What absorbs at 1190 cm⁻¹ in an FTIR spectrum?
A band near 1190 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 1190 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.
Iespējamie funkcionālo grupu piešķīrumi
| Funkcionālā grupa | Atbalstošie fakti | Citētie avoti | Augstākā pārliecība |
|---|---|---|---|
| C-O single bond | 6 | 5 | 1,0 |
| Methacrylate | 5 | 4 | 1,0 |
| Acetate | 5 | 4 | 1,0 |
| Methoxy (OCH3) | 5 | 4 | 1,0 |
| C c single bond | 3 | 3 | 1,0 |
| Alkyl C-H | 3 | 3 | 1,0 |
| Aromatic ring | 3 | 3 | 1,0 |
| Ester | 2 | 2 | 1,0 |
| Nitrogen heterocycle | 2 | 2 | 1,0 |
| Phosphate (PO4) | 2 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Lignin | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Sulfonate | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Fluorine (C-F) | 1 | 1 | 0,7 |
| Metal oxygen | 1 | 0 | 1,0 |
Rangs atspoguļo uzkrātos literatūras pierādījumus, nevis vienu autoritatīvu noteikumu. Vienmēr apstipriniet atbilstoši parauga kontekstam.
Possible materials
| Materiāls | Atbalstošie pīķi | Overlapping groups | Citētie avoti |
|---|---|---|---|
| pMMA | 1190, 1722, 1383 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| polypyrrole | 1190, 1700, 400 | Methacrylate, Acetate | 1 |
| PCL | 1190, 1751, 1724 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| polycaprolactone | 1190, 1580, 1751 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| PPy | 1190, 1043, 910 | Methoxy (OCH3), Methacrylate, C-O single bond | 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 1190 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.
Literatūra aiz šiem piešķīrumiem
-
Phosphate (PO4) pārliecība 1,0
“On the other hand, the stretchH 1190cm(cid:3)1 ing modes of P-O bonds are located above at low pH, The energies associated with the first step, i.e., the one that 1160cm(cid:3)1 OH(cid:3), and above implies the releasing of one or two at hi”
Quantum chemical study on surface complex structures of phosphate on gibbsite DOI: 10.1016/j.saa.2015.03.013 -
Phosphate (PO4) pārliecība 1,0
“The formation of covalent 1270cm-1, spectra: (PO 2) band near (PO 2) band at P-O-Cu linkages is easier in the polyphosphate glasses as s 1190cm-1, P-O1100cm-1, absorption band near about than in the metaphosphate glasses.”
Shih 等 - 2003 - P-31 MAS-NMR and FTIR analyses on the structure of DOI: 10.1016/S0254-0584(03)00098-1 -
Aromatic ring pārliecība 1,0
“combination band at 1190 that includes the bending of benzene ring (C-C-H), asymmetrical stretching of thiophene ring a(C-C-C and C-C-S), symmetrical cm-1, stretching of benzene ring s(C-C-C);”
Aguilar-Rodriguez 等 - 2023 - Microanalytical Characterization of an Innovative DOI: 10.3390/molecules28020564 -
Ring structure pārliecība 1,0
“The band at 1650 cm-1 has been assigned to the carbonyl stretching vibration, a number of skeletal ring vibrations at 1598, 1490 and 1413 cm-1, the asymmetric stretching of ether group at 1277 and 1190 cm-1, the aromatic hydrogen in-plane d”
Mechano-Chemical Properties of Electron Beam Irradiated Polyetheretherketone DOI: 10.3390/polym14153067 -
Sulfonate pārliecība 1,0
“the peaks at 1190 cm-1 cm-1 and 985 can be assigned to the asymmetric and symmetric stretching of SO 3.”
Anis 等 - 2023 - Studies on Polybenzimidazole and Methanesulfonate DOI: 10.3390/polym15132821 -
pārliecība 1,0
“cm-1, to 1550 or even 1570 the pyrrole ring C-N stretching band formed a maximum cm-1, cm-1, at 1475 C-H or C-N in the in-plane deformation band shifted to 1320 the cm-1, N-H+ pyrrole ring breathing band shifted to 1190 the deformation shif”
Polypyrrole Aerogels: Efficient Adsorbents of Cr(VI) Ions from Aqueous Solutions DOI: 10.3390/gels9070582 -
Aromatic ring pārliecība 1,0
“A peak appears at about 1190 showing that the aromatic structure of lignin has”
Castro 等 - 2020 - Pretreatment Affects Activated Carbon from Piassav DOI: 10.3390/polym12071483 -
pārliecība 1,0
“cm-1, C=O (symmetric), stretching at 1721 at 2866 cm-1, C-O-C stretching C-C and C-O stretching at 1721 cm-1, cm-1 and O-C-O stretching at 1190 [4,23].”
Preparation of electrospun polycaprolactone nanofiber mats loaded with microalgal extracts DOI: 10.1002/elsc.201900009
Vai jums ir spektrs ar šo joslu?
Augšupielādējiet savu FTIR spektru un dažu sekunžu laikā iegūstiet pilnu interpretācijas ziņojumu — maksimumu piešķīrumus ar literatūras atsaucēm, bibliotēku saskaņošanu un pārliecības līmeņa pierādījumu ķēdi.