What absorbs at 1754 cm⁻¹ in an FTIR spectrum?
A band near 1754 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 1754 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 |
|---|---|---|---|
| Carbonyl (C=O) | 9 | 6 | 1,0 |
| Acetate | 6 | 4 | 1,0 |
| Methacrylate | 5 | 4 | 1,0 |
| Carboxyl (COOH) | 4 | 3 | 1,0 |
| Ketone | 3 | 2 | 1,0 |
| Ester | 3 | 2 | 1,0 |
| Amide | 3 | 2 | 1,0 |
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| C-O single bond | 2 | 2 | 1,0 |
| Alkyl C-H | 2 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Anhydride | 1 | 1 | 1,0 |
| Triglyceride | 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 |
|---|---|---|---|
| chitosan | 1754, 1650, 1655 | Acetate, Methacrylate | 1 |
| CMC | 1754, 1423, 1196 | Carbonyl (C=O), Carboxyl (COOH) | 1 |
| lignin | 1754, 1035, 1510 | Methacrylate, Acetate | 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 1754 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
-
Acetate vertrouwen 1,0
“cm-1, For quantification, absorbance of C=O stretch cantered at 1754 between wave number of 1750 - cm-1”
Chandarana 和 Kapupara - 2020 - Fourier Transform Infrared Spectrophotometry An E DOI: 10.30744/brjac.2179-3425.AR-25-2020 -
Alkyl C-H vertrouwen 1,0
“This higher performance 2 cm-1 cm-1 groups were observed at 3024 and 2874 re- -CH is attributed to lower CMC and surface tension of rhamnolipid 3 spectively.Absorptionbandsaround1754cm-1,1649cm-1 and compare to SDS [10] that eventuates in h”
Rhamnolipid as new bio‐agent for cleaning of ultrafiltration membrane fouled by whey DOI: 10.1002/elsc.201700070 -
Anhydride vertrouwen 1,0
“The formation of anhydride linkages can then possibly cm1 cm1 explain the observed strong 1033 peak (CO-O-CO stretching) and the 1754 peak (C = O”
Azrak 等 - 2021 - Controlled Dispersion and Setting of Cellulose Nan DOI: 10.21203/rs.3.rs-376512/v1 -
Carboxyl (COOH) vertrouwen 1,0
“This indicates that acetoacetate process was successful, and the appearance peak at 1710 cm-1 shifting to 1754 cm-1 showed the change of carboxyl group, manifesting the success cm-1 cm-1 to acetoacetate groups.”
Guo 等 - 2020 - The Influence of Compatibility on the Structure an DOI: 10.3390/polym12010056 -
Carbonyl (C=O) vertrouwen 1,0
“(a) (b) Gram-Schmidt curves and absorption of carbonyl compounds (1754 cm-1),”
Enhancing Char Formation and Flame Retardancy of Ethylene-Vinyl Acetate Copolymer (EVA)/Aluminum Hydroxide (ATH) Composites by Grafting Ladder Phenyl/Vinyl Polysilsesquioxane (PhVPOSS) DOI: 10.3390/polym15153312 -
Hydrogen bond vertrouwen 1,0
“In the spectra of ascorbic acid and films containing ascorbic acid, a stretching vibration cm-1 peak at 1754 represents the intramolecular hydrogen bonds of the lactone carbonyl group.”
Investigation of Surface Properties and Free Volumes of Chitosan-Based Buccal Mucoadhesive Drug Delivery Films Containing Ascorbic Acid DOI: 10.3390/pharmaceutics14020345 -
Acetate vertrouwen 1,0
“cm-1 the peak at 2944 can be attributed to -CH stretching, = cm-1 the absorption band at 1754 is due to C O stretching, 2.3 Characterization cm-1.”
Nguyen Thi Thu Trang 等 - 2016 - Hydrolysis of green nanocomposites of poly(lactic DOI: 10.1515/gps-2016-0060 -
Acetate vertrouwen 1,0
“In addicm-1 signals at 1380 (peak 3), 1435 (peak 4) and 1754 cm-1 (peak 5) are attributed to C=O vibration, Raman signals at 1380 (peak 3), 1435 (peak 4) and 1754 (peak 5) are attributed tions of the carbonyl group and asymmetric and symmet”
Antibacterial Property of Cellulose Acetate Composite Materials Reinforced with Aluminum Nitride DOI: 10.3390/antibiotics10111292
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