Hvad absorberer ved 1114 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1114 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 1114 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 |
|---|---|---|---|
| Methacrylate | 16 | 14 | 1,0 |
| C-O single bond | 16 | 14 | 1,0 |
| Acetate | 16 | 14 | 1,0 |
| Methoxy (OCH3) | 15 | 13 | 1,0 |
| Alkyl C-H | 7 | 7 | 1,0 |
| Silicon-oxygen (Si-O) | 5 | 5 | 1,0 |
| Amide | 5 | 5 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Secondary amine | 3 | 3 | 1,0 |
| C n single bond | 3 | 3 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Nucleic acid | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 2 | 2 | 1,0 |
| N h | 2 | 2 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| C=n | 1 | 1 | 1,0 |
| Sulfonate | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Metal hydroxyl | 1 | 1 | 1,0 |
| Thiocarbonyl | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Amino acid | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 0,9 |
| Lignin | 1 | 1 | 0,9 |
| Nitrogen heterocycle | 1 | 1 | 0,9 |
Rangering afspejler akkumuleret litteraturevidence, ikke en enkelt fast regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| Chitosan | 1114, 1650, 1655 | Acetate, Methacrylate, C-O single bond | 2 |
| zinc oxide | 1114, 1627, 1638 | Methacrylate, Acetate, C-O single bond | 1 |
| CdS | 1114, 1375, 1092 | Methoxy (OCH3), Methacrylate, C-O single bond | 1 |
| zinc oxide nanoparticles | 1114, 1744, 1627 | Acetate, Methacrylate, Methoxy (OCH3) | 1 |
| cotton | 1114, 1030, 1638 | Methacrylate, Acetate, C-O single bond | 1 |
| chitin | 1114, 1650, 1655 | Methacrylate, Acetate, C-O single bond | 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 1114 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
-
Acetate tillid 1,0
“The band present at 1114 is due to the (C-O) stretching vibrations which corresponds to cm-1 the secondary alcohol.”
Dhayalan 等 - 2021 - Eco friendly synthesis and characterization of zin DOI: 10.1515/nanofab-2020-0104 -
Ring structure tillid 1,0
“cm-1 cm-1 1256 (C-H bending and CH symmetrical deformation), 1069 (asymmetric 3 cm-1 in-phase ring-stretching mode), 1023 (C-O-C asymmetric in-phase ring-stretching), 1159cm-1 1114cm-1”
Antimicrobial Activity of Chemically and Biologically Treated Chitosan Prepared from Black Soldier Fly (Hermetia illucens) Pupal Shell Waste DOI: 10.3390/microorganisms9122417 -
tillid 1,0
“The powder X-ray diffraction Accepted 18 November 2008 Available online 24 November 2008 cm-1and cm-1region,besides 617 (FTIR) spectrum showscharacteristic bands duetothe sulfate ion in1114 bands due to the amine moiety.”
Nagaraju 等 - 2009 - A facile low temperature hydrothermal route to CdS DOI: 10.1016/j.matlet.2008.11.032 -
tillid 1,0
“The internal asymmetric stretching vibration and external symmetric Si-O-T stretching of linkage were evidenced from the cm(cid:1)1, absorption bands at around 1114 and 797 respeccm(cid:1)1 tively.15 The characteristic bands of 549 and 1226”
Synthesis of ZSM5 Zeolite Particles Using Triethanol Amine as StructureDirecting Agent DOI: 10.1111/j.1551-2916.2011.05006.x -
tillid 1,0
“N-H C-N (coupled mode of bending and stretching cm-1 of a negative band at 1114 to a lower frequency by 7 vibrations) of backbone amides (22).”
Noguchi 等 - 1999 - Structure of a histidine ligand in the photosynthe DOI: 10.1021/bi990631 -
Alkyl C-H tillid 1,0
“cm-1, At peak 1114 the major increase in the FTIR spectra of dried, dyed, and smoked specimens was attributed to the C-H functional group in guaiacyl and syringyl (lignin) [22].”
Investigating the Effect of Smoke Treatment on Hygroscopic Characteristics of Bamboo by FTIR and Raman Spectroscopy DOI: 10.3390/ma15041544 -
Acetate tillid 1,0
“The absorption bands at 1114 cm-1 (C-O stretching) and 1628 and 1457 (C=O of amide I and II) β-CD-CS.”
Singh 等 - 2017 - Sustainable fragrance cum antimicrobial finishing DOI: 10.1016/j.scp.2017.01.003 -
Amide tillid 1,0
“Spectra cm‾1 for FeS-isoprop-DTC shows a medium peak at 2926 that is related to the C-H stretch in cm‾1 addition to another medium peak at 1114 corresponding to C-N stretch.”
Siraj 等 - 2020 - Synthesis, characterization and electrochemical in DOI: 10.1016/j.mee.2020.111400
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