What absorbs at 1332 cm⁻¹ in an FTIR spectrum?
A band near 1332 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 1332 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.
Möjliga identifieringar av funktionella grupper
| Funktionell grupp | Stödjande fakta | Citerade källor | Högsta förtroende |
|---|---|---|---|
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| C-O single bond | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Boron nitrogen | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| S eq o | 1 | 1 | 0,9 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Possible materials
| Material | Stödjande toppar | Overlapping groups | Citerade källor |
|---|---|---|---|
| diamond | 1332, 1378, 1545 | Methoxy (OCH3) | 2 |
| PVA | 1332, 1660, 2930 | Acetate, Methacrylate, C-O single bond | 1 |
| ZnO | 1332, 1400, 3430 | Acetate, Methacrylate, C-O single bond | 1 |
| PVC | 1332, 834, 1195 | Methoxy (OCH3), Methacrylate, Acetate | 1 |
| ZnO nanoparticles | 1332, 1219, 1726 | Methacrylate, Acetate, C-O single bond | 1 |
| graphite | 1332, 1640, 1326 | Methacrylate, Acetate, 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 1332 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.
Litteratur bakom dessa identifieringar
-
C c single bond förtroende 1,0
“Isoindole stretching 1372 Isoindole stretching C-C 1332 Pyrrole stretching coupled with aza rocking C-H 1256 deformation C-H 1164 deformation”
Gharagozlou 和 Naghibi - 2018 - Sensitization of ZnO nanoparticles by metal-free p DOI: 10.1016/j.jlumin.2017.12.020 -
Acetate förtroende 1,0
“There is no sharp cm-1 (structural OH and adsorbed water), a small peak at 1100 (sp 3and isolated characteristic Raman peak at 1332 cm-1 cm-1 due to C-O, and a large peak at around 815 bonded carbon) which is related to a nanodiamond phase”
Ito 等 - 2021 - Assessing the debris generated by the small carry- DOI: 10.2343/geochemj.2.0632 -
förtroende 1,0
“cm-1 100 h 5 the Raman peak at 1332 associated with Fano interference 200 h 6.5 [27-29] in the boron doped diamond films was observed only in 400 h”
Jagannadham 等 - 2007 - Neutron transmutation of B-10 doped diamond DOI: 10.1016/j.diamond.2006.03.019 -
Boron nitrogen förtroende 1,0
“of 745 and when the h-BN addition h-BN additive located at Furthercontent reaches 0.8wt% is interesting, which results more, the Raman peaks shift down to 1331.74 and”
B–C Bond in Diamond Single Crystal Synthesized with h-BN Additive at High Pressure and High Temperature DOI: 10.1088/0256-307X/33/2/028101 -
Alkyl C-H förtroende 1,0
“The C-H stretching band on neighboring CHCl groups at and 1332 cm-1 were ascribed to hydrothermal process [27].”
Understanding Hydrothermal Dechlorination of PVC by Focusing on the Operating Conditions and Hydrochar Characteristics DOI: 10.3390/app7030256 -
Amide förtroende 1,0
“cm-1 peak increases obviously after HPHT and the 1282 cm-1 peak,23 and the results are absorption coefficient of 1332 treatment, these two peaks are respectively attributed to C N+ listed in Table.”
Miao 等 - 2019 - High-pressure and high-temperature treatment of N- DOI: 10.1039/C9CE00472F. -
Amide förtroende 1,0
“In order to check if the frequency of Characteristic vibration frequencies observed in our films cm(cid:2)1 and reduces due C-N stretching mode lies around 1332”
Titus 等 - 2006 - Nitrogen and hydrogen related infrared absorption DOI: 10.1016/j.tsf.2005.12.062 -
Alkyl C-H förtroende 1,0
“The effect apportioned between cm-1 cm-1 at of 921 assigned to CH2 rocking and the peak at 1332 MWCNTs on some characterizing IR bands can be taken correspond to (CH+OH) bending [13].”
Characterization and some physical studies of PVA/PVP filled with MWCNTs DOI: 10.1016/j.jmrt.2018.04.023
Har du ett spektrum med detta band?
Ladda upp ditt FTIR-spektrum och få en fullständig tolkningsrapport – toppidentifieringar med litteraturhänvisningar, biblioteksmatchningar och en förtroendebedömd beviskedja – på sekunder.