What absorbs at 2320 cm⁻¹ in an FTIR spectrum?
A band near 2320 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 2320 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 |
|---|---|---|---|
| Hydrogen bond | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Water (H2O) | 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 |
|---|---|---|---|
| Silica | 2320, 1100, 1080 | Hydroxyl (O-H) | 1 |
| chitosan | 2320, 1650, 1655 | 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 2320 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
-
Water (H2O) förtroende 1,0
“The very weak peak at 2320 corresponded to the symmetric chemisorbed water.”
Synthesis of CuO/ZnO Nanocomposites and Their Application in Photodegradation of Toxic Textile Dye DOI: 10.3390/jcs3030091 -
C c single bond förtroende 1,0
“The C45-C46 1.6548 N12-C14 1.4551 C7-C15 1.5556 cm-1 peak at 1097 represents the C-N stretching vibration for the C46-O47 1.5737 C14-C15 1.6129 C31-C32 1.6139 tertiary nitrogen atom formed from the reaction of the lysine with O47-C48 1.5008”
Delgadillo-Armendariz 等 - 2014 - INTERACTIONS OF CHITOSANGENIPIN HYDROGELS DURING DOI: 10.5935/0100-4042.20140243 -
Hydroxyl (O-H) förtroende 1,0
“The bands between 2320 and 3000 are typical for OH stretching”
Phase Composition of Silica Fume—Portland Cement Systems Formed under Hydrothermal Curing Evaluated by FTIR, XRD, and TGA DOI: 10.3390/ma14112786 -
förtroende 1,0
“2320 cm-1 is due to probe molecules adsorbed on extra framework cm-1 aluminium sites, whilst the intense asymmetric band at ca.”
In Situ FT-IR Characterization of CuZnZr/Ferrierite Hybrid Catalysts for One-Pot CO2-to-DME Conversion DOI: 10.3390/ma11112275 -
Hydrogen bond förtroende 1,0
“The shown in Figure 5c exhibits a new peak at cm-1, 2320 corresponding to P-H bonds, consistent with the formation of phosphine gas (PH 3) during”
Development of Biodegradable Flame-Retardant Bamboo Charcoal Composites, Part II: Thermal Degradation, Gas Phase, and Elemental Analyses DOI: 10.3390/polym12102238
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