What absorbs at 934 cm⁻¹ in an FTIR spectrum?
A band near 934 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 934 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.
可能的官能团归属
| 官能团 | 支持性事实 | 引用来源 | 最高置信度 |
|---|---|---|---|
| C c single bond | 4 | 4 | 1.0 |
| Methoxy (OCH3) | 3 | 3 | 1.0 |
| Methacrylate | 3 | 3 | 1.0 |
| Acetate | 3 | 3 | 1.0 |
| Hydroxyl (O-H) | 3 | 3 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Fluorine (C-F) | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Protein alpha helix | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Silicate | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| Oxygen heterocycle | 1 | 1 | 0.9 |
| Perchlorate | 1 | 1 | 0.7 |
排名反映了累积的文献证据，而非单一的权威规则。请始终对照您的样品背景进行确认。
Possible materials
| 材料 | 支持峰 | Overlapping groups | 引用来源 |
|---|---|---|---|
| HCl | 934, 1708, 1032 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| polyvinylpyrrolidone | 934, 1660, 1700 | Methacrylate, Acetate | 1 |
| DNA | 934, 1712, 1660 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| PVP | 934, 2983, 1648 | 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 934 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.
这些分配背后的文献
-
置信度 1.0
“The higher-intensity peak of 934.44 eV is attributed to Cu (II) species shown”
Ibrahim 等 - 2023 - Role of ammonium phosphate in improving the physic DOI: 10.37190/ppmp/161510 -
Acetate 置信度 1.0
“The peak at 933.59 denotes vibrations from C-O stretching [43].”
Mahardiani 等 - 2022 - Nanofiber Fabrication from Palm Fiber Waste for Su DOI: 10.48317/IMIST.PRSM/morjchem-v10i2.32648 -
Silicon (Si) 置信度 1.0
“cm-1 The intense peak located at 934 corresponds to asymmetric stretching of Si-O-Si bonds.”
Structural and optical properties of green emitting Y2SiO5:Tb3+ and Gd2SiO5:Tb3+ nanoparticles for modern lighting applications DOI: 10.1007/s12598-020-01585-0 -
置信度 1.0
“The ν(C-F) shows two bands at ~934 and 990 cm-1, the latter resulting from Assignment A Conformation B Conformation vibrations characteristic of the pentafluorobenzoate group.”
The Application of ATR-FTIR Spectroscopy and the Reversible DNA Conformation as a Sensor to Test the Effectiveness of Platinum(II) Anticancer Drugs DOI: 10.3390/s18124297 -
C c single bond 置信度 1.0
“The peak at 758 800 (cid:3)C for all the PVP amount exhibit and also is assigned to the C-C an unreacted ZnO phase at the peak position of ring vibration, while the peak at 934 is due to C-C ring 2h = 36.40(cid:3) which corresponds to the 0”
Alibe 等 - 2019 - Effects of polyvinylpyrrolidone on structural and DOI: 10.1007/s10973-018-7874-7 -
Silicate 置信度 1.0
“this peak was attributed to the reduction of Cu0/Cu1+ main peaks located at 933.5 eV and 935.8 eV, attributed to the presence of and Ni2+ in nickel silicate [36].”
Enhanced Cyclopentanone Yield from Furfural Hydrogenation: Promotional Effect of Surface Silanols on Ni-Cu/m-Silica Catalyst DOI: 10.3390/catal13030580 -
Alkyl C-H 置信度 1.0
“The β(C-H) vibrations of the bonded modulator gave rise to peaks at 1072 and 934 cm-1 [48].”
Butova 等 - 2023 - In Situ FTIR Spectroscopy for Scanning Accessible DOI: 10.3390/nano13101675 -
Acetate 置信度 1.0
“FTIR spectra 1600 (typical aromatic skeletal vibration), 1491 (disubstituted benzene ring), 1222 (antisymmetric C-O-C stretching vibration), 934 (O-C vibration 2 in the oxazine ring with a minor contribution from the phenolic ring), 753 (Ar”
Developing Further Versatility in Benzoxazine Synthesis via Hydrolytic Ring-Opening DOI: 10.3390/polym12030694
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