Hvad absorberer ved 1383 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1383 cm⁻¹ kan pege på flere funktionelle grupper. Nedenfor er de mest sandsynlige tildelinger, rangeret efter hvor meget publiceret bevis der understøtter hver — hver enkelt spores til litteratur (DOI) og krydsvalideres mod vores 130.000+ referencespektre og vidensgraf.
Backed by 8 cited sources
Hurtigt svar
Et bånd nær 1383 cm⁻¹ fortolkes normalt ved at kontrollere, hvilke funktionelle grupper der gentagne gange forekommer der i litteraturen, og derefter bekræfte mindst en eller to yderligere peaks i den samme prøve. Denne side rangerer disse tildelinger efter akkumuleret evidens snarere end efter en enkelt fast lærebogsregel.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| Alkyl C-H | 16 | 14 | 1,0 |
| Methacrylate | 12 | 11 | 1,0 |
| Acetate | 12 | 11 | 1,0 |
| Methoxy (OCH3) | 9 | 9 | 1,0 |
| C-O single bond | 8 | 8 | 1,0 |
| Carboxyl (COOH) | 8 | 7 | 1,0 |
| Hydroxyl (O-H) | 6 | 6 | 1,0 |
| Methyl | 4 | 4 | 1,0 |
| Water (H2O) | 3 | 3 | 1,0 |
| Ketone | 3 | 2 | 1,0 |
| Ester | 3 | 2 | 1,0 |
| Carbonyl (C=O) | 3 | 2 | 1,0 |
| Amide | 3 | 2 | 1,0 |
| Alkene (C=C) | 3 | 2 | 1,0 |
| Metal oxygen | 2 | 2 | 1,0 |
| Carbonate | 2 | 2 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| Amine primary | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| C=n | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Fluorine (C-F) | 1 | 1 | 0,5 |
| Nitrogen heterocycle | 1 | 0 | 1,0 |
| Carbon dioxide | 1 | 0 | 1,0 |
| Anhydride | 1 | 0 | 1,0 |
Rangering afspejler akkumuleret litteraturevidence, ikke en enkelt fast regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| PMMA | 1383, 1722, 1628 | Methacrylate, Acetate, Alkyl C-H | 1 |
| Al2O3 | 1383, 1722, 2981 | Methacrylate, Acetate, Alkyl C-H | 1 |
| nanocomposite | 1383, 2921, 3300 | Alkyl C-H, Methacrylate, Acetate | 1 |
| CS | 1383, 1645, 1720 | Methacrylate, Acetate, Alkyl C-H | 1 |
| ZnO NPs | 1383, 1664, 875 | Alkyl C-H, Methacrylate, Acetate | 1 |
Materialer vises kun, når den samme litteraturpulje understøtter dette bånd og mindst en yderligere karakteristisk top.
Spektrumlogik
Dette bånd bliver meningsfuldt kun, når det læses sammen med sine nabotoppe. I praksis ser analytikere først på tildelingerne ovenfor, og kontrollerer derefter, om den samme prøve også viser andre toppe, der forventes for det samme strukturelle motiv. Et enkelt bånd nær 1383 cm⁻¹ er normalt ikke nok til materialeidentifikation alene.
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
-
Alkyl C-H tillid 1,0
“cm-1) cm-1), cm-1).9, 10 CH stretching (954 and C-C vibration (868 -CHbending (754 and 1383 cm-1 The peak at 872 observed in all samples which is due to C-C stretching and featured for cm-1 amorphous properties of films.”
Ghosh 等 - 2020 - Blown films fabrication of poly lactic acid based DOI: 10.1016/j.mtcomm.2019.100737 -
Hydroxyl (O-H) tillid 1,0
“cm-1), amide I or C=O stretching (1705.62 and 1631.41 amide II or N-H bending and stretching cm-1), cm-1), (1518.75 C=C bending in aromatic rings of phenolic compounds (1455.77 C-N cm-1), cm-1) stretching groups (1383.22 deformation of O-H”
Encapsulation of olive leaf phenolics within electrosprayed whey protein nanoparticles; production and characterization DOI: 10.1016/j.foodhyd.2019.105572 -
Acetate tillid 1,0
“FTIR spectra (EIS) measurements, the highest ionic conductivity at room temperature is determined as cm-1, cm-1 twisting mode at 1383.43 C=O stretching mode at 1721.56 which proven the interaction analysis showed CH2 cm-1.”
Effect of Al2O3 in poly(methyl methacrylate) composite polymer electrolytes DOI: 10.1063/1.5034559 -
Hydroxyl (O-H) tillid 1,0
“The peak at 1632 cm-1 The band at 1383 is corresponding to bending vibrations of -OH in phenols or symmetric stretching vibration”
Vindhya 等 - 2019 - Dielectric properties of Zinc Oxide Nanoparticles DOI: 10.1063/1.5093888 -
Acetate tillid 1,0
“Strong bands at 1382.96 1230.58 and 1105.21 are cm-1, cm-1, corresponding to C-O stretching vibrations.”
Al-Qahtani 等 - 2022 - Structural, morphological, optical and electrochem DOI: 10.15251/JOR.2022.182.187 -
Hydroxyl (O-H) tillid 1,0
“bending vibrations of the hydroxyl groups (O-H) for the adsorbed water molecules on the Whereas, the bands located at 1383, 1087, and 1047 cm-1 could be attributed to the stretchsamples' surfaces, depending upon the blending of these specim”
Biosynthesis, Physicochemical and Magnetic Properties of Inverse Spinel Nickel Ferrite System DOI: 10.3390/cryst12111542 -
Carboxyl (COOH) tillid 1,0
“At 1584 cm-1 was the stretching vibration ( , asymmetric (v stretching) of in , and the peak at 1383 was attributed to the vibration s, symmetric a COO-”
A Soluble Humic Substance for the Simultaneous Removal of Cadmium and Arsenic from Contaminated Soils DOI: 10.3390/ijerph16244999 -
Acetate tillid 1,0
“the O-C asymmetric mode of the ester groups was observed at appeared at 1383 cm-1, cm-1 1088 and the peaks appeared at 957 and 913 were attributed to the rocking -1, mode of CH 3.”
Boudjema 等 - 2020 - Green composites based on Atriplex halimus fibers DOI: 10.1515/polyeng-2020-0068
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