What absorbs at 1582 cm⁻¹ in an FTIR spectrum?
A band near 1582 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 1582 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 |
|---|---|---|---|
| Aromatic ring | 6 | 6 | 1,0 |
| Amide | 4 | 4 | 1,0 |
| Alkyl C-H | 4 | 4 | 1,0 |
| Ring structure | 3 | 3 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 2 | 2 | 1,0 |
| N h | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 2 | 1 | 1,0 |
| Lignin | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Urea | 1 | 1 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| C=n | 1 | 0 | 1,0 |
| Carbonate | 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 |
|---|---|---|---|
| epoxy | 1582, 1660, 1735 | Amide, Alkyl C-H, Aromatic ring | 1 |
| cotton | 1582, 1030, 1638 | Alkyl C-H | 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 1582 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
-
Alkyl C-H vertrouwen 1,0
“Gavira and coworkers observed a medium band at 1616 and a 2 cm-1 very weak peak at 1582 in the FTIR spectrum of cytidine 3'-monophosphate (3'-CMP) and assigned them to be the ribose C-H vibrations and in-plane base vibrations, respectively.”
Peng 等 - 2011 - Anharmonic Vibrational Modes of Nucleic Acid Bases DOI: 10.1021/ja205636h -
vertrouwen 1,0
“1649 C-N stretching and N-H bending vibration - - - 1582 1547 1542 of amide II”
Sukprasert 等 - 2020 - Synchrotron FTIR Light Reveals Signal Changes of B DOI: 10.1155/2020/6149713 -
Aromatic ring vertrouwen 1,0
“In addition, weak peaks at 1582 and 1601 in spectrum (d) are indicative of aromatic components' ring stretching.”
Evaluation of the Composition, Thermal and Mechanical Behavior, and Color Changes of Artificially and Naturally Aged Polymers for the Conservation of Stained Glass Windows DOI: 10.3390/polym15122595 -
Aromatic ring vertrouwen 1,0
“vibration aromatic ring 1582 (vw) 1585 (vw) skeletal [41] vibration δas (C-”
De Sa 等 - 2021 - Tracing Poly(Vinyl Acetate) Emulsions by Infrared DOI: 10.3390/polym13213609 -
Carbonyl (C=O) vertrouwen 1,0
“The carbonyl and benzene ring stretching vibrations are exhibited at 1660 cm-1 and 1582 cm-1, respectively.”
Regularities of Encapsulation of Tolfenamic Acid and Some Other Non-Steroidal Anti-Inflammatory Drugs in Metal-Organic Framework Based on -Cyclodextrin DOI: 10.3390/pharmaceutics15010071 -
vertrouwen 1,0
“The band at 1582 attributed to the bending vibration of N-H group has been confirmed in the investigation.”
Haniffa 等 - 2019 - Synergistic effect of (3-Aminopropyl)Trimethoxysil DOI: 10.1016/j.polymdegradstab.2018.11.009 -
C c single bond vertrouwen 1,0
“FTIR: stretching, 1582.21 and 1506.57 for for 2 cm-1 cm-1 C- -C-H -NO stretching, 1334.50 stretching, 3093.43 for aromatic stretching, for aromatic stretching, 2”
Manjare 等 - 2023 - Microwave-Assisted Rapid and Green Synthesis of Sc DOI: 10.1021/acsomega.2c05187 -
Alkyl C-H vertrouwen 1,0
“Also, the peak at 1582 corresponding to bending vibrations of C-H, faded away, indicating that the N-H bonds on cotton-g-PSMA were converted to N-Cl bonds during chlorination .”
Peng 等 - 2021 - Grafted antimicrobial cotton fabrics with N-halami DOI: 10.21203/rs.3.rs-261084/v1
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