What absorbs at 2355 cm⁻¹ in an FTIR spectrum?
A band near 2355 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 2355 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 |
|---|---|---|---|
| Carbon dioxide | 3 | 3 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Alkyl C-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 |
|---|---|---|---|
| oil shale | 2355, 1625, 1053 | Silicon-oxygen (Si-O) | 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 2355 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
-
Alkyl C-H förtroende 1,0
“cm-1 The band at 2355 was attributed to the presence of C-H stretching vibrations, which cm-1 were indicative of the presence of methyl groups.”
Antimicrobial Activity of Chemically and Biologically Treated Chitosan Prepared from Black Soldier Fly (Hermetia illucens) Pupal Shell Waste DOI: 10.3390/microorganisms9122417 -
Carbon dioxide förtroende 1,0
“(νNH 3) and 1626, 966 (δNH 3), CO (characteristic 2 cm-1 The differences that may arise between them are probably absorption bands at 2355 and 2311 ( νCO 2) and cm-1 cm-1 due to the fact that GS curve profile is related to the molar 669 (δ”
Junior Caires 等 - 2017 - Thermoanalytical, Spectroscopic and DFT Studies of DOI: 10.1590/1980-5373-MR-2016-0633 -
Amide förtroende 1,0
“The IR spectrum of probiotics-loaded whey nanoparticles demonstrated a significant signal at 2355 cm-1 corresponding to the amide O=C=O stretch vibration.”
Effect of protein-based nanoencapsulation on viability of probiotic bacteria under hostile condition DOI: 10.1080/10942912.2023.2228514 -
Hydroxyl (O-H) förtroende 1,0
“The bands located around ~3432, ~3624, and ~3696 cm-1 were characteristic of OH group vibration elongation whereas the band ~2355 could Table 4.”
Structural Study of Nano-Clay and Its Effectiveness in Radiation Protection against X-rays DOI: 10.3390/nano12142332 -
Carbon dioxide förtroende 0,9
“Text states 'peak at the wavenumber of 2355 indicates that CO2 is a main component'.”
Xie Fang-Fang 等 - 2010 - STUDY ON THERMAL CONVERSION OF HUADIAN OIL SHALE U DOI: 10.3176/oil.2010.4.04
Har du ett spektrum med detta band?
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