What absorbs at 2368 cm⁻¹ in an FTIR spectrum?
A band near 2368 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 5 cited sources
Snabbt svar
A band near 2368 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 |
|---|---|---|---|
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 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 |
|---|---|---|---|
| TiO2 | 2368, 1700, 1093 | Methacrylate, Acetate, C-O single bond | 1 |
| TiO | 2368, 1730, 1699 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| TiO2 nanoparticles | 2368, 1700, 455 | Methacrylate, C-O single bond, Acetate | 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 2368 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 peak at 1544 corresponds to the bending vibrations of N-H bond and 41 cm-1 the existence of peak at 2368 recognizes to asymmetric stretching vibrations of O-H bonds in free OH groups.”
Kaur 等 - 2019 - Expanding horizon green synthesis of TiO2 nanopar DOI: 10.1088/2053-1591/ab2ec5 -
C c single bond förtroende 1,0
“peak at 2368 indicates the presence of C (cid:7) Figure 5 shows the XRD spectrum corresponding to the N or C C stretching vibration.”
Green synthesis of bimetallic Pt@Cu nanostructures for catalytic oxidative desulfurization of model oil DOI: 10.1007/s40097-017-0223-8 -
förtroende 1,0
“2368.44cm-1 2323.25cm-1 that appeared at and indicate the made a significant alteration due to aggregation of GV presence of nitrogen linkage, which is present in the molecules on the surface of sorbent, which might reduce the structure of”
Akram 等 - 2021 - Kinetic and Isothermal Investigations of Cost-Effe DOI: 10.1155/2021/5549536 -
Acetate förtroende 1,0
“oC, cm-1, spectrum of the sample sintered at 950 a small peak was observed at ~2368 which is commonly assigned to the vibration band of C-O [36], probably originated from atmospheric CO 2 adsorbed by the sample during its preparation.”
Sembiring 等 - 2014 - Synthesis and characterisation of gel-derived mull DOI: 10.1016/j.ceramint.2013.12.038 -
förtroende 0,9
“Explicit assignment: 'peak at 2368 as the amine group (N-H) of the protein'”
Khoironi 等 - 2023 - Impact of disposable mask microplastics pollution DOI: 10.1007/s11356-023-27651-5
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