What absorbs at 2940 cm⁻¹ in an FTIR spectrum?
A band near 2940 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 |
|---|---|---|---|
| Alkyl C-H | 10 | 9 | 1.0 |
| Protein | 1 | 1 | 0.9 |
| Carboxyl (COOH) | 1 | 1 | 0.8 |
| Methyl | 1 | 0 | 0.8 |
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
-
Alkyl C-H 信心 0.95
“Explicit assignment: 'band at 2940.3 cm-1 was indicative of C-H stretching'”
Bhateja 等 - 2020 - Amelioration of Diabetes mellitus by modulation of DOI: 10.1016/j.jaim.2019.06.003 -
Alkyl C-H 信心 0.95
“Explicit assignment in text.”
Lando 等 - 2017 - UV-Surface Treatment of Fungal Resistant Polyether DOI: 10.3390/ijms18071536 -
Alkyl C-H 信心 0.9
“C-H vibration peaks at about 2940 cm-1.”
Biswas 等 - 2020 - Hydrophobic Modification of Cashew Gum with Alkeny DOI: 10.3390/polym12030514 -
Alkyl C-H 信心 0.9
“C-H stretching band at around 2940 cm-1.”
Ellis 和 Martin - 2016 - Opportunities and challenges for polymer science u DOI: 10.1016/j.eurpolymj.2016.02.013 -
Protein 信心 0.9
“Text: 'band at approximately 2940 This predominantly protein band'”
Greve 等 - 2008 - ATR-FTIR, FT-NIR and near-FT-Raman spectroscopic s DOI: 10.3233/SPE-2008-0365 -
Alkyl C-H 信心 0.9
“Explicit assignment: 'two CH asymmetric' at ~2940 cm-1.”
Michalak 等 - 2008 - Investigation of the chemical purity of silicon su DOI: 10.1021/jp8030539 -
Alkyl C-H 信心 0.9
“Explicitly assigned in text: '2940 (νCH2)'”
Nowacka 等 - 2015 - Alkali-Metal-Directed Hydrolytic Condensation of 3 DOI: 10.1007/s12633-014-9249-4 -
Carboxyl (COOH) 信心 0.8
“bands characteristic to carboxylate dianion (malonate)”
Dippong 等 - 2017 - THE EFFECT OF POSITIONAL ISOMERISM OF PROPANEDIOL DOI: 10.24193/subbchem.2017.4.02
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