What absorbs at 1353 cm⁻¹ in an FTIR spectrum?
A band near 1353 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 6 cited sources
Mabilis na sagot
A band near 1353 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 |
|---|---|---|---|
| Amide | 2 | 2 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Ring structure | 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 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 0 | 1.0 |
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 |
|---|---|---|---|
| GO | 1353, 1720, 1182 | Methoxy (OCH3), Alkyl C-H, Amide | 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 1353 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
-
Amide kumpiyansa 1.0
“cm-1 cm-1 cm-1 cm-1 to 720 (a) and from 1850 to 1300 (b) ranging from 1850 070007-4 In PEI-F-ICJ spectrum, the intensity of bands relative to asymmetric stretching vibration of carbonyl imide (1722 cm-1) cm-1) and C-N stretching vibration (”
Sonego 等 - 2016 - Chemical Changes in Polyetherimide (PEI) Joined by DOI: 10.1063/1.4965539 -
Acetate kumpiyansa 1.0
“The band at 1353 cm-1 can be attributed to C-O-H bending cm-1 cm-1 OH deformation in the band at 1474 [44,45].”
Pore Blocking by Phenolates as Deactivation Path during the Cracking of 4-Propylphenol over ZSM-5 DOI: 10.3390/catal11060721 -
Alkyl C-H kumpiyansa 1.0
“cm-1, C-H new bands at 1353 and 848 corresponding to the Consequently, the resulting hydrogel would assume a cm-1, Cbending vibration, and at 1252 corresponding to the ∼71 composition containing wt % lignin.”
Teng 等 - 2017 - Preparation and Properties of Hydrogels Based on P DOI: 10.1021/acsomega.6b00296 -
Amide kumpiyansa 1.0
“The band at cm-1 corresponds to the amide groups of proteins which could be released by aromatic carbon 1638.38 compounds and carbon double bonds as well as alkene groups (-C-H stretch) [50], while these at 1399.65, 1384.55 cm-1 1081.96cm-1”
Wypij 等 - 2022 - Novel Antibacterial, Cytotoxic and Catalytic Activ DOI: 10.4014/jmb.2205.05006 -
kumpiyansa 0.9
“Explicit assignment: disorder (D-band).”
Optimization and Characterization of Mesoporous Sulfonated Carbon Catalyst and Its Application in Modeling and Optimization of Acetin Production DOI: 10.3390/molecules25225221 -
kumpiyansa 0.9
“Explicitly assigned as D band.”
Extracellular electron uptake from carbon-based π electron surface-donors: oxidation of graphite sheets by Sulfobacillus thermosulfidooxidans probed by Raman and FTIR spectroscopies DOI: 10.1039/c9ra03628h
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