What absorbs at 3000 cm⁻¹ in an FTIR spectrum?
A band near 3000 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
Возможные назначения функциональных групп
| Функциональная группа | Подтверждающие факты | Цитируемые источники | Максимальная достоверность |
|---|---|---|---|
| Hydroxyl (O-H) | 47 | 42 | 1,0 |
| Alkyl C-H | 43 | 41 | 1,0 |
| N h | 8 | 7 | 0,9 |
| Aromatic ring | 6 | 6 | 1,0 |
| Methyl | 4 | 3 | 1,0 |
| Lipid | 3 | 2 | 0,9 |
| Carboxyl (COOH) | 2 | 2 | 1,0 |
| Alkene (C=C) | 2 | 2 | 0,9 |
| Ester | 2 | 2 | 0,8 |
| Hydrogen bond | 2 | 2 | 0,7 |
| C-O single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 0,8 |
| Phosphate (PO4) | 1 | 1 | 0,8 |
| Ketone | 1 | 1 | 0,6 |
| Carbonyl (C=O) | 1 | 1 | 0,6 |
| Styrene | 1 | 0 | 0,8 |
| Protein | 1 | 0 | 0,7 |
Ранжирование отражает накопленные литературные данные, а не единственное авторитетное правило. Всегда проверяйте в контексте вашего образца.
Литература, лежащая в основе этих назначений
-
Aromatic ring достоверность 1,0
“3000cm-1 the region In the present case, the very strong rise to three bands above for aromatic C H and 1164cm-1 modes observed at 1289 and in IR corresponds to H stretching observed in the region between one aliphatic C 2900cm-1.”
Arjunan 等 - 2007 - Fourier transform infrared and Raman spectral assi DOI: 10.1016/j.saa.2006.09.044 -
Carboxyl (COOH) достоверность 1,0
“While in cobalt stearate, the absorption peak at wave number of 1554 cm-1indicate the presence of asymmetric vibrations of carboxylate groups absorption peak at the wave numbers of 3000”
Asriza 和 Arcana - 2015 - SYNTHESIS OF COBALT STEARATE AS OXIDANT ADDITIVE F DOI: 10.1063/1.4930711 -
Hydroxyl (O-H) достоверность 1,0
“9) showed that the peaks were cm-1 of C-H stretching, free O-H stretching, O-H 3000”
Aziz 等 - 2020 - FTIR and HPLC-Based Metabolomics of Yacon Leaves E DOI: 10.22146/ijc.43453 -
C-O single bond достоверность 1,0
“Text: 'Peak around 3000 was due to the C-- -OH' (C-OH).”
Mathew 等 - 2021 - Green synthesis of anatase titanium dioxide nanopa DOI: 10.1016/j.inoche.2021.108485 -
Alkyl C-H достоверность 1,0
“Explicitly attributed to stretch CH group.”
Negim 等 - 2021 - Synthesis and characterization of polypropylene gl DOI: 10.31643/2021/6445.23 -
Hydroxyl (O-H) достоверность 1,0
“Text: 'absorption peak at around 3000 was associated with the stretching vibration of the -OH group'”
Lai 等 - 2020 - A novel and robust heterogeneous Cu catalyst using DOI: 10.3762/bjoc.16.238 -
достоверность 1,0
“Part of region.”
Liu 等 - 2021 - Fourier transform infrared spectroscopy coupled wi DOI: 10.1038/s41598-021-91802-2 -
Alkyl C-H достоверность 1,0
“Stretching vibration at 3000 cm-1 identified as C-H corresponding to benzene ring.”
Umar 等 - 2021 - Untargeted Metabolomics Analysis Using FTIR and UH DOI: 10.3390/metabo11010042
Есть спектр с этой полосой?
Загрузите свой FTIR-спектр и получите полный отчет об интерпретации — назначение пиков с цитированием литературы, совпадения с библиотекой и цепочку доказательств с оценкой достоверности — за секунды.
Интерпретировать мой спектр