Hvad absorberer ved 1162 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1162 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 1162 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 |
|---|---|---|---|
| C-O single bond | 17 | 17 | 1,0 |
| Methoxy (OCH3) | 16 | 16 | 1,0 |
| Methacrylate | 16 | 16 | 1,0 |
| Acetate | 16 | 16 | 1,0 |
| Alkyl C-H | 11 | 11 | 1,0 |
| Ester | 4 | 4 | 1,0 |
| Secondary amine | 3 | 3 | 1,0 |
| C n single bond | 3 | 3 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| C c single bond | 3 | 3 | 1,0 |
| Silicon-oxygen (Si-O) | 3 | 3 | 1,0 |
| Siloxane (Si-O-Si) | 2 | 2 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| Hydrogen bond | 2 | 2 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Carbohydrate | 2 | 0 | 1,0 |
| Silicon nitrogen | 1 | 1 | 1,0 |
| Lignin | 1 | 1 | 1,0 |
| Perchlorate | 1 | 1 | 1,0 |
| Sulfonate | 1 | 1 | 1,0 |
| Borate | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 0,8 |
Rangering afspejler akkumuleret litteraturevidence, ikke en enkelt fast regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| Cellulose | 1162, 1735, 1650 | Acetate, Methacrylate, C-O single bond | 1 |
| collagen | 1162, 1408, 1660 | Methacrylate, Acetate, Methoxy (OCH3) | 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 1162 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
“The Raman spectrum of PANI that consists cm-1 of peaks at 1162, 1244, 1348, 1482, 1598 and 1609 corresponds to the in-plane C-H bending of the benzeC-N+ noid/quinoid rings, the weak C-N stretching mode, stretching, C=C stretching of the ben”
Gebreegziabher 等 - 2020 - Polyaniline-graphene quantum dots (PANI-GQDs) hybr DOI: 10.1007/s42823-019-00064-6 -
Acetate tillid 1,0
“Shifting of bands in this region is due to interactions between the charged functional groups of the C-O stretching band and the C-O-H group band from 1162 cm-1 (κ-carrageenan) to 1151 cm-1 (κ-carrageenan/starch 2:1) that can be related to”
Preparation and Characterization of Super-Absorbing Gel Formulated from -Carrageenan–Potato Peel Starch Blended Polymers DOI: 10.3390/polym13244308 -
Alkyl C-H tillid 1,0
“The peak for C-O-C (1248 cm-1 ascribable to the deformation of the C-H rocking Meanwhile, the peaks at 1161.72, 1104.35, and 1094.86”
Characterization of cellulose extracted from oil palm empty fruit bunch DOI: 10.1063/1.4931295 -
Alkyl C-H tillid 1,0
“The peak at 1162 is associated with to C-H stretching [30].”
Application of a Low-Cost Cellulose-Based Bioadsorbent for the Effective Recovery of Terbium Ions from Aqueous Solutions DOI: 10.3390/met10121641 -
Hydroxyl (O-H) tillid 1,0
“intensity was found at wavenumbers 1161.52 and 1118.47 However, the cm-1 compound class observed was different at these two peaks where 1161.52 indicates cm-1 tertiary alcohol, meanwhile, 1118.47 represents secondary alcohol.”
Characterization of Malaysian Jatropha Seed Oil and Discovering the Process of Powdered Jatropha Leaves DOI: 10.3390/pr10122577 -
Acetate tillid 1,0
“The bands at 1162, 1115, 1058 and 570 L.V.A.Gurgeletal./IndustrialCropsandProducts36(2012)560-571 asymmetric C-O-C bridge stretching, anhydroglucopyranose ring, involved in the main decomposition step of the cellulose residues.”
Characterization of depolymerized residues from extremely low acid hydrolysis (ELA) of sugarcane bagasse cellulose: Effects of degree of polymerization, crystallinity and crystallite size on thermal decomposition DOI: 10.1016/j.indcrop.2011.11.009 -
C-O single bond tillid 1,0
“3of14 cm-1 lower ratio of the 1162 and 1172 bands (C-OH stretches of hydroxyproline) were observed in the cardiomyopathic tissue.”
Chrabaszcz 等 - 2020 - Tracking Extracellular Matrix Remodeling in Lungs DOI: 10.3390/molecules25010236 -
Alkyl C-H tillid 1,0
“is associated with CH2 bending of 160∘ C for removal from switchgrass using [EMIM]COOH at 1162cm-1”
Dong 等 - 2015 - An Efficient Process for Pretreatment of Lignocell DOI: 10.1155/2015/978983
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