What absorbs at 1423 cm⁻¹ in an FTIR spectrum?
A band near 1423 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
Përgjigje e shpejtë
A band near 1423 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.
Caktime të mundshme të grupeve funksionale
| Grup funksional | Fakte mbështetëse | Burimet e cituara | Besueshmëri e lartë |
|---|---|---|---|
| Alkyl C-H | 16 | 14 | 1,0 |
| Methacrylate | 4 | 4 | 1,0 |
| Carboxyl (COOH) | 4 | 4 | 1,0 |
| Acetate | 4 | 4 | 1,0 |
| C-O single bond | 4 | 4 | 1,0 |
| Carbohydrate | 4 | 3 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Methoxy (OCH3) | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Ketone | 2 | 2 | 1,0 |
| Ester | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 2 | 2 | 1,0 |
| Hydrogen bond | 2 | 2 | 1,0 |
| Lignin | 2 | 2 | 1,0 |
| N h | 2 | 2 | 1,0 |
| Aromatic ring | 2 | 1 | 1,0 |
| Alkene (C=C) | 2 | 1 | 1,0 |
| Silicate | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Nitrate | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 0,7 |
| Ring structure | 1 | 0 | 1,0 |
Renditja pasqyron provat e grumbulluara të literaturës, jo një rregull të vetëm autoritar. Gjithmonë konfirmoni në kontekstin e mostrës suaj.
Materialet e mundshme
| Material | Maja mbështetëse | Grupe të mbivendosura | Burimet e cituara |
|---|---|---|---|
| CMC | 1423, 1196, 850 | Alkyl C-H, Carboxyl (COOH) | 2 |
| Cellulose | 1423, 1735, 1650 | Alkyl C-H, Acetate, Methacrylate | 1 |
| biochar | 1423, 1640, 1115 | Alkyl C-H, Methacrylate, Acetate | 1 |
Materialet shfaqen vetëm kur i njëjti grup literature mbështet këtë brez dhe të paktën një pik karakteristik shtesë.
Logjika e spektrit
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 1423 cm⁻¹ is usually not enough for material identification by itself.
Përdorimi në botën reale
Ky lloj pyetjeje është i zakonshëm në identifikimin e polimereve, skriningun e plastikës së panjohur, zgjidhjen e problemeve të kontrollit të cilësisë, verifikimin e materialeve të ricikluara dhe rishikimin e caktimit të pikut të mbështetur nga literatura.
Gabimet e zakonshme
- Trajtimi i një brezi të izoluar si provë e një materiali pa kontrolluar të paktën një ose dy pika mbështetëse.
- Duke injoruar mbivendosjen: grupe të shumta funksionale mund të kontribuojnë afër të njëjtit numër valor.
- Kalimi i vërtetimit kur aditivët, përzierjet, oksidimi ose ndotja mund të shtrembërojnë spektrin.
Këshillë për verifikim
Kur mbetet paqartësi, verifiko hipotezën me DSC, GC-MS ose TGA, veçanërisht për përzierjet, mostrat e degraduara dhe polimerët e mbushur.
Literatura pas këtyre caktimeve
-
Alkyl C-H besueshmëri 1,0
“The bands around cm-1 1423 and 1325 are assigned to -CH scissoring and hydroxyl group (-OH) bending vibration, 2 1061cm-1 respectively.”
Eliza 等 - 2015 - Carboxymethyl Cellulose (CMC) from Oil Palm Empty DOI: 10.1088/1742-6596/622/1/012026 -
Amide besueshmëri 1,0
“1423 The peak corresponding to the C-N bond and then it separated into its constituent ions leading to the formation of AgX nanoparticles [28].”
Lakshmanamoorthy 和 Manivannan - 2022 - Ionic liquids assist synthesis of AgAgX (X = Cl, DOI: 10.1007/s10854-021-06774-w -
Alkyl C-H besueshmëri 1,0
“cm(cid:1)1, C-H bending at 1635 and 1703 stretching at 1423 and cm(cid:1)1, cm(cid:1)1 C]O C-H 1428 stretching at 1081 and bending at 8/13/2023 3.0 823cm(cid:1)1 areshiedin theanti-Alzheimer's drugs-AIL complex.”
Multi-spectroscopic monitoring of molecular interactions between an amino acid-functionalized ionic liquid and potential anti-Alzheimer's drugs DOI: 10.1039/d0ra06323a -
Alkyl C-H besueshmëri 1,0
“The absorption peak at 1423cm(cid:1)1, increasing ammonia nitrogen concentrations, the protein content assigned to H-C-H deformation vibrations, suggested was reduced in both the LB-EPS and the TB-EPS.”
Application of biochar in a CIC reactor to relieve ammonia nitrogen stress and promote microbial community during food waste treatment DOI: 10.1016/j.jclepro.2018.10.269 -
Alkyl C-H besueshmëri 1,0
“(C-H stretching reported that the frequencies of allicin in FTIR spectra were 3083 cm-1 2), 2978 cm-1 (C-H stretching symmetric of =CH 2),1634 cm-1 (a medium asymmetric of =CH intensity band originating from stretching of terminal C=C bond”
Tasci 等 - 2016 - Determination of alliin and allicin in the plant o DOI: 10.17660/ActaHortic.2016.1143.19 -
Hydroxyl (O-H) besueshmëri 1,0
“The band at 1423 and 1332 was assigned to O-H stretching in-plane and cm-1 C-H stretching in symmetric of CMC.”
REMOVAL OF METAL IONS FROM AQUEOUS SOLUTIONS USING CARBOXYMETHYL CELLULOSE/SODIUM STYRENE SULFONATE GELS PREPARED BY RADIATION GRAFTING DOI: 10.1016/j.carbpol.2016.09.049 -
Alkyl C-H besueshmëri 1,0
“The peak centered at 1423 175 (CH 2-CH bending) is a characteristic property of melanin.”
Isolation and characterization of melanin from black garlic and sepia ink DOI: 10.1016/j.lwt.2018.09.033 -
Acetate besueshmëri 1,0
“(guayacil-syringil) (1422.6 A bond valence vibration symmetric C-O-C aromatic cm-1.”
Belo 等 - 2018 - Development of a Black Liquor Electrolyzer for Lig DOI: 10.1149/08604.0003ecst
Keni një spektër me këtë brez?
Ngarkoni spektrin tuaj FTIR dhe merrni një raport të plotë interpretimi — caktim i pikut me citime literaturë, përputhje biblioteke dhe një zinxhir provash të vlerësuar me besueshmëri — në sekonda.