What absorbs at 3398 cm⁻¹ in an FTIR spectrum?
A band near 3398 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
Hurtigt svar
A band near 3398 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| Hydroxyl (O-H) | 4 | 4 | 1,0 |
| N h | 2 | 2 | 1,0 |
| Amino acid | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Protein | 1 | 1 | 0,9 |
| Water (H2O) | 1 | 0 | 1,0 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| SiO2 | 3398, 1739, 699 | Hydroxyl (O-H), Metal oxygen | 1 |
| graphene oxide | 3398, 1150, 3400 | Hydroxyl (O-H) | 1 |
| GO | 3398, 1720, 1182 | Hydroxyl (O-H) | 1 |
Materialer vises kun, når den samme litteraturpulje understøtter dette bånd og mindst en yderligere karakteristisk top.
Spektrumlogik
This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 3398 cm⁻¹ is usually not enough for material identification by itself.
Anvendelse i virkeligheden
Denne type forespørgsel er almindelig ved polymeridentifikation, screening af ukendt plast, fejlfinding i kvalitetskontrol, verifikation af genanvendt materiale og litteraturunderstøttet gennemgang af peak-tildeling.
Almindelige fejl
- Behandling af et isoleret bånd som bevis på et materiale uden at kontrollere mindst en eller to understøttende toppe.
- Ignorerer overlap: flere funktionelle grupper kan bidrage nær samme bølgetal.
- Spring validering over, når additiver, blandinger, oxidation eller forurening kan forvrænge spektret.
Verifikationsrådgivning
Når tvetydighed fortsat består, valider hypotesen med DSC, GC-MS eller TGA, især for blandinger, nedbrudte prøver og fyldte polymerer.
Litteratur bag disse tildelinger
-
Hydroxyl (O-H) tillid 1,0
“cm-1 Pure TA spectra displayed an infrared absorption band at 3398 related to the cm-1 hydrogen-bonded hydroxyl stretching vibration, at 1706 associated with stretching vibration of the carbonyl group (in the aliphatic ester bonds).”
Chitosan-Coated PLGA Nanoparticles Encapsulating Triamcinolone Acetonide as a Potential Candidate for Sustained Ocular Drug Delivery DOI: 10.3390/pharmaceutics13101590 -
N h tillid 1,0
“LLM confirmed rule peak-group candidate”
Bouldin 等 - 2014 - Biocatalytic Synthesis of Fluorescent Conjugated I DOI: 10.3390/bioengineering1040246 -
Hydroxyl (O-H) tillid 1,0
“LLM confirmed rule peak-group candidate”
Han 等 - 2023 - Fourier Transform Infrared Spectrometry Detection DOI: 10.1021/acsomega.2c05933 -
Silicon-oxygen (Si-O) tillid 1,0
“cm-1 The spectrum of SiO 2/GO (Figure 6c) showed an abroad peak at 3398 that The spectrum of SiO2/GO (Figure 6c) showed an abroad peak at 3398 cm-1 that becm-1 belonged to -OH groups of SiO and GO.”
Sustainable Remedy Waste to Generate SiO2 Functionalized on Graphene Oxide for Removal of U(VI) Ions DOI: 10.3390/su14052699 -
Metal oxygen tillid 1,0
“Viswanatha, Open FTIR spectroscopy, showing the broadening of the highUnderstanding the role of surface capping ligands in cm(cid:1)1 O-Zn-O]COH intensity peak at 3398 for coordination passivating the quantum dots using copper dopants as ef”
l-Alanine capping of ZnO nanorods: increased carrier concentration in ZnO/CuI heterojunction diode DOI: 10.1039/c7ra12385j -
tillid 1,0
“Aloe vera showed an adsorp- -1, tion band of about 3398 cm which may be characteristic of amino acids due to the presence of hydrogen-bonded N cm-1 - H.”
Naseriyeh 等 - 2022 - Preparation of liposomal hydrogel containing Calen DOI: 10.14715/cmb/2022.68.11.1 -
Hydroxyl (O-H) tillid 1,0
“At high frequencies, the FTIR spectrum frequencies, the FTIR spectrum shows also a band at 3398 that corresponds to O-H bridging of Ramis and coworkers [37] and Wen and coworkers [38].”
Preparation, Characterization and Catalytic Activity of Nickel Molybdate (NiMoO4) Nanoparticles DOI: 10.3390/molecules23020273 -
Protein tillid 0,9
“Explicit assignment in text.”
Developmental stages of biofilm and characterization of extracellular matrix of manglicolous fungus Aspergillus niger BSC‐1 DOI: 10.1002/jobm.201900550
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