited sources |
|---|---|---|---|
| cellulose | 1107, 1735, 1650 | Acetate, Methacrylate, C-O single bond | 1 |
| protein | 1107, 1650, 1640 | Methacrylate, Acetate | 1 |
Materials are shown only when the same literature pool supports this band and at least one additional characteristic peak.
Spectrum logic
This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 1107 cm⁻¹ is usually not enough for material identification by itself.
Real-world usage
This type of query is common in polymer identification, unknown plastic screening, QC troubleshooting, recycled-material verification, and literature-backed peak assignment review.
Common mistakes
- Treating one isolated band as proof of a material without checking at least one or two supporting peaks.
- Ignoring overlap: multiple functional groups can contribute near the same wavenumber.
- Skipping validation when additives, blends, oxidation, or contamination may distort the spectrum.
Verification advice
When ambiguity remains, validate the hypothesis with DSC, GC-MS, or TGA, especially for blends, degraded samples, and filled polymers.
Literature behind these assignments
-
confidence 1.0
“A small band at the correspond to (1 0 1), (0 0 4), (2 0 0), (1 0 5), (2 1 1), (2 0 4), (1 1 6), cm-1 cm-1 and 1107 corresponds to Ti O C stretching mode 1699 2 0) and (2 1 5) plane values.”
Synthesis and characterization of polypyrrole/TiO2 composites by chemical oxidative method DOI: 10.1016/j.ijleo.2012.02.029 -
Acetate confidence 1.0
“cm-1 served at 3047 The strong peak at 1107 To evaluate the electrochemical property of PEPP is due to the symmetric C-O-C stretching frequency for electro-active application, cyclic voltammetry (CV) of N-2-propionate group, whereas the car”
Gal 等 - 2016 - Synthesis and Characterization of a Water-Soluble DOI: 10.12693/APhysPolA.129.642 -
Acetate confidence 1.0
“first overtone, cellulose 1457 Paecilomyces cm-1 20 C-O stretching vibration 1107,1053,1031 Control”
A Microscopic Study of Paper Decayed by Trichoderma harzianum and Paecilomyces variotii DOI: 10.1007/s10924-017-1147-6 -
Silicon hydride confidence 1.0
“It can be seen from the spectra that, a three sharp absorption bands appear at 2109 cm-1, cm-1 cm-1 cm-1 915 and 615 assigned to Si-H vibration and the band appears at 1107 due to 2 7”
Structural, optical and electrical characterization of nanostructured porous silicon: Effect of current density DOI: 10.1016/j.saa.2015.07.055 -
confidence 1.0
“The Si-O increase in the peak intensity and the decrease in the peak frequency of the stretching vibration cm-1 at 1107 support that the hydrogen bonds are formed between the hydrogen atoms in the PAL amino groups and the oxygen atoms in Si”
Lu 和 Mi - 2005 - Characterization of the interfacial interaction be DOI: 10.1021/ma0486896 -
Acetate confidence 1.0
“+ C-C 1135 unclear 1135 unclear 1134 1134 1136 stretching stretching C-O + C-H 1105 unclear 1107 unclear 1108 1106 1115 stretching rocking (+) (+) C-O 1070 1094 1070 1095 1086 1081 1082 stretching”
Maeda - 2001 - IR spectroscopic study on the hydration and the ph DOI: 10.1021/la001346q -
Siloxane (Si-O-Si) confidence 1.0
“x cm-1, cm-1, He/O 1044 Si-O-Si network stretch at 1107 and Si-O-Si the treated sample compared to the O ashed film can be 2 2 cm-1.”
Vinogradova 等 - 2008 - Application of deuterium exchange to analyze moist DOI: 10.1149/1.2947786(cid:2) -
Protein confidence 1.0
“cm-1(-)/1228 cm-1(+) cm-1is consistent with a protein origin, and its frequency is The bands at 1244 and 1107 cm-1(+) (-)/1099 15N characteristic for an aspartic or glutamic acid that remains in are also sensitive to labeling of the state.2”
van Thor 等 - 2005 - Assignments of the Pfr-Pr FTIR difference spectrum DOI: 10.1021/jp052323t
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