What absorbs at 3732 cm⁻¹ in an FTIR spectrum?
A band near 3732 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 7 cited sources
Snabbt svar
A band near 3732 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) | 5 | 5 | 1,0 |
| N h | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Silanol (Si-OH) | 1 | 1 | 0,9 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Möjliga material
| Material | Stödjande toppar | Överlappande grupper | Citerade källor |
|---|---|---|---|
| polyurethane | 3732, 2270, 1700 | Methacrylate, Methoxy (OCH3), N 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 3732 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
“increasing up to = 0.6, where there is a sharp discontinuity in and The infrared OH-stretching spectrum of the F F cm-1 MgMgMg-OH→ OH end-member shows a main band at 3732 which is assigned to the local Rb arrangement, and a cm-1 □ MgMgMg-OH”
Synthesis and solid solution in “rubidium richterite”, Rb(NaCa)Mg5Si8O22(OH,F)2 DOI: 10.1007/s00269-019-01037-x -
Hydroxyl (O-H) förtroende 1,0
“The peak observed at 3732 was assigned to the O-H bond in PEO.”
New Insight on Photoisomerization Kinetics of Photo-Switchable Thin Films Based on Azobenzene/Graphene Hybrid Additives in Polyethylene Oxide DOI: 10.3390/polym12122954 -
Hydroxyl (O-H) förtroende 1,0
“as a very broad band from 2543 to blank-polymer particle, specific peaks of cromolyn appeared In the range of 3737cm-1, 1604cm-1 C�O, at 3732 to a weak band for the monomeric O-H due to and a band at approximately”
Alkurdi 等 - 2022 - Development and Evaluation of a Novel Polymer Drug DOI: 10.1155/2022/7903310 -
Hydroxyl (O-H) förtroende 1,0
“cm-1, cm-1 cm-1 3325 3330 3732 peaks at and corresponds - The FTIR spectroscopy confirms the presence of noncm-1 O-H 3732 to stretching bands [36,37] and the peak at polar groups on the surface that enhance hydrophobicO-H are assigned to st”
Dergham 等 - 2022 - Hydrophobization of paper intended for packaging DOI: 10.31349/RevMexFis.68.031006 -
förtroende 1,0
“The peaks at 3733 and cm(cid:3)1 Creative N-H N-H FTIR spectra of the PU peaks showed stretching vibration 3732 are related to the stretching vibration in the 2016.”
Polyurethane/58S bioglass nanofibers: synthesis, characterization, and in vitro evaluation DOI: 10.1039/c5ra24786a -
Acetate förtroende 1,0
“The new characteristic peaks at 3732 cm-1, 3672 cm-1 and 3648 cm-1 cm-1 and C-O [35,36], and the characteristic peaks at 665 are caused by the bending of of bastnaesite treated with NHA are caused by the tensile vibration of N-H and C-O nap”
Selective Adsorption of 2-Hydroxy-3-Naphthalene Hydroxamic Acid on the Surface of Bastnaesite and Calcite DOI: 10.3390/min12111341 -
Hydroxyl (O-H) förtroende 0,9
“Isolated Si-OH band.”
Negri 等 - 2018 - Investigating the Low Temperature Formation of Cu- DOI: 10.1002/chem.201802769
Har du ett spektrum med detta band?
Ladda upp ditt FTIR-spektrum och få en fullständig tolkningsrapport – toppidentifieringar med litteraturhänvisningar, biblioteksmatchningar och en förtroendebedömd beviskedja – på sekunder.