What absorbs at 1490 cm⁻¹ in an FTIR spectrum?
A band near 1490 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
Mga posibleng pagtatalaga ng functional-group
| Grupong functional | Mga sumusuportang katotohanan | Mga nasiping sanggunian | Pinakamataas na kumpiyansa |
|---|---|---|---|
| Aromatic ring | 9 | 8 | 1.0 |
| Carboxyl (COOH) | 7 | 7 | 1.0 |
| Amide | 6 | 6 | 1.0 |
| Alkene (C=C) | 5 | 5 | 1.0 |
| Alkyl C-H | 5 | 5 | 1.0 |
| N h | 5 | 5 | 1.0 |
| Ring structure | 5 | 5 | 1.0 |
| Nitrogen heterocycle | 5 | 4 | 1.0 |
| Bromine | 4 | 2 | 1.0 |
| C c single bond | 3 | 3 | 1.0 |
| Secondary amine | 3 | 3 | 1.0 |
| N-O bond | 2 | 2 | 1.0 |
| C=n | 2 | 2 | 1.0 |
| Carbonyl (C=O) | 2 | 2 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| C n single bond | 2 | 2 | 1.0 |
| Lewis acid site | 2 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Carbonate | 1 | 1 | 1.0 |
| N eq o | 1 | 1 | 1.0 |
| N n bond | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Lipid | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Lignin | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Methyl | 1 | 1 | 0.9 |
| Quaternary ammonium | 1 | 1 | 0.9 |
| Sulfur heterocycle | 1 | 1 | 0.8 |
| Bronsted acid site | 1 | 0 | 0.9 |
Ang pagraranggo ay sumasalamin sa naipon na ebidensya ng literatura, hindi isang solong awtoritatibong tuntunin. Palaging kumpirmahin laban sa konteksto ng iyong sample.
Literatura sa likod ng mga pagtatalagang ito
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Alkyl C-H kumpiyansa 1.0
“As shown in the graph, the SBS-modified binder did not show bands at 1490 cm-1 and 1540 wavenumbers representing deformation and stretching vibrations of the cm-1 C-H bond, but the wavenumbers of 700 and 966 representing polybutadiene and M”
Analysis of the Properties of Modified Asphalt Binder by FTIR Method DOI: 10.3390/ma15165743 -
Amide kumpiyansa 1.0
“Other bands were seen at 1490 and 1560 [FU pte indicating of amid II, C-N stretching and N-H bending [38].”
Rafe 和 Razavi - 2015 - Effect of Thermal Treatment on Chemical Structure DOI: 10.1080/10942912.2014.999864 -
Amide kumpiyansa 1.0
“cm-1 cm-1 plan, 802 corresponds to para di-substituted ring, 1119 is due to delocalization of 7 cm-1 cm-1 electrons in aromatic ring, 1298 corresponds to C - N stretching vibration, 1490 due cm-1”
Antistatic and Dielectric properties of one-dimensional Al2+:Nd2O3 nanowire doped polyaniline nanocomposites for electronic application DOI: 10.1016/j.sna.2018.07.018 -
kumpiyansa 1.0
“The absorption band at 1000 cm-1 and 1490 cm-1 shows the characteristics of tertiary amine and diethyl”
Room temperature self-healing natural rubber based on ionic supramolecular network DOI: 10.1063/5.0016183 -
Amide kumpiyansa 1.0
“LLM confirmed rule peak-group candidate”
Simple quantitative analysis of Escherichia coli K-12 internalized in baby spinach using Fourier Transform Infrared spectroscopy DOI: 10.1016/j.ijfoodmicro.2010.09.013 -
Lignin kumpiyansa 1.0
“The cm-1 cm-1 peak at 1490 and 1298 are typical of lignin (Biagini et al., 2006, Chan and Wang, 2016a, Liu et al., 2015, Matias et al., 2000, Zancada et al., 2003, Liu et al., 2020, Wang et al., 2020).”
Optimization of primary sewage sludge and coal lignite by microwave assisted pyrolysis for the production of bio oil DOI: 10.1080/09593330.2020.1797903 -
C=n kumpiyansa 1.0
“Associated with C=N and C=C stretching vibrations of quinone and benzene rings.”
Synthesis of Uniform Polyaniline Nanofibers through Interfacial Polymerization DOI: 10.3390/ma5081487 -
Lewis acid site kumpiyansa 1.0
“The spectra also show a band at 1490 150 common to a vibration mode of pyridine coordinated to the catalysts' Lewis acid sites and”
TiO2 Catalyzed Dihydroxyacetone (DHA) Conversion in Water: Evidence That This Model Reaction Probes Basicity in Addition to Acidity DOI: 10.3390/molecules27238172
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