What absorbs at 3673 cm⁻¹ in an FTIR spectrum?
A band near 3673 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 3673 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) | 4 | 3 | 1,0 |
| Silanol (Si-OH) | 1 | 1 | 1,0 |
| Phosphate (PO4) | 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 | 3673, 1100, 1080 | Hydroxyl (O-H), Silanol (Si-OH) | 1 |
| biochar | 3673, 1640, 1115 | 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 3673 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
-
Phosphate (PO4) förtroende 1,0
“cm-1may this surface Ti OH and P OH groups with a band at 3673 the photocatalytic behavior of TiHap strongly relates to attributed to the photocatalytic activity as well as the surface Since also OH• the P particle surface nature, the surfa”
FTIR studies on photocatalytic activity of Ti(IV)-doped calcium hydroxyapatite particles DOI: 10.1016/j.molcata.2012.04.009 -
Silanol (Si-OH) förtroende 1,0
“Pt/silicad 3697/3676 O-H stretch of isolated silanol 3673 3740 silicaf 3515 3535/3509 O-H stretch of silanol H-bonded to 3510”
Leewis 等 - 2006 - Ammonia adsorption and decomposition on silica sup DOI: 10.1016/j.apsusc.2005.12.115 -
förtroende 1,0
“The 3673 peak in FTIR data corresponds to Mg, Mg).”
Bao 等 - 2018 - A method of determining heated ancient nephrite ja DOI: 10.1038/s41598-018-30564-w -
Hydroxyl (O-H) förtroende 1,0
“The FTIR spectrum of the studied tremolite in the OH-stretching region (Figure 5) shows three cm-1, Mg/Fe2+ well-resolved peaks at 3673, 3656, and 3643 which could be assigned to the different M(1,3) configurations at [26,64].”
Della Ventura 等 - 2018 - Infra Red Spectroscopy of the Regulated Asbestos A DOI: 10.3390/min8090413 -
förtroende 1,0
“An obvious 225 cm-1 band for talc at 3673 is most likely due to OHstretching (Petit et al., 2004) and Si-O stretching 226 cm-1 at 942 (Ossman et al., 2014).”
Galvin-King 等 - 2021 - Garlic adulteration detection using NIR and FTIR s DOI: 10.1016/j.jfca.2020.103757 -
Hydroxyl (O-H) förtroende 0,9
“Explicit assignment: adsorption peaks of -OH.”
Lu 等 - 2020 - Adsorption of Rhodamine B from Aqueous Solution by DOI: 10.15244/pjoes/112207
Har du ett spektrum med detta band?
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