What absorbs at 848 cm⁻¹ in an FTIR spectrum?
A band near 848 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
Mabilis na sagot
A band near 848 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.
Mga posibleng pagtatalaga ng functional-group
| Grupong functional | Mga sumusuportang katotohanan | Mga nasiping sanggunian | Pinakamataas na kumpiyansa |
|---|---|---|---|
| Alkyl C-H | 4 | 4 | 1.0 |
| Aromatic ring | 2 | 2 | 1.0 |
| Metal oxygen | 2 | 2 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Chlorine | 1 | 1 | 1.0 |
| Oxygen heterocycle | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Sulfur | 1 | 1 | 1.0 |
| Carbon bromine | 1 | 1 | 0.7 |
Ang pagraranggo ay sumasalamin sa naipon na ebidensya ng literatura, hindi isang solong awtoritatibong tuntunin. Palaging kumpirmahin laban sa konteksto ng iyong sample.
Mga posibleng materyales
| Materyal | Sumusuportang mga peak | Mga overlapping na grupo | Mga nasiping sanggunian |
|---|---|---|---|
| polypropylene | 848, 1030, 1600 | Alkyl C-H, Hydroxyl (O-H) | 1 |
| diamond | 848, 1378, 1332 | Alkyl C-H, Hydroxyl (O-H), Aromatic ring | 1 |
| asphalt | 848, 1600, 1376 | Alkyl C-H, Aromatic ring, Hydroxyl (O-H) | 1 |
Ang mga materyales ay ipinapakita lamang kapag ang parehong literatura pool ay sumusuporta sa banda na ito at hindi bababa sa isang karagdagang katangian na tuktok.
Logic ng spectrum
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 848 cm⁻¹ is usually not enough for material identification by itself.
Paggamit sa totoong mundo
Ang uri ng query na ito ay karaniwan sa pagtukoy ng polymer, screening ng hindi kilalang plastic, pag-troubleshoot ng QC, pag-verify ng recycled na materyal, at pagsusuri ng pagtatalaga ng peak na may suporta ng literatura.
Mga karaniwang pagkakamali
- Pagtrato sa isang nakahiwalay na banda bilang patunay ng isang materyal nang hindi sinusuri ang hindi bababa sa isa o dalawang sumusuportang peak.
- Hindi pinapansin ang overlap: maraming functional group ang maaaring mag-ambag malapit sa parehong wavenumber.
- Pag-laktaw sa pagpapatunay kapag ang mga additives, blends, oxidation, o contamination ay maaaring mag-distort ng spectrum.
Payo sa pagpapatunay
Kapag nananatili ang kalabuan, patunayan ang hypothesis gamit ang DSC, GC-MS, o TGA, lalo na para sa mga blend, degraded na sample, at filled polymers.
Literatura sa likod ng mga pagtatalagang ito
-
kumpiyansa 1.0
“The peak at 848 corresponds to symmetric Ti-O stretching vibrations and 6”
Fabrication of the flexible nanogenerator from BTO nanopowders on graphene coated PMMA substrates by sol-gel method DOI: 10.1016/j.matchemphys.2017.02.002 -
Sulfur kumpiyansa 1.0
“Characteristic peak for sulfur detected in co-doped diamond.”
Li 等 - 2017 - Synthesis of n-type semiconductor diamond single c DOI: 10.1088/1757-899X/274/1/012131 -
Metal oxygen kumpiyansa 1.0
“Extra bands with small intensity at around 848 cm-1 and 858 are observed in BaTiO 3-xBi 2O (C1, C2, and C3) ceramics, which are ascribed to 3 the Bi-O vibration.”
Structural and radiation shielding properties of BaTiO3 ceramic with different concentrations of Bismuth and Ytterbium DOI: 10.1016/j.ceramint.2020.08.055 -
kumpiyansa 1.0
“identified at the characteristic peak of 1362.76 The intermediate products showed a sharp peak in the range of cm-1 cm-1 to 1508.45 compared to EbP which indicates that the secondary amines, the N-H stretching band is 847.77”
Tan 等 - 2018 - Synthesis and Characterization of Polybenzoxazine DOI: 10.1063/1.5066866 -
Oxygen heterocycle kumpiyansa 1.0
“The EGMA spectrum exhibits absorption bands at 997, 910 and 848 cm-1 indicating the presence of a C═O group, as associated to the epoxy group, a band at 1730 well as the characteristic bands of PE [37,44].”
A facile route to improve compatibilization of low density polyethylene/poly (-caprolactone) blends DOI: 10.1016/j.polymdegradstab.2022.110111 -
Alkyl C-H kumpiyansa 1.0
“Results and Discussion with the spectrum of DTAT, two new peaks located at 2931 cm-1 and 2840 cm-1 (C-H of -CH2-) appeared and one peak at 848 cm-1 (C-Cl) disappeared in the PETAT spectrum, showing that a reaction had occurred between DTAT”
The Effects of a Macromolecular Charring Agent with Gas Phase and Condense Phase Synergistic Flame Retardant Capability on the Properties of PP/IFR Composites DOI: 10.3390/ma11010111 -
Alkyl C-H kumpiyansa 1.0
“S=O 1024 stretching vibration 964 Trans-C-H wagging vibration (butadiene block) 940 C-H deformation vibration of ring hydrogens 848”
Effect of Phenolic Resin on the Rheological and Morphological Characteristics of Styrene-Butadiene Rubber-Modified Asphalt DOI: 10.3390/ma13245836 -
Aromatic ring kumpiyansa 1.0
“cm-1 Additionally, the relatively intense band at 848 in sample D13 could also be assigned cm-1 to aromatic C-H vibrations.”
Identification of Colourants and Varnishes in a 14th Century Decorated Wood-Carved Door of the Dionysiou Monastery in Mount Athos DOI: 10.3390/coatings11091087
May spectrum ka ba na may ganitong band?
I-upload ang iyong FTIR spectrum at makakuha ng buong interpretasyon na ulat — mga pagtatalaga ng peak na may mga pagsipi ng literatura, pagtutugma ng library, at isang kadena ng ebidensya na may rating ng kumpiyansa — sa loob ng ilang segundo.