What absorbs at 3200 cm⁻¹ in an FTIR spectrum?
A band near 3200 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) | 40 | 30 | 0.95 |
| N h | 8 | 8 | 1.0 |
| Alkyl C-H | 3 | 3 | 0.9 |
| Carboxyl (COOH) | 3 | 0 | 0.8 |
| Water (H2O) | 2 | 1 | 0.9 |
| Hydrogen bond | 2 | 1 | 0.8 |
| Protein random coil | 1 | 1 | 0.9 |
| Amide | 1 | 1 | 0.8 |
| Alkene (C=C) | 1 | 1 | 0.8 |
| Oxygen heterocycle | 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
-
置信度 1.0
“Explicit: 'a negative band centered at 3200 cm-1 ... referred as solvent-shared ion-pair'.”
Ashraf 等 - 2021 - Identification and properties of ion-pairs in the DOI: 10.1016/j.molliq.2020.114891 -
置信度 1.0
“Explicitly assigned to hydrogen-related bonds.”
Miyazaki 等 - 2005 - Properties of radio-frequency-sputter-deposited Ga DOI: 10.1063/1.1888027g -
N h 置信度 1.0
“Explicit assignment in text.”
Al-Shdefat 等 - 2023 - Ribociclib Hybrid Lipid-Polymer Nanoparticle Prepa DOI: 10.3390/polym15132844 -
Hydroxyl (O-H) 置信度 0.95
“Assigned to OH stretching vibration of hydroxyl groups.”
Czajka 等 - 2022 - Grafted Lactic Acid Oligomers on Lignocellulosic F DOI: 10.3390/ma15010314 -
Hydroxyl (O-H) 置信度 0.9
“Broad band at around 3200 cm-1 assigned to -OH vibration.”
Gan 等 - 2019 - Hydration of mixed halide perovskites investigated DOI: 10.1063/1.5087914 -
置信度 0.9
“Peak at 3200 cm-1 associated with water (eOH group) stretching vibration.”
Gonzalez-Munoz 等 - 2016 - Rapid prediction of moisture content of quinoa (Ch DOI: 10.1016/j.jcs.2016.09.006 -
Hydroxyl (O-H) 置信度 0.9
“Attributed to O-H stretching.”
Kumar 和 Ahuja - 2020 - Preparation and characterization of aliphatic poly DOI: 10.1007/s00289-019-03067-5 -
Protein random coil 置信度 0.9
“Explicit assignment: 'band at 3200 ... relates to ν the peptide mode in the random coil structure'.”
Rozenberg 和 Shoham - 2007 - FTIR spectra of solid poly-L-lysine in the stretch DOI: 10.1016/j.bpc.2006.07.008
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