What absorbs at 3072 cm⁻¹ in an FTIR spectrum?
A band near 3072 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
Mabilis na sagot
A band near 3072 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 | 5 | 5 | 1.0 |
| Aromatic ring | 2 | 2 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 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 |
|---|---|---|---|
| silk fibroin | 3072, 1050, 1511 | Amide, Alkyl C-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 3072 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
-
Alkyl C-H kumpiyansa 1.0
“The band at 3072 corresponding to originating from the cm-1, as(=CH) of the vinyl groups.”
Ilic-Stojanovic 等 - 2018 - Thermosensitive hydrogels for modified release of DOI: 10.1080/00914037.2017.1354202 -
Alkyl C-H kumpiyansa 1.0
“This observation is confirmed by the presence of the cm-1, signals from C-H stretching vibrations located at 3072, 2947, and 2874 observed in figure 2(c), which also correspond to gelatin (M.”
Nieto-Villena 等 - 2018 - Infrared Ellipsometry Analysis of Heritage Photogr DOI: 10.1080/00393630.2018.1476962 -
Alkyl C-H kumpiyansa 1.0
“Lastly, to complement at 3072 cm-1 for Poly(Ani-AMPS), ascribed to C-H stretching vibrations of the aromatic”
Role of the Anilinium Ion on the Selective Polymerization of Anilinium 2-Acrylamide-2-methyl-1-propanesulfonate DOI: 10.3390/polym13142349 -
Alkyl C-H kumpiyansa 1.0
“40 140 240 340 440 540 640 cm-1), 3500 the stretching vibrations of = C-H and C Ar-H Temperature/°C cm-1), (3072 the stretching vibrations of C-H 012345 cm-1), (2720-2990 the stretching vibrations of C=O”
Thermal studies on the starch-g-copolymers prepared from two terpene acrylate monomers under oxidative conditions DOI: 10.1007/s10973-019-08036-8 -
Aromatic ring kumpiyansa 0.9
“Explicit assignment: C-H region at 3072 for aromatic stretching”
Coumarin–carbazole based functionalized pyrazolines: synthesis, characterization, anticancer investigation and molecular docking DOI: 10.1039/d1ra03970a -
Alkyl C-H kumpiyansa 0.8
“ν(C-H) stretching.”
A Hybrid {Silk@Zirconium MOF} Material as Highly Efficient AsIII-sponge DOI: 10.1038/s41598-020-66091-w -
Hydroxyl (O-H) kumpiyansa 0.7
“OH harmonic stretching frequency”
Growth, structure, Hirshfeld surface and spectroscopic properties of 2-amino-4-hydroxy-6-methylpyrimidinium-2,3-pyrazinedicorboxylate single crystal DOI: 10.1016/j.molstruc.2017.11.019
May spectrum ka ba na may ganitong band?
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