What absorbs at 2715 cm⁻¹ in an FTIR spectrum?
A band near 2715 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 2715 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 |
|---|---|---|---|
| Alkyl C-H | 2 | 2 | 1,0 |
| Aldehyde (CHO) | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| N 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 2715 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
-
Alkyl C-H pārliecība 1,0
“The peak located at 2963 was been characterized by UV spectrometry (at 490 nm), assigned to the stretching of the C-H bond from cm-1 °Brix, HPLC quantification of fructose and glucose, the CH group and at 2715 there was a peak 2 and changes”
Mondragon-Cortez 等 - 2022 - Application of Fourier transform infrared spectros DOI: 10.24275/rmiq/Alim2806 -
pārliecība 1,0
“-NH2 (N-HBending) (Medium) cm-1 cm-1 3650-3250 (Medium) -NH2 (N-H Stretching) 3445.97 1030.64cm-1 1090-1020cm-1 -NH2 (C-NStretching) (Medium) cm-1 cm-1 1650-1590 (Medium) -NH2 (N-H Bending) 1638.22 2715.39cm-1 and2611.01cm-1 >3000cm-1 Alkan”
Validation of the Developed Zero-Order Infrared Spectrophotometry Method for Qualitative and Quantitative Analyses of Tranexamic Acid in Marketed Tablets DOI: 10.3390/molecules26226985 -
Aldehyde (CHO) pārliecība 1,0
“LLM confirmed rule peak-group candidate”
Razgon 等 - 2008 - Ozonolysis-based route to the in situ formation of DOI: 10.1021/la703120c
Vai jums ir spektrs ar šo joslu?
Augšupielādējiet savu FTIR spektru un dažu sekunžu laikā iegūstiet pilnu interpretācijas ziņojumu — maksimumu piešķīrumus ar literatūras atsaucēm, bibliotēku saskaņošanu un pārliecības līmeņa pierādījumu ķēdi.