What absorbs at 3193 cm⁻¹ in an FTIR spectrum?
A band near 3193 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 3 cited sources
Quick answer
A band near 3193 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.
Iespējamie funkcionālo grupu piešķīrumi
| Funkcionālā grupa | Atbalstošie fakti | Citētie avoti | Augstākā pārliecība |
|---|---|---|---|
| N h | 3 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
Rangs atspoguļo uzkrātos literatūras pierādījumus, nevis vienu autoritatīvu noteikumu. Vienmēr apstipriniet atbilstoši parauga kontekstam.
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 3193 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.
Literatūra aiz šiem piešķīrumiem
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N h pārliecība 1,0
“cm-1 The vibrational bands at 3329 and 3193 corresponded to the stretching symmetThe vibrational bands at 3329 and 3193 cm-1 corresponded to the stretching symric vibration of NH and the bending symmetric vibration of NH for DES1, indicatin”
Can 等 - 2023 - Choline Chloride-Based Deep Eutectic Solvent-Treat DOI: 10.3390/f14030569 -
N h pārliecība 1,0
“In clusterised SMX, the stretching of NH at 3193 is downshifted = -47 1) cm-1), with respect to its position when singly adsorbed (3240 whereas the NH bending at”
Braschi 等 - 2016 - Effect of humic monomers on the adsorption of sulf DOI: 10.1016/j.chemosphere.2016.04.008 -
Hydroxyl (O-H) pārliecība 1,0
“LLM confirmed rule peak-group candidate”
Spray Dried Inhalable Ivacaftor Co-Amorphous Microparticle Formulations with Leucine Achieved Enhanced In Vitro Dissolution and Superior Aerosol Performance DOI: 10.1016/j.ijpharm.2022.121859.
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