Hvad absorberer ved 1027 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1027 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 1027 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 | 15 | 14 | 1,0 |
| Methoxy (OCH3) | 12 | 11 | 1,0 |
| Methacrylate | 12 | 11 | 1,0 |
| Acetate | 12 | 11 | 1,0 |
| Silicon-oxygen (Si-O) | 6 | 4 | 1,0 |
| Amide | 5 | 5 | 1,0 |
| Hydroxyl (O-H) | 5 | 5 | 1,0 |
| Carbohydrate | 4 | 4 | 1,0 |
| Alkyl C-H | 4 | 4 | 1,0 |
| Silicon (Si) | 3 | 2 | 1,0 |
| Ketone | 2 | 2 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Metal oxygen | 2 | 2 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Thiocarbonyl | 1 | 1 | 1,0 |
| Lignin | 1 | 1 | 1,0 |
| Silicate | 1 | 1 | 1,0 |
| Silanol (Si-OH) | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| C c single bond | 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 |
|---|---|---|---|
| silica | 1027, 1100, 1080 | Methacrylate, Acetate | 1 |
| TiO2 | 1027, 1700, 1093 | Methacrylate, Acetate, C-O single bond | 1 |
| ZnO | 1027, 1400, 3430 | Acetate, Methacrylate, C-O single bond | 1 |
| polystyrene | 1027, 1020, 1600 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| honey | 1027, 2005, 1199 | Methacrylate, Acetate, C-O single bond | 1 |
| ZnO nanoparticles | 1027, 1219, 1726 | 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 1027 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
“1137 C-O stretching (ST) 1027 carbohydrate 939”
Artemisia 等 - 2019 - The Properties of Brown Marine Algae Sargassum tur DOI: 10.14499/indonesianjpharm30iss1pp43 -
Acetate tillid 1,0
“The peaks at 1027 and that honey was the most abundant ingredient in the 1249cm(cid:3)1 C-O were due to the stretching of in the mixture (calibration) samples that were mixtures of C-OH”
Cebi 等 - 2020 - An evaluation of FTIR spectroscopy for prediction DOI: 10.1080/00218839.2019.1707009 -
tillid 1,0
“Another peak was observed at 1027cm-1 1028 due to the Ti-O-C bond in the hybrid [41].”
Robust Interface on ENR-50/TiO2 Nanohybrid Material Based Sol-Gel Technique: Insights into Synthesis, Characterization and Applications in Optical DOI: 10.1016/j.arabjc.2020.06.013 -
Aromatic ring tillid 1,0
“The bending of the CH2 group occurs at 1451 Vibrio fischeri The ecotoxicity test was performed with for the aqueous phases of cm-1, while the bending of the aromatic C-H groups has characteristic peaks at 1027 and (INH) experiments M1-24 an”
Optimization of Polystyrene Biodegradation by Bacillus cereus and Pseudomonas alcaligenes Using Full Factorial Design DOI: 10.3390/polym14204299 -
Amide tillid 1,0
“FTIR spectra Implants of FIB and HA-FIB films exhibited distinctive absorption maxima, in specific positions of FIB random MatrixAssistedPulsedLaserEvaporation 1540cm-1 1654cm-1 1243cm-1 1027cm-1 (MAPLE) coil form: amide II, amide I, amide”
Composite biocompatible hydroxyapatite⠍silk fibroin coatings for medical implants obtained by Matrix Assisted Pulsed Laser Evaporation DOI: 10.1016/j.mseb.2009.10.004 -
tillid 1,0
“By comparison of FTIR spectra of related silica cm-1 ∼1027 can be assigned to vibration modes glasses and their liquid solutions the peak at on the surface of silica particles.”
Osswald 和 Fehr - 2006 - FTIR spectroscopic study on liquid silica solution DOI: 10.1007/s10853-006-7327-8 -
Acetate tillid 1,0
“The sharp peak at 1350 indicates C-N stretch of the aromatic amines cm-1 and the carboxylic acid, while the peak at 1027 could be assigned to C-O stretching vibrations of alcohols, esters, ethers, C-N stretching of aliphatic amines, and car”
Abdelmigid 等 - 2022 - Green Synthesis of Zinc Oxide Nanoparticles Using DOI: 10.3390/molecules27041236 -
tillid 1,0
“clayey minerals, Si-O stretch at 1027 (see Figures S7, S8, S10, S12 and S14) [42].”
New Insights into the Medieval Hispano-Muslim Panel Painting: The Alfarje Found in a Balearic Casal (Spain) DOI: 10.3390/molecules28031235
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