What absorbs at 2010 cm⁻¹ in an FTIR spectrum?
A band near 2010 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
Ātra atbilde
A band near 2010 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.
Iespējamie funkcionālo grupu piešķīrumi
| Funkcionālā grupa | Atbalstošie fakti | Citētie avoti | Augstākā pārliecība |
|---|---|---|---|
| Alkyl C-H | 3 | 2 | 1,0 |
| Adsorbed carbon monoxide | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Nitrile | 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 |
| N h | 1 | 1 | 1,0 |
| Silicon hydride | 1 | 1 | 0,5 |
Rangs atspoguļo uzkrātos literatūras pierādījumus, nevis vienu autoritatīvu noteikumu. Vienmēr apstipriniet atbilstoši parauga kontekstam.
Iespējamie materiāli
| Materiāls | Atbalstošie pīķi | Pārklājošās grupas | Citētie avoti |
|---|---|---|---|
| lignin | 2010, 1035, 1510 | Alkyl C-H | 1 |
| CO | 2010, 1670, 1620 | Adsorbed carbon monoxide, Alkyl C-H | 1 |
Materiāli tiek parādīti tikai tad, ja šo joslu un vismaz vienu papildu raksturīgo pīķi atbalsta tā pati literatūras kopa.
Spektra loģika
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 2010 cm⁻¹ is usually not enough for material identification by itself.
Reālās pasaules izmantošana
Šāda veida vaicājums ir izplatīts polimēru identificēšanā, nezināmas plastmasas skrīningā, kvalitātes kontroles problēmu risināšanā, pārstrādāto materiālu pārbaudē un ar literatūru pamatotā pīķu piešķīruma pārskatā.
Biežākās kļūdas
- Vienas izolētas joslas uzskatīšana par materiāla pierādījumu, nepārbaudot vismaz vienu vai divus atbalsta pīķus.
- Ignorējot pārklāšanos: vairākas funkcionālās grupas var dot ieguldījumu tuvu tam pašam viļņa skaitlim.
- Izlaist validāciju, ja piedevas, maisījumi, oksidācija vai piesārņojums var izkropļot spektru.
Verifikācijas padoms
Ja joprojām pastāv neskaidrība, apstipriniet hipotēzi ar DSC, GC-MS vai TGA, īpaši maisījumiem, noārdītiem paraugiem un pildītiem polimēriem.
Literatūra aiz šiem piešķīrumiem
-
Alkyl C-H pārliecība 1,0
“The bands located at ~2890 ~2010 cm-1 cm-1 and ~1640 are due to the stretching vibration of C-H, and CH groups, associated”
Oxygen vacancies and F+ centre tailored room temperature ferromagnetic properties of CeO2 nanoparticles with Pr doping concentrations and annealing in hydrogen environment DOI: 10.1016/j.jallcom.2020.156079 -
pārliecība 1,0
“medium without fungi showed a strong peak broadening at cm-1, 3,270-3,335 indicating the overlap of N-H and O-Hrelated peaks (Oprea, 2010).”
Khruengsai 等 - 2022 - Biodegradation of Polyester Polyurethane by Embarr DOI: 10.3389/fmicb.2022.874842 -
C c single bond pārliecība 1,0
“1 illustrates the multispectrum fit region from 2010 moment for the vibrational band and is the non-rigid rotor FZ[1Cc cmK1 2m2Cc 3m3)], 1mCc c c to 2250 factor defined by where 1, covering both the P and R branch lines (in our 2 0Z”
Mantz 等 - 2005 - A multispectrum analysis of widths and shifts in t DOI: 10.1016/j.molstruc.2004.11.094 -
C c single bond pārliecība 1,0
“Appearance of new peaks at cm(cid:3)1 due to C-C appearance of shoulder peak at 2010 cm(cid:3)1 and disappearance of peaks at 2010, 767 and 1556 stretching of PEO.”
Influence of high and low dielectric constant plasticizers on the ion transport properties of PEO: NH4HF2 polymer electrolytes DOI: 10.1177/0954008319894043 -
Adsorbed carbon monoxide pārliecība 1,0
“The intensity of the 2010 band increases after annealing the sample to 165 K and concomitant desorption of part of the adsorbed CO.”
Abbet 等 - 2001 - Identification of defect sites on MgO(100) thin fi DOI: 10.1021/ja0157651 -
pārliecība 1,0
“This band shows a shoulder at 2010 assigned by Bazin et al.”
Upgrading the PtCu intermetallic compounds: The role of Pt and Cu in the alloy DOI: 10.1016/j.cattod.2019.11.026 -
pārliecība 1,0
“Deformation of the C-H linkages in the methyl group of O-acetyl moieties Hemicellulose (Mohebby, 2010) 1230-1235 C=O/C-O linkages stretching vibrations (Mohebby, 2010) Hemicellulose”
Dinant 等 - 2019 - Synchrotron FTIR and Raman spectroscopy provide un DOI: 10.1093/jxb/ery396 -
Nitrile pārliecība 1,0
“One can also notice that the C 2H tal columns, respectively, as measured by IASI and averaged 2 and HCN peaks are higher in 2010.”
Duflot 等 - 2015 - Acetylene (C2H2) and hydrogen cyanide (HCN) from I DOI: 10.5194/acp-15-10509-2015
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