What absorbs at 1443 cm⁻¹ in an FTIR spectrum?
A band near 1443 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 8 cited sources
Hurtigt svar
A band near 1443 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.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| Alkyl C-H | 5 | 5 | 1,0 |
| Methoxy (OCH3) | 4 | 4 | 1,0 |
| Methacrylate | 4 | 4 | 1,0 |
| Acetate | 4 | 4 | 1,0 |
| C-O single bond | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Aromatic ring | 3 | 3 | 1,0 |
| Alkene (C=C) | 3 | 3 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| Ring structure | 2 | 1 | 1,0 |
| Nitrogen heterocycle | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Silicon carbon | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| C#c | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Lewis acid site | 1 | 0 | 1,0 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| PVA | 1443, 1660, 2930 | Alkyl C-H, Acetate, Methacrylate | 1 |
| biochar | 1443, 1640, 1115 | Alkyl C-H, Methacrylate, Acetate | 1 |
Materialer vises kun, når den samme litteraturpulje understøtter dette bånd og mindst en yderligere karakteristisk top.
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 1443 cm⁻¹ is usually not enough for material identification by itself.
Anvendelse i virkeligheden
Denne type forespørgsel er almindelig ved polymeridentifikation, screening af ukendt plast, fejlfinding i kvalitetskontrol, verifikation af genanvendt materiale og litteraturunderstøttet gennemgang af peak-tildeling.
Almindelige fejl
- Behandling af et isoleret bånd som bevis på et materiale uden at kontrollere mindst en eller to understøttende toppe.
- Ignorerer overlap: flere funktionelle grupper kan bidrage nær samme bølgetal.
- Spring validering over, når additiver, blandinger, oxidation eller forurening kan forvrænge spektret.
Verifikationsrådgivning
Når tvetydighed fortsat består, valider hypotesen med DSC, GC-MS eller TGA, især for blandinger, nedbrudte prøver og fyldte polymerer.
Litteratur bag disse tildelinger
-
Carbonate tillid 1,0
“Besides already exchanged with the nitrate ions that initially cm-1 that, a peak of 1443 refers to the carbonate stretching occupied the interlayer host.”
Bohari 等 - 2022 - Synthesis and Characterization of 2,4-Dichlorophen DOI: 10.22146/ijc.73546 -
C#c tillid 1,0
“LLM confirmed rule peak-group candidate”
Characterization of short-length multi-walled carbon nanotubes and cytotoxicity on MDA-MB-231 and HUVEC cell lines DOI: 10.1007/s42823-019-00081-5 -
Hydroxyl (O-H) tillid 1,0
“The characteristic bands in cm-1 cm-1 the spectrum at 3213.31 (-OH stretching) and 1443.35 (-CH 2stretching) were observed cm-1 with higher intensity.”
Sprayed in-situ synthesis of Polyvinyl alcohol/Chitosan loaded Silver nanocomposite hydrogel for improved antibacterial effects DOI: 10.1016/j.ijbiomac.2019.09.186 -
Hydroxyl (O-H) tillid 1,0
“Fig6 shows a brand value of nearly 1052 cm-1 indicates stretching vibration of the C-O group and 1443.2 indicates the presence O-H group.”
Manimegalai 等 - 2022 - Experimental investigation on ferrofluid propertie DOI: 10.15251/DJNB.2022.172.661 -
Alkyl C-H tillid 1,0
“The aliphatic deformation/bending peak characterized cm-1 at 1443 showed absorption similar to that of the aromatic C=C band.”
Mathews 和 Singh - 2016 - Characterization of solid bitumen from Panandhro l DOI: 10.18520/cs/v111/i11/1842-1846 -
Alkyl C-H tillid 1,0
“-CH2groups were confirmed theO-Hstretchingfrequencyofsilanolgroupsbondedtothe peaks and methylene bridges bythestrongabsorptionsat662and630cm-1 and1443cm-1 inorganicstructure,andtheintensebandrelatedtotheSi-O- ,”
Alahmadi 等 - 2013 - Preparation of Organic-Inorganic Hybrid Materials DOI: 10.1155/2013/634863 -
Alkyl C-H tillid 1,0
“The bands between 1443 and 1382 Characterization of carboxylated PETco textiles cm-1 correspond to = C-H bonds in the aromatic ring of the cm-1 linker.”
Alejandro Torres-Cortes 等 - 2022 - Ex situ synthesis of MOF@PETcotton textile fibers DOI: 10.1007/s10965-022-03216-x -
Alkyl C-H tillid 1,0
“Minor band at 1443 Three various biochars were produced through oxygencm-1 from CH scissoring [44].”
Simultaneous immobilization of heavy metals in soil environment by pulp and paper derived nanoporous biochars DOI: 10.1007/s40201-018-0294-6
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