What absorbs at 984 cm⁻¹ in an FTIR spectrum?
A band near 984 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 984 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-O single bond | 2 | 2 | 1.0 |
| Nucleic acid | 2 | 2 | 1.0 |
| Silicon-oxygen (Si-O) | 2 | 0 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Phosphorus | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 0.9 |
| S eq o | 1 | 1 | 0.9 |
| C c single bond | 1 | 0 | 1.0 |
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 |
|---|---|---|---|
| serum | 984, 1656, 1122 | Methoxy (OCH3) | 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 984 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
-
Siloxane (Si-O-Si) 置信度 1.0
“The absorption peaks at 984 cm(cid:1)1 are due to siloxane functionality.”
Synthesis of UV-curable difunctional silane monomer based on 3-methacryloxy propyl trimethoxysilane (3-MPTS) and its UV-curing characteristics and thermal stability DOI: 10.1002/app.31266 -
C-O single bond 置信度 1.0
“InmuchofthefuelcellliteratureaddressingtheFTIRspectrumofNafion,thedoublet cm-1 4+ of bands at 984 and 968 have been assigned to the two ether groups of the permepermeance values obtained fromair-aged samples.The NH branched side chain.”
A Mechanistic Study of Perfluorosulfonic Acid Membrane Water Permeance Degradation in Air DOI: 10.1149/2.0141806jes -
Nucleic acid 置信度 1.0
“1120cm-1 cm-1, specific IR spectral bands at and 984 which are particular peaks considered diagnostic of the contribution of RNA in the nucleic acid backbone vibrations [43-45].”
Synchrotron-Based Fourier-Transform Infrared Micro- Spectroscopy of Cerebrospinal Fluid from Amyotrophic Lateral Sclerosis Patients Reveals a Unique Biomolecular Profile DOI: 10.3390/cells12111451 -
Phosphate (PO4) 置信度 1.0
“cm-1 Finally, the band at 984 corresponds to the phosphate groups due to phosphorylated sites of CMP (Burgardt et al., 2014b;”
Iron-caseinglycomacropeptide complexes: characterization and application in beverages DOI: 10.1016/j.foodres.2020.109772 -
Ring structure 置信度 1.0
“Furthermore, the independent sample cm-1 t-test revealed a significant difference only at the band 984 assigned to uracil ring motions of RNA [51] (Figure 4C).”
Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) Spectroscopy Discriminates the Elderly with a Low and High Percentage of Pathogenic CD4+ T Cells DOI: 10.3390/cells11030458 -
Acetate 置信度 1.0
“1214.5 Similarly, a peak at 984.25 was found to be due to the stretching of the C-O-C (ether functional group).”
Fabrication, In Vitro, and In Vivo Assessment of Eucalyptol-Loaded Nanoemulgel as a Novel Paradigm for Wound Healing DOI: 10.3390/pharmaceutics14091971 -
S eq o 置信度 0.9
“IR: 984 symmetric stretch.”
Nikpassand 等 - 2017 - Green synthesis of novel 2-pyrazolyl-1,3-thiazolid DOI: 10.1515/hc-2017-0124 -
Alkene (C=C) 置信度 0.9
“Same as above.”
Park 等 - 2013 - Curing Behaviors of Transparent Aliphatic Epoxy Ac DOI: 10.7317/pk.2013.37.3.302
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