Hvad absorberer ved 1150 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1150 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 1150 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 | 61 | 59 | 1,0 |
| Acetate | 57 | 56 | 1,0 |
| Methacrylate | 56 | 55 | 1,0 |
| Methoxy (OCH3) | 54 | 53 | 1,0 |
| Hydroxyl (O-H) | 17 | 16 | 1,0 |
| Alkyl C-H | 13 | 12 | 1,0 |
| Carbohydrate | 12 | 12 | 1,0 |
| Ester | 9 | 9 | 1,0 |
| Amide | 7 | 7 | 1,0 |
| C c single bond | 7 | 6 | 1,0 |
| Carboxyl (COOH) | 6 | 6 | 1,0 |
| S eq o | 4 | 4 | 1,0 |
| Carbonyl (C=O) | 4 | 4 | 1,0 |
| Aromatic ring | 4 | 4 | 1,0 |
| Siloxane (Si-O-Si) | 4 | 3 | 1,0 |
| Ring structure | 3 | 3 | 1,0 |
| Secondary amine | 3 | 3 | 1,0 |
| C n single bond | 3 | 3 | 1,0 |
| Silicon-oxygen (Si-O) | 3 | 3 | 1,0 |
| Ketone | 3 | 3 | 1,0 |
| Alkene (C=C) | 3 | 3 | 1,0 |
| Nucleic acid | 3 | 3 | 1,0 |
| Aldehyde (CHO) | 3 | 3 | 0,9 |
| Lignin | 2 | 2 | 1,0 |
| N h | 2 | 2 | 1,0 |
| Sulfate (SO4) | 2 | 2 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| Phosphate (PO4) | 2 | 2 | 1,0 |
| Fluorine (C-F) | 2 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Oxygen heterocycle | 1 | 1 | 1,0 |
| Borate | 1 | 1 | 1,0 |
| Lipid | 1 | 1 | 1,0 |
| Protein | 1 | 1 | 1,0 |
| Amine primary | 1 | 1 | 1,0 |
| Sulfonyl | 1 | 1 | 1,0 |
| Chitosan | 1 | 1 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| Silicate | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Silicon nitrogen | 1 | 1 | 0,6 |
Rangering afspejler akkumuleret litteraturevidence, ikke en enkelt fast regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| Silica | 1150, 1100, 1080 | Methacrylate, Acetate | 1 |
| STARCH | 1150, 1650, 1540 | Methacrylate, Acetate, C-O single bond | 1 |
| silica nanoparticles | 1150, 1718, 2925 | Methacrylate | 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 1150 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 9 cm-1 band observed at 1150 could be attributed to C-O, CH stretching, bending vibrations 2”
Prediction of peroxide value in omega-3 rich microalgae oil by ATR-FTIR spectroscopy combined with chemometrics DOI: 10.1016/j.foodchem.2017.01.013 -
Acetate tillid 1,0
“The major peaks at 1150 cm(cid:0) 1 C-O-H C-O-C peak position is slightly shifted due to the difference in the ionic radii of 2930 correspond to group, group, the”
Synthesis, structural and antibacterial activity of pure, Fe doped, and glucose capped ZnO nanoparticles DOI: 10.1016/j.surfin.2021.101327 -
Silicon (Si) tillid 1,0
“In the fingerprint region, the wavenumbers 1020 and 1150 represent the asymmetric cm-1 cm-1 fingerprint region, the wavenumbers 1020 cm-1 and 1150 cm-1 represent the asymmetric stretching vibrations Si-O-Si.”
Biosynthesized Silica Nanosuspension as Thermal Fluid in Parabolic Solar Panels DOI: 10.3390/e23020142 -
tillid 1,0
“are characteristics of anhydrides, such as the one at On the other hand, when compared to the commercm-1 1150 that is related to the stretching bond cial AL, color and turbidity removal was higher using of -CO group.”
Felipe Tirado 等 - 2017 - EVALUATION OF THE COAGULANT CAPACITY OF STARCH OBT DOI: 10.20937/RICA.2017.33.esp01.11 -
Acetate tillid 1,0
“2 (1-4)-glucosidic cm-1, the the special broad peak of band in poly saccharide unit at 1150 C-O-C cm-1, the (stretching vibration) in OH group stretching vibration peak at 1082 1060-1015 cm-1, cm-1 and peak at is due to CH-OH in the glucose”
Removal of Hexavalent Chromium by Cross-Linking Chitosan and N,N’-Methylene Bis-Acrylamide DOI: 10.1007/s40710-020-00447-2 -
Acetate tillid 1,0
“The peak at 1150 is due to C=O.”
Keyoumu 等 - 2020 - The detailed biological investigations about combi DOI: 10.1016/j.jphotobiol.2019.111666 -
tillid 1,0
“symmetric (1150 stretching vibrational modes.43-45 The former band contains contributions from S-O”
Model-Based Analyses of Confined Polymer Electrolyte Nanothin Films Experimentally Probed by Polarized ATR–FTIR Spectroscopy DOI: 10.1021/acs.jpcc.8b02473 -
Acetate tillid 1,0
“The bands cm-1 at 1150 and 1032 belong to the vibrations of the C-O and C-O-C groups (Fig.”
Identification of sugars and phenolic compounds in honey powders with the use of GC–MS, FTIR spectroscopy, and X-ray diffraction DOI: 10.1038/s41598-020-73306-7
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