What absorbs at 3160 cm⁻¹ in an FTIR spectrum?
A band near 3160 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
Snabbt svar
A band near 3160 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.
Möjliga identifieringar av funktionella grupper
| Funktionell grupp | Stödjande fakta | Citerade källor | Högsta förtroende |
|---|---|---|---|
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| N h | 2 | 2 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Möjliga material
| Material | Stödjande toppar | Överlappande grupper | Citerade källor |
|---|---|---|---|
| starch | 3160, 1650, 1540 | Hydroxyl (O-H) | 1 |
| ZIF-8 | 3160, 1747, 1145 | N h, Secondary amine | 1 |
| polymer | 3160, 1718, 1722 | Hydroxyl (O-H) | 1 |
Material visas endast när samma litteraturpool stöder detta band och minst en ytterligare karakteristisk topp.
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 3160 cm⁻¹ is usually not enough for material identification by itself.
Användning i verkligheten
Denna typ av fråga är vanlig inom polymeridentifiering, screening av okänd plast, felsökning av kvalitetskontroll, verifiering av återvunnet material och litteraturstödd toppidentifieringsgranskning.
Vanliga misstag
- Behandla ett isolerat band som bevis på ett material utan att kontrollera minst en eller två stödjande toppar.
- Ignorerar överlapp: flera funktionella grupper kan bidra nära samma vågtal.
- Hoppa över validering när tillsatser, blandningar, oxidation eller föroreningar kan förvränga spektrat.
Verifieringsråd
När oklarhet kvarstår, validera hypotesen med DSC, GC-MS eller TGA, särskilt för blandningar, nedbrutna prover och fyllda polymerer.
Litteratur bakom dessa identifieringar
-
Hydroxyl (O-H) förtroende 1,0
“The peaks at 3463 cm-1 o-phenylenediamine sis of CQDs prepared from showed the and 3160 belong to O-H stretching vibrations whereas a sp2 cm-1 presence of domains predominantly in the carbon core peak at 1612 stems from C=C stretching vibra”
Structural, optical, and bioimaging characterization of carbon quantum dots solvothermally synthesized from o-phenylenediamine DOI: 10.3762/bjnano.14.17 -
förtroende 1,0
“As seen in cm-1, high frequency region, where only a band at around 3160 attributed to N-H stretch, 4a, sample jn-01 shows the vibrational band characteristics of ZIF-8 (ZIF-L) that have been is clearly present for ZIF-L (see Figure 5 and F”
XRD and Spectroscopic Investigations of ZIF—Microchannel Glass Plates Composites DOI: 10.3390/ma16062410 -
N h förtroende 1,0
“The IR spectrum of celecoxib (Figure 2) shows medium cm-1, absorption bands at 3160 and 3260 which were assigned to the drug -NH symmetric and asymmetric intensity and a shift to higher wave numbers.”
Pandya 等 - 2009 - Formulation, Characterization, and Optimization of DOI: 10.14227/DT160409P22 -
Hydroxyl (O-H) förtroende 1,0
“Wide double-peak line in the band cm-1 3160) corresponds to fluctuations of hydroxyl Electrical Conductivity of the Polymer Composites with group.”
Influence of Ultraviolet/Ozonolysis Treatment of Nanocarbon Filler on the Electrical Resistivity of Epoxy Composites DOI: 10.1186/s11671-016-1577-4 -
Hydroxyl (O-H) förtroende 1,0
“der at 3220 with its absorption maximum at 3160 The O-D band covering the”
Intermolecular Interactions and Spectroscopic Signatures of the Hydrogen-Bonded System—n-Octanol in Experimental and Theoretical Studies DOI: 10.3390/molecules27041225 -
Water (H2O) förtroende 1,0
“Hydrogen-bonded water to the gluten network the result of cm-1, 455 hydration by water also form peaks around 3160 contributing to the wide band seen in all 456 samples.”
Turksoy 等 - 2020 - Effect of aging at different temperatures on LAOS DOI: 10.1016/j.foodhyd.2018.12.055
Har du ett spektrum med detta band?
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