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
Quick answer
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.
Mögliche Funktionsgruppenzuweisungen
| Funktionelle Gruppe | Unterstützende Fakten | Zitierte Quellen | Höchstes Vertrauen |
|---|---|---|---|
| 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 |
Das Ranking spiegelt die gesammelte Literatur Evidenz wider, nicht eine einzelne maßgebliche Regel. Bestätigen Sie immer anhand Ihres Probenkontexts.
Possible materials
| Material | Unterstützende Peaks | Overlapping groups | Zitierte Quellen |
|---|---|---|---|
| chitosan | 1754, 1650, 1655 | Acetate, Methacrylate | 1 |
| CMC | 1754, 1423, 1196 | Carbonyl (C=O), Carboxyl (COOH) | 1 |
| lignin | 1754, 1035, 1510 | Methacrylate, Acetate | 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 1754 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.
Literatur hinter diesen Zuweisungen
-
Acetate Vertrauen 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 Vertrauen 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 Vertrauen 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) Vertrauen 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) Vertrauen 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 Vertrauen 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 Vertrauen 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 Vertrauen 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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