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
Snel antwoord
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.
Mogelijke functionele-groeptoewijzingen
| Functionele groep | Ondersteunende feiten | Geciteerde bronnen | Hoogste vertrouwen |
|---|---|---|---|
| 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 |
Ranglijst weerspiegelt cumulatief literatuurbewijs, niet één gezaghebbende regel. Bevestig altijd aan de hand van uw monsterecontext.
Mogelijke materialen
| Materiaal | Ondersteunende pieken | Overlappende groepen | Geciteerde bronnen |
|---|---|---|---|
| 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 |
Materialen worden alleen getoond wanneer dezelfde literatuurpool deze band en ten minste één extra karakteristieke piek ondersteunt.
Spectrumlogica
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.
Gebruik in de praktijk
Dit type query komt vaak voor bij polymeeridentificatie, screening van onbekende kunststoffen, probleemoplossing bij QC, verificatie van gerecycled materiaal en literatuurondersteunde beoordeling van piektoewijzing.
Veelgemaakte fouten
- Het behandelen van een enkele geïsoleerde band als bewijs van een materiaal zonder ten minste een of twee ondersteunende pieken te controleren.
- Overlap negeren: meerdere functionele groepen kunnen bijdragen rond hetzelfde golfgetal.
- Validatie overslaan wanneer additieven, mengsels, oxidatie of verontreiniging het spectrum kunnen verstoren.
Advies voor verificatie
Wanneer dubbelzinnigheid blijft bestaan, valideer de hypothese met DSC, GC-MS of TGA, vooral voor mengsels, gedegradeerde monsters en gevulde polymeren.
Literatuur achter deze toewijzingen
-
Phosphate (PO4) vertrouwen 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) vertrouwen 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 vertrouwen 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 vertrouwen 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 vertrouwen 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 -
vertrouwen 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 vertrouwen 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 -
vertrouwen 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
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