What absorbs at 677 cm⁻¹ in an FTIR spectrum?
A band near 677 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 677 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.
Attributions possibles de groupes fonctionnels
| Groupe fonctionnel | Faits à l＇appui | Sources citées | Confiance maximale |
|---|---|---|---|
| Methacrylate | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| N h | 2 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Chlorine | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| Borate | 1 | 1 | 1,0 |
| Carbon dioxide | 1 | 1 | 0,6 |
Le classement reflète les preuves bibliographiques accumulées, et non une règle faisant autorité. Confirmez toujours dans le contexte de votre échantillon.
Possible materials
| Matériel | Pics de support | Overlapping groups | Sources citées |
|---|---|---|---|
| Chitosan | 677, 1650, 1655 | Acetate, Methacrylate, N h | 1 |
| polyamide | 677, 1663, 1541 | Methacrylate, Acetate, N h | 1 |
| ZnO | 677, 1400, 3430 | Acetate, Methacrylate | 1 |
| silver nanoparticles | 677, 1636, 1631 | Methacrylate, Acetate, N h | 1 |
| PLA | 677, 1650, 1073 | Methacrylate, Acetate | 1 |
| curcumin | 677, 1063, 1153 | 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 677 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.
Bibliographie derrière ces attributions
-
Borate confiance 1,0
“Though the IR band at 677 be assigned to the bending of B-O-B linkages in the pure borate glassy network, in our borotellurite”
Lakshminarayana 等 - 2019 - Borotellurite Glasses for Gamma-Ray Shielding An DOI: 10.1007/s11664-018-6810-8 -
confiance 1,0
“Samples were and 853 The peak at 677 is associThis N-H prepared by dispersion in methanol and transferred on to holy ated with bending.”
Magee 等 - 2023 - Silane functionalization of WS2 nanotubes for inte DOI: 10.1039/d3nr00583f -
Metal oxygen confiance 1,0
“The cm(cid:2)1 is associprominent absorption peak at 431 ated with the fundamental Zn-O stretching mode.40,41 cm(cid:2)1, The other peaks observed at 677 cm(cid:2)1, cm(cid:2)1,”
Pandey 等 - 2016 - Deposition and Characterization of AlZnO Thin Fil DOI: 10.1007/s11664-016-4750-8 -
confiance 1,0
“The FTIR analysis revealed a new peak at about 677 which indicates the formation of C-Cl groups in the used membranes.”
Rupiasih 等 - 2018 - Study on Transport Properties of Chitosan Membrane DOI: 10.5614/j.math.fund.sci.2018.50.2.6 -
Acetate confiance 1,0
“The existence of polymorph A of SAC is indicated by the presence of a peak at cm-1, 677 which is associated with a distortion of the O-C=O bond angle [43].”
The Influence of Emulsifiers on the Physiochemical Behavior of Soy Wax/Rice Bran Oil-Based Oleogels and Their Application in Nutraceutical Delivery DOI: 10.3390/gels9010047 -
confiance 1,0
“the S-O stretching vibration at 677 Finally, it can be clearly identified all the bands cm-1, 2912 cm-1 and 2849 cm-1, corresponding to the alkyl C-H to the paraffin: at 2954 cm-1, cm-1 cm-1, belonging to the paraffin: at 2954 2912 and 2849”
Study of Melamine-Formaldehyde/Phase Change Material Microcapsules for the Preparation of Polymer Films by Extrusion DOI: 10.3390/membranes12030266 -
confiance 1,0
“ence of moisture, and at 1120 cm-1 longitudinal Si-O stretching, between 1000 cm-1 and 1030 cm-1 Si-O stretching due to the presence of quartz, O-H folding at 911 cm-1 from internal hydroxyl, Si-O folding at 753 cm-1, perpendicular stretchi”
Development of an Epoxy Matrix Hybrid Composite with Astrocaryum Aculeatum (Tucumã) Endocarp and Kaolin from the Amazonas State in Brazil DOI: 10.3390/polym15112532 -
Alkyl C-H confiance 1,0
“The peaks at 677 and cm-1 2h intense peaks in the whole spectrum of values ranging 652 were found to correspond CH out-of-plane”
Biosynthesis of silver nanoparticles from Premna serratifolia L. leaf and its anticancer activity in CCl4-induced hepato-cancerous Swiss albino mice DOI: 10.1007/s13204-014-0397-z
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