What absorbs at 615 cm⁻¹ in an FTIR spectrum?
A band near 615 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 615 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.
Penetapan kumpulan berfungsi yang mungkin
| Kumpulan berfungsi | Fakta sokongan | Sumber dipetik | Keyakinan tertinggi |
|---|---|---|---|
| Metal oxygen | 4 | 4 | 1.0 |
| Hydroxyl (O-H) | 3 | 3 | 1.0 |
| Chlorine | 2 | 1 | 1.0 |
| Silicon silicon | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Nitrogen heterocycle | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 0.9 |
| Ring structure | 1 | 0 | 1.0 |
| Aromatic ring | 1 | 0 | 1.0 |
Pemeringkatan mencerminkan bukti literatur terkumpul, bukan satu peraturan berwibawa. Sentiasa sahkan terhadap konteks sampel anda.
Possible materials
| Bahan | Puncak sokongan | Overlapping groups | Sumber dipetik |
|---|---|---|---|
| silver nanoparticles | 615, 1636, 1631 | Hydroxyl (O-H) | 1 |
| ZnO | 615, 1400, 3430 | Metal oxygen, Hydroxyl (O-H) | 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 615 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.
Literatur di sebalik penetapan ini
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Metal oxygen keyakinan 1.0
“several absorption peaks appearing in the range from 600 to 3600 The presence of CeO 2 cm-1, nanoparticles is confirmed by the appearance of characteristic band at ~ 615 attributed cm-1 to the symmetric stretching vibration of Ce-O.”
Oxygen vacancies and F+ centre tailored room temperature ferromagnetic properties of CeO2 nanoparticles with Pr doping concentrations and annealing in hydrogen environment DOI: 10.1016/j.jallcom.2020.156079 -
keyakinan 1.0
“Finally, the band at 615 can be assigned to the C-Cl bond as mentioned by Sadegui [50].”
Synthesis and Catalytic Evaluation of Silver Nanoparticles Synthesized with Aloysia triphylla Leaf Extract DOI: 10.1007/s10876-016-1062-3 -
Hydroxyl (O-H) keyakinan 1.0
“Further confirming the existence of AgNPs and PVA polycm-1, mer, the absorption band between 3300 and 3500 which represents the cm-1, stretching vibration of O-H [37-39] and the band at 615 which represents cm-1 weak O-H stretching [33], ar”
The effect of Ag nanoparticles in Ag/polyvinyl alcohol nanofiber composites DOI: 10.1007/s00289-020-03528-2 -
Metal oxygen keyakinan 1.0
“cm-1, cm-1 cm-1, Bands 615 522 in pure MgFe 2O and 617 4 cm-1 528 in MgFe 2O 4-ZnO NC are due to stretching vibrations of the metal-oxygen bond (Fe-O), (Mg-O) at the tet-”
EPR and optical studies of pure MgFe2O4 and ZnO nanoparticles and MgFe2O4–ZnO nanocomposite DOI: 10.1007/s10854-019-02028-y -
Alkyl C-H keyakinan 1.0
“For C-H configuration in dextran, a characteristic peak appeared at 615 are becomes distinguishable, as observed in our previous work for chitosan-based electrolyte.”
Development of Polymer Blend Electrolyte Membranes Based on Chitosan: Dextran with High Ion Transport Properties for EDLC Application DOI: 10.3390/ijms20133369 -
Nitrogen heterocycle keyakinan 1.0
“The cm-1 typical bands of PPy, at 1540/1550 (C-C stretching in pyrrole ring of PPy salt/base), cm-1 cm-1 1450 (C-N stretching in pyrrole ring), 1310 (C-H and C-N in-plane deformacm-1 cm-1 (N-H+ tions), 1170 (C-H and N-H in-plane deformation”
Polypyrrole Aerogels: Efficient Adsorbents of Cr(VI) Ions from Aqueous Solutions DOI: 10.3390/gels9070582 -
Phosphate (PO4) keyakinan 1.0
“The peaks at around 615, 591 and 𝜈 could be attributed to (PO43-) vibration mode [41,44].”
Development of Silver Doped Hydroxyapatite Thin Films for Biomedical Applications DOI: 10.3390/coatings12030341 -
Metal oxygen keyakinan 1.0
“SiO4 asymmetric deformation 450-700 ZnO symmetric starching vibrations 4 576 Zn O symmetric stretching vibration 460 SiO asymmetric deformation 4 Zn O asymmetric stretching 615 576”
A Study on Optical Properties of Zinc Silicate Glass-Ceramics as a Host for Green Phosphor DOI: 10.3390/app10144938
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