What absorbs at 3167 cm⁻¹ in an FTIR spectrum?
A band near 3167 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
Ātra atbilde
A band near 3167 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.
Iespējamie funkcionālo grupu piešķīrumi
| Funkcionālā grupa | Atbalstošie fakti | Citētie avoti | Augstākā pārliecība |
|---|---|---|---|
| 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 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Amine primary | 1 | 1 | 1,0 |
| Ammonium | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
Rangs atspoguļo uzkrātos literatūras pierādījumus, nevis vienu autoritatīvu noteikumu. Vienmēr apstipriniet atbilstoši parauga kontekstam.
Spektra loģika
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 3167 cm⁻¹ is usually not enough for material identification by itself.
Reālās pasaules izmantošana
Šāda veida vaicājums ir izplatīts polimēru identificēšanā, nezināmas plastmasas skrīningā, kvalitātes kontroles problēmu risināšanā, pārstrādāto materiālu pārbaudē un ar literatūru pamatotā pīķu piešķīruma pārskatā.
Biežākās kļūdas
- Vienas izolētas joslas uzskatīšana par materiāla pierādījumu, nepārbaudot vismaz vienu vai divus atbalsta pīķus.
- Ignorējot pārklāšanos: vairākas funkcionālās grupas var dot ieguldījumu tuvu tam pašam viļņa skaitlim.
- Izlaist validāciju, ja piedevas, maisījumi, oksidācija vai piesārņojums var izkropļot spektru.
Verifikācijas padoms
Ja joprojām pastāv neskaidrība, apstipriniet hipotēzi ar DSC, GC-MS vai TGA, īpaši maisījumiem, noārdītiem paraugiem un pildītiem polimēriem.
Literatūra aiz šiem piešķīrumiem
-
Water (H2O) pārliecība 1,0
“3 tion of water molecules in the deliquescence process of (cid:3)3400, (cid:3)3272, (cid:3)3167 cm-1 ticles, while the peaks at and particles, including the water monomers adsorbed on NaNO are due to aggregated water molecules absorbed on t”
Lu 等 - 2008 - Molecular events in deliquescence and efflorescenc DOI: 10.1063/1.2973623(cid:5) -
Hydroxyl (O-H) pārliecība 1,0
“3539.8 Weakly H bonded OH vibrations 3487.1 Weakly H bonded OH vibrations 3166.7 Weakly H bonded OH vibrations 1648.3 H-O-H Symmetric bending vibrations 1214.2 PO4 P=O associated stretching vibrations bond, P=O stretching vibrations 1136.7”
Growth and characterization of calcium hydrogen phosphate dihydrate crystals from single diffusion gel technique DOI: 10.1002/crat.200900700 -
Alkyl C-H pārliecība 1,0
“Characteristic IR absorption peaks of pure CTZ of the cm-1), cm-1), aromatic C=C stretch (1589 C=N stretch (1570 matic C-H stretch (3167 cm-1) cm-1) and aromatic C-H bending (761 were present in the spectrum of the CTZ”
Gupta 等 - 2013 - Bioadhesive vaginal tablets containing spray dried DOI: 10.2478/acph-2013-0027 -
pārliecība 1,0
“The bands at 3382, 3358, 3217, 3167 cm-1 are due to N-H stretching of coordinated ammonia.”
Mixed Oxides Derived from Hydrotalcites Mg/Al Activein the Catalytic Transfer Hydrogenation of Furfuralto Furfuryl Alcohol DOI: 10.3390/catal13010045 -
pārliecība 1,0
“new vibrational resonances owing to the formamidinium (FA) cm-1 cm-1 (N-H stretch), 3357 (N-H stretch), cation at 3406 cm-1 cm-1 cm-1 (N-H stretch), 3167 (N-H stretch), and 1714 3271”
Szostak 等 - 2019 - Nanoscale mapping of chemical composition in organ DOI: 10.1126/sciadv.aaw6619 -
Amine primary pārliecība 1,0
“cm(cid:2)1): Lightyellowsolid,Yield:95%,m.p:235-237(cid:4)C,Rf:0.69(Acetone:n3478.58, 3432.99, 3385.93, hexane (7:3)), FTIR (KBr disc, cm(cid:2)1): (C(cid:3)N), (NH2, NH stretch), 3248.52 (Ar CH), 2189.38 1643.38 3339.23 3427.77, 3351.30 (N”
7-Hydroxy-4-phenyl-1, 2-dihydroquinoline derivatives: synthesis via one-pot, three-component reaction and structure elucidation DOI: 10.1016/j.heliyon.2020.e05035
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