What absorbs at 732 cm⁻¹ in an FTIR spectrum?
A band near 732 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 7 cited sources
Snel antwoord
A band near 732 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 |
|---|---|---|---|
| Alkyl C-H | 2 | 2 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Protein | 1 | 1 | 1,0 |
| Chlorine | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 0,9 |
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 | 732, 1650, 1655 | Alkyl C-H | 1 |
| zeolite | 732, 1013, 1245 | Alkyl C-H | 1 |
| microplastics | 732, 1643, 1614 | Alkyl C-H, Aromatic ring | 1 |
| PCL | 732, 1751, 1724 | Alkyl C-H | 1 |
| polyaniline | 732, 1565, 1570 | Aromatic ring, Alkyl C-H | 1 |
| nanocomposites | 732, 1717, 1630 | 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 732 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
-
C-S single bond vertrouwen 1,0
“The weak bands at 732, 634 and cm-1 researchers [48-51] who have also reported that the car570 are due C-S stretching vibration of bonyl groups from amino acid residues or protein strongly dibenzothiophene.”
Green synthesis of bimetallic Pt@Cu nanostructures for catalytic oxidative desulfurization of model oil DOI: 10.1007/s40097-017-0223-8 -
Alkyl C-H vertrouwen 1,0
“The bands that appeared in CeraSeal were similar to those of cm-1, cm-1, cm-1, cm-1 iRoot with bands at 732 874 945 and 1459 showing the presence cm-1 of C-H bending, while the band at 1350 represented S=O stretching.”
Assiry 等 - 2023 - Microstructural and Elemental Characterization of DOI: 10.3390/app13074517 -
Metal oxygen vertrouwen 1,0
“The spectrum of the PANI@TiO2 nanocomposite showed a characteristic band at 732 cm-1, which was attributed to the Ti-O stretching band [35].”
Bekhoukh 等 - 2021 - Development, Investigation, and Comparative Study DOI: 10.3390/polym13193344 -
vertrouwen 1,0
“Pyrolysis Process of MP cm-1 Comparing the pyrolysis of MP with a series of pyrolysis of a single polymer, the 600 K indicated benzene and C-Cl stretching at 732 [31], implying that intermediates such process with interactions and intermedi”
Pyrolysis Process of Mixed Microplastics Using TG-FTIR and TED-GC-MS DOI: 10.3390/polym15010241 -
Protein vertrouwen 1,0
“A small peak detected at 732 that again does not exist in the spectrum of the fibers before protein immobilization corresponds to the amid IV groups amid IV groups of the proteins, which is in line with previously reported results [42,48].”
Hosseini 等 - 2017 - Polymethacrylate Coated Electrospun PHB Fibers as DOI: 10.3390/s17102292 -
Alkyl C-H vertrouwen 1,0
“cm-1, The most intense acridine band, not overlapped with the zeolite bands, at about 732 corresponds to C-H out-of-plane bending vibration, and it is visible in the spectrum of the cm-1 impregnated zeolite sample Acr/Y, but it is shifted b”
Rankovic 等 - 2023 - Can Zeolite-Supporting Acridines Boost Their Antic DOI: 10.3390/jfb14030173 -
Carbonyl (C=O) vertrouwen 0,9
“Explicit assignment: 'peak absorption due to 732 PCL -C=O'.”
Joseph 等 - 2011 - Optimum Blend of Chitosan and Poly-(epsilon-caprol DOI: 10.1007/s11947-009-0203-1
Heeft u een spectrum met deze band?
Upload uw FTIR-spectrum en ontvang binnen enkele seconden een volledig interpretatierapport — piektoewijzingen met literatuurverwijzingen, bibliotheekovereenkomsten en een met vertrouwen beoordeelde bewijsketen.