What absorbs at 1491 cm⁻¹ in an FTIR spectrum?
A band near 1491 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
可能的官能基指派
| 官能基 | 支持事實 | 引用來源 | 最高信心 |
|---|---|---|---|
| Aromatic ring | 5 | 5 | 1.0 |
| Carboxyl (COOH) | 3 | 2 | 1.0 |
| Alkene (C=C) | 2 | 2 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
排名反映累積的文獻證據，而非單一權威規則。請務必根據您的樣品背景進行確認。
這些指派背後的文獻
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Aromatic ring 信心 1.0
“The peak areas at 1491 and cm-' decreased rapidly, due to the [Nipissing transformation or degradation of the aromatic rings, and the cleavage of the -C-Nof the imide groups, respectively.”
Ha 等 - 2001 - Spectroscopic stuides on the liquid crystal alignm DOI: 10.1080/10587250108028259 -
Aromatic ring 信心 1.0
“The FTIR spectrum of the control dye also showed a large band at 1491 cm-1 corresponding to the aromatic stretching vibration of the C=C (Foo et al.”
Biodegradation of Methylene Blue as an Evidence of Synthetic Dyes Mineralization during Textile Effluent Biotreatment by Acinetobacter pittii DOI: 10.1007/s40710-020-00443-6 -
Acetate 信心 1.0
“In addition, two bands were observed at 1491 and 1388 that corresponds to C=O stretching and C-C stretching of alkanes respectively.”
Ecotoxicity of Musa paradisiaca leaf extract-coated ZnO nanoparticles to the freshwater microcrustacean Ceriodaphnia cornuta DOI: 10.1016/j.limno.2017.09.004 -
Aromatic ring 信心 1.0
“cm-1 [ν(N-H)], to the stretching vibration the band at 1637 cm-1 CO [ν(CO)], stretching vibration the band at 1569 to the quinonoid ring-stretching vibration, the bands at 1505 cm-1 to the benzenoid ring-stretching vibrations, the and 149”
Blaha 等 - 2019 - Role of p-Benzoquinone in the Synthesis of a Condu DOI: 10.1021/acsomega.9b00542 -
Aromatic ring 信心 1.0
“FTIR spectra 1600 (typical aromatic skeletal vibration), 1491 (disubstituted benzene ring), 1222 (antisymmetric C-O-C stretching vibration), 934 (O-C vibration 2 in the oxazine ring with a minor contribution from the phenolic ring), 753 (Ar”
Developing Further Versatility in Benzoxazine Synthesis via Hydrolytic Ring-Opening DOI: 10.3390/polym12030694 -
Aromatic ring 信心 1.0
“The crystallographic data perspectrum displayed absorption bands at 1491 and refinement 1 taining to crystal structure solution and are given corresponding to the aromatic C=C group while at 1294”
Sadia 等 - 2020 - Schiff-Based Fluorescent-ON Sensor L Synthesis and DOI: 10.1155/2020/2192584 -
Carboxyl (COOH) 信心 1.0
“The peaks at 1549 and a cm-1 small peak 1491 are due to the asymmetric and symmetric stretching modes of carboxylic acid, respectively [32].”
Thabede 等 - 2023 - Synthesis of lanthanum metal organic framework usi DOI: 10.15251/DJNB.2023.181.157 -
信心 0.8
“Significant peaks of PAni due to C=C ring stretching.”
Applications of chitosan (CHI)-reduced graphene oxide (rGO)-polyaniline (PAni) conducting composite electrode for energy generation in glucose biofuel cell DOI: 10.1038/s41598-020-67253-6
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