What absorbs at 968 cm⁻¹ in an FTIR spectrum?
A band near 968 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 968 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.
可能性のある官能基アサイン
| 官能基 | 裏付け事実 | 引用元 | 最高信頼度 |
|---|---|---|---|
| Alkyl C-H | 6 | 6 | 1.0 |
| Alkene (C=C) | 4 | 4 | 1.0 |
| Phosphate (PO4) | 3 | 2 | 1.0 |
| Silanol (Si-OH) | 2 | 2 | 1.0 |
| Secondary amine | 2 | 2 | 1.0 |
| C n single bond | 2 | 2 | 1.0 |
| Amide | 2 | 2 | 1.0 |
| C c single bond | 2 | 2 | 1.0 |
| Carbohydrate | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 2 | 2 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Nucleic acid | 1 | 1 | 1.0 |
| Nitro (NO2) | 1 | 1 | 1.0 |
| N-O bond | 1 | 1 | 1.0 |
| Phosphorus | 1 | 1 | 1.0 |
| Adsorbed carbon monoxide | 1 | 1 | 1.0 |
| Chitosan | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| Fatty acid | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
ランキングは蓄積された文献証拠を反映しており、単一の権威あるルールではありません。常にサンプルのコンテキストと照合して確認してください。
Possible materials
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 968 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.
これらのアサインの根拠となる文献
-
Amide 信頼度 1.0
“2000cm-1, 1.21mgg-1 baseline established in for a ChlorThe absorption bands of Chlorpyrifos are located at 1549, pyrifosstandardandthenoisemeasuredinthesameregionfor 968cm-1, 1412, 1339, 1165, 1088, 1025 and due to C N a blank spectrum and”
Armenta 等 - 2005 - A validated and fast procedure for FTIR determinat DOI: 10.1016/j.talanta.2005.03.008 -
Alkene (C=C) 信頼度 1.0
“and quantified by using Fourier-transform infrared (FTIR) spectroscopy, in the mid-region of 400-4000 cm-1, The FTIR analysis shows that two oil extracts (with and without heat) present a well-defined peak at 968 which represents the double”
Ariza Ortega 等 - 2012 - Analysis of trans fatty acids production and squal DOI: 10.2478/s11532-012-0104-4 -
信頼度 1.0
“cm(cid:1)1, cm(cid:1)1, cm(cid:1)1 Ti-BEA shows clear peaks at 968 960 and 943 as previously described [20].”
Effect of water treatment on Sn-BEA zeolite: Origin of 960 cm-1 FTIR peak DOI: 10.1016/j.micromeso.2015.02.012 -
Acetate 信頼度 1.0
“1033 -C-O Stretching Phospholipid w w w w - 968 Bending (out of plane) Phosphatidylcholine w w m m m -CH = CH-(trans)”
Gao 等 - 2017 - Technical note Characterization of lipid constitu DOI: 10.2527/jas2016.1332 -
Acetate 信頼度 1.0
“-b 19 1072-1043 -C-O Stretching 1033a 20 1043-1006 -C-O Stretching -HC@CH968a 21 1006-929 (trans)”
Rapid evaluation of oxidised fatty acid concentration in virgin olive oil using Fourier-transform infrared spectroscopy and multiple linear regression DOI: 10.1016/j.foodchem.2010.06.054 -
Alkyl C-H 信頼度 1.0
“2 to 2922 cm-1 (as shown in Figure 4b) and 2921 cm-1 (as indicated in Figure 4c) in the hydrochar, while cm-1 cm-1 shifted to 2922 (as shown in Figure 4b) and 2921 (as indicated in Figure 4c) in the hydrochar, the skeletal vibration at 1255”
Understanding Hydrothermal Dechlorination of PVC by Focusing on the Operating Conditions and Hydrochar Characteristics DOI: 10.3390/app7030256 -
Alkyl C-H 信頼度 1.0
“the peak of 1655.00 the olefinic C-H out of plane bending vibration at the band of 968.22 cm-1 Furthermore, the peak at 3082.50 corresponds to the =C-H stretching vibrations of both the allyl group and the cm-1 aromatic ring, whereas the ab”
Tan 等 - 2018 - Synthesis and Characterization of Polybenzoxazine DOI: 10.1063/1.5066866 -
Alkene (C=C) 信頼度 1.0
“On the other hand, carboxymethyl-ethanolamine was cm-1 968 which is a marker peak of trans double bonds in [26] as a biomarker of phospholipid modification during reported unsaturated fatty acids [14] which may be formed mainly after the Ma”
Optical screening of diabetes mellitus using non-invasive Fourier-transform infrared spectroscopy technique for human lip DOI: 10.1016/j.jpba.2012.12.009
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