What absorbs at 614 cm⁻¹ in an FTIR spectrum?
A band near 614 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 7 cited sources
Quick answer
A band near 614 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.
Возможные назначения функциональных групп
| Функциональная группа | Подтверждающие факты | Цитируемые источники | Максимальная достоверность |
|---|---|---|---|
| Alkyl C-H | 1 | 1 | 1,0 |
| Nitro (NO2) | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Silicon silicon | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 0,8 |
Ранжирование отражает накопленные литературные данные, а не единственное авторитетное правило. Всегда проверяйте в контексте вашего образца.
Possible materials
| Материал | Поддерживающие пики | Overlapping groups | Цитируемые источники |
|---|---|---|---|
| PVDF | 614, 1160, 840 | Alkyl C-H | 2 |
| PVC | 614, 834, 1195 | Alkyl C-H, 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 614 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.
Литература, лежащая в основе этих назначений
-
Silicon (Si) достоверность 1,0
“The IR absorption cm(cid:0) cm(cid:0) 1 1 and 1109 were noted on both bands centered around 614 pristine and irradiated samples, which correspond to the Si-Si bond and Si-O-Si -22].”
Ion beam induced modification and nanostructures formation in thin SiC/Pd films on c-Si substrate DOI: 10.1016/j.nimb.2021.01.018 -
Ester достоверность 1,0
“were present in both FTIR spectra of plant extract and FeNPs, such as alkyl halides, alkynes, aromatics and aliphatic amines, esters, ethers, alcohol, carboxylic acids, and nitro Nanomaterials2022,12,2404 11of25 compounds with peaks at 526.”
Green Synthesis and Characterization of Iron Nanoparticles Synthesized from Aqueous Leaf Extract of Vitex leucoxylon and Its Biomedical Applications DOI: 10.3390/nano12142404 -
Alkyl C-H достоверность 1,0
“Trans -CH and cis -CH wagging modes may be seen at 958 and 614 cm-1 respectively.”
Ramadan 和 Ismail - 2022 - Tunning the Physical Properties of PVDFPVCZinc F DOI: 10.21203/rs.3.rs-935328/v1 -
достоверность 1,0
“With the 8:26:54 shi increase of the Mn content, the larger in the absorption cm(cid:3)1 x-ZnO peak at 614 may be ascribed to the doping of Mn.”
Improved NO reduction by using metal–organic framework derived MnOx–ZnO DOI: 10.1039/d0ra04161k -
достоверность 0,9
“Band at 614 cm-1 corresponds to elongation vibration of S-O bond of sodium sulfate.”
Anthropological and analytical studies of two Egyptian human mummies' heads from Deir-el-Medineh DOI: 10.1016/j.matlet.2022.133265 -
Metal oxygen достоверность 0,8
“Assigned to octahedral site of cobalt oxide.”
External magnetic field effects on the characteristics of cobalt nanoparticles prepared by pulsed laser ablation DOI: 10.1007/s11082-020-02694-x -
достоверность 0,8
“Bands around 763 and/or 614 for alpha phase.”
A critical analysis of the α, β and γ phases in poly(vinylidene fluoride) using FTIR DOI: 10.1039/c7ra01267e
Есть спектр с этой полосой?
Загрузите свой FTIR-спектр и получите полный отчет об интерпретации — назначение пиков с цитированием литературы, совпадения с библиотекой и цепочку доказательств с оценкой достоверности — за секунды.