What absorbs at 3349 cm⁻¹ in an FTIR spectrum?
A band near 3349 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 |
|---|---|---|---|
| Hydroxyl (O-H) | 6 | 6 | 1.0 |
| N h | 3 | 3 | 1.0 |
| Secondary amine | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Protein | 1 | 1 | 1.0 |
| Hydrogen bond | 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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Hydrogen bond 信心 1.0
“The strong peak at 3349 attributed to the intra-molecular hydrogen bonds for (3)O-H-O(5), as shown in Fig.”
Manuscript Preparation Instruction for Publishing in Computer Modeling in Engineering and Science (CMES) DOI: 10.3970/cmc.2018.03608 -
Hydroxyl (O-H) 信心 1.0
“After modification, a strong and wide band of O-H that overlapped with N-H band (3349 cm-1) cm-1.”
Synthesis and characterizations of o-nitrochitosan based biopolymer electrolyte for electrochemical devices DOI: 10.1371/journal.pone.0212066 -
Secondary amine 信心 1.0
“In peak at 1746 cm-1 cm-1 M4T2,the broad PVP peak FTIR spectrum at 3349 represents the stretching vibration M4T2,the broad PVP peak FTIR spectrum at 3349 cm-1 represents the stretching vibracm-1 of the secondary amine N-H group present in P”
TiO2 Nanoparticle Filler-Based Mixed-Matrix PES/CA Nanofiltration Membranes for Enhanced Desalination DOI: 10.3390/membranes11060433 -
N h 信心 1.0
“cm-1 vibration of the sulphonamide (3395 in pure furosemide, 3397 in physical mixtures), NH stretchingvibrationofthesecondaryaminegroup(3348cm-1 3349cm-1 inpurefurosemide, inphysical”
Kovacs 等 - 2020 - Influence of Aqueous Solubility-Enhancing Excipien DOI: 10.3390/pharmaceutics12040385 -
信心 1.0
“3357 and Cd (3353 A decrease in the peak wavenumbers occurred in the spectra for Cu for Cu assigned at a band of 3349 cm-1, Pb (3330 cm-1) and Zn (3341 cm-1).”
Sensitivity and Calibration of the FT-IR Spectroscopy on Concentration of Heavy Metal Ions in River and Borehole Water Sources DOI: 10.3390/app10217785 -
Protein 信心 1.0
“The bands between 3349 and 3374 represents the secondary structure of the protein skeleton, which is often used for the quan-”
Tomczynska-Mleko 等 - 2023 - Co-Gelation of Pumpkin-Seed Protein with Egg-White DOI: 10.3390/foods12102030 -
Hydroxyl (O-H) 信心 1.0
“LLM confirmed rule peak-group candidate”
Reduced graphene Oxide/NiO based nano-composites for the efficient removal of alizarin dye, indigo dye and reduction of nitro aromatic compounds DOI: 10.1016/j.heliyon.2023.e17162 -
Hydroxyl (O-H) 信心 0.9
“Broadest absorption peak around 3349 mainly assigned to O-H stretching.”
Geng 等 - 2020 - Quality Attributes and Microstructure of Cell Wall DOI: 10.3136/fstr.26.281
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