What absorbs at 3340 cm⁻¹ in an FTIR spectrum?
A band near 3340 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
可能的官能团归属
| 官能团 | 支持性事实 | 引用来源 | 最高置信度 |
|---|---|---|---|
| Hydroxyl (O-H) | 11 | 11 | 1.0 |
| N h | 8 | 8 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 0.9 |
| Hydrogen bond | 1 | 1 | 0.8 |
| Lignin | 1 | 1 | 0.7 |
排名反映了累积的文献证据，而非单一的权威规则。请始终对照您的样品背景进行确认。
这些分配背后的文献
-
Hydroxyl (O-H) 置信度 1.0
“Explicitly associated in text: 'peak at ~3340 cm-1 which is associated with hydroxyl groups'”
Daud 等 - 2017 - Functionalizing Graphene Oxide with Alkylamine by DOI: 10.3390/nano7060135 -
N h 置信度 1.0
“explicit assignment”
Krol 等 - 2021 - Polyurethane cationomers containing fluorinated so DOI: 10.1007/s00396-021-04819-4 -
置信度 0.95
“Explicit assignment: 'peak around 3340 (free and bound -NH urethane)'”
Rosu 等 - 2021 - Effect of Thermal Aging on the Physico-Chemical an DOI: 10.3390/polym13020192 -
置信度 0.95
“Explicit assignment: 'The peak at 3340 is attributed to O-H vibrations in adsorbed water or as hydroxyl group'”
da Silva 等 - 2022 - Effect of an enamel matrix derivative (Emdogain) o DOI: 10.1038/s41598-022-13081-9 -
置信度 0.9
“Explicit assignment: 'unbounded OH, aliphatic CH group, and C=O stretch 3340cm-1, 2924cm-1, 1625cm-1'.”
Bhatlu 等 - 2023 - Preparation of Breadfruit Leaf Biochar for the App DOI: 10.1155/2023/7369027 -
Hydroxyl (O-H) 置信度 0.9
“Intensity of peak at 3340 enhanced due to more hydroxyls”
Liu 等 - 2020 - Citrate esterification of debranched waxy maize st DOI: 10.1016/j.foodhyd.2020.105704 -
Hydroxyl (O-H) 置信度 0.9
“OH groups centered at 3340 cm-1 due to carboxyl functionalization.”
Sivaraj 和 Vijayalakshmi - 2019 - Novel synthesis of bioactive hydroxyapatitef-mult DOI: 10.1016/j.jallcom.2018.10.341 -
N h 置信度 0.9
“Explicitly labeled as N-H peak.”
Spee 等 - 2011 - Low Temperature Silicon Nitride by Hot Wire Chemic DOI: 10.1166/jnn.2011.5100
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