What absorbs at 3201 cm⁻¹ in an FTIR spectrum?
A band near 3201 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 6 cited sources
Hurtigt svar
A band near 3201 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) | 5 | 4 | 1,0 |
| Protein | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Phenolic | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 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 |
|---|---|---|---|
| PVP | 3201, 2983, 1648 | Hydroxyl (O-H), Secondary amine | 1 |
| humic acid | 3201, 1660, 1220 | Hydroxyl (O-H) | 1 |
| collagen | 3201, 1408, 1660 | N h, Protein | 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 3201 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
“Broaden peak at 3201 correspond to the stretching vibration of cm-1 hydroxyl group (OH or H 2O).”
Rani 和 Yadav - 2015 - Study of Optical Properties of BaMn1-xCrxO3 (x=0.0 DOI: 10.1063/1.4929284 -
Hydroxyl (O-H) tillid 1,0
“1.03 The FTIR spectra of HA (Figure 1) confirmed the existence of oxygen-containing functional groups, as shown at wavenumbers of 3201 cm-1 (OH stretch of phenolic-OH), 1704 cm-1 (C=C stretch The FTIR spectra of HA (Figure 1) confirmed the”
Kinetics and Thermodynamics of Uranium (VI) Adsorption onto Humic Acid Derived from Leonardite DOI: 10.3390/ijerph16091552 -
N h tillid 1,0
“264(cid:3)C 266(cid:3)C, Light yellow solid, Yield: 67%, m.p: to Rf: 129.2 (C19), 129.1 (C18), 128.8 (C17), 122.8 (C15), 121.0 cm-1): n-hexane 0.65 [Acetone: (7:3)], FTIR (KBr disk, (C10), 111.8 (C9), 109.6 (C8), 100.6 (C3), 55.9 (C2), H]+,”
Development of an Efficient, One-Pot, Multicomponent Protocol for Synthesis of 8-Hydroxy-4-Phenyl-1,2-Dihydroquinoline Derivatives DOI: 10.1002/jhet.4193 -
Protein tillid 1,0
“FTIR Comment -22.6 R-EVA France 177.3 38.9 14.4 52.1 12.4 4.9 MAMS321±14 Collagen peaks and higher cm-1band 3201 30094 intensityofthe2900 -21.8 R-EVA Italy 5.9 1.3 7.1 8.2 2.4 4.1 MAMS5580±26 Collagen peaks and higher cm-1band 1395 24343 in”
“Here we go again”: the inspection of collagen extraction protocols for 14C dating and palaeodietary DOI: 10.1080/20548923.2021.1944479 -
Hydroxyl (O-H) tillid 1,0
“Simvastatin peak at 1740 due (TC) presented typical peaks at 3352.5 cm-1 and 3201 cm-1 corresponding to -OH and - cm-1.”
Simvastatin Loaded Dissolvable Microneedle Patches with Improved Pharmacokinetic Performance DOI: 10.3390/mi13081304 -
Hydroxyl (O-H) tillid 0,7
“broad band at 3201.01 to 3494.20 may be due to O-H stretching”
Equilibrium, kinetics and thermodynamic studies of cadmium(II) biosorption on Nannochloropsis oculata DOI: 10.1007/s13201-018-0810-y
Har du et spektrum med dette bånd?
Upload dit FTIR-spektrum og få en fuld tolkningsrapport — peak-tildelinger med litteraturhenvisninger, biblioteksmatch og en tillidsvurderet beviskæde — på få sekunder.