Hvad absorberer ved 1079 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1079 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 1079 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 |
|---|---|---|---|
| Methoxy (OCH3) | 7 | 7 | 1,0 |
| Methacrylate | 7 | 7 | 1,0 |
| C-O single bond | 7 | 7 | 1,0 |
| Acetate | 7 | 7 | 1,0 |
| Phosphate (PO4) | 4 | 4 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| Amino acid | 2 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 0 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Phosphorus | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| S eq o | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Phospholipid | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 0,7 |
| Siloxane (Si-O-Si) | 1 | 0 | 1,0 |
| Silicon carbon | 1 | 0 | 1,0 |
| Silanol (Si-OH) | 1 | 0 | 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 |
|---|---|---|---|
| starch | 1079, 1650, 1540 | Methacrylate, Acetate, C-O single bond | 1 |
| Polysaccharide | 1079, 1637, 1320 | Methacrylate, Acetate, C-O single bond | 1 |
| plasma | 1079, 1656, 1650 | Methacrylate, Acetate | 1 |
| collagen | 1079, 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 1079 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
“diffraction peaksemerged.This isbecause the combination tobeasymmetricC-O-Cstretchingvibration.Theabsorption cm-1 ofstrongshearforceandhightemperatureduringextrusion peak at 1079 was the stretching vibration of C-O, C-C 1050-978 cm-1 severe”
Cao 等 - 2020 - Optimization of the preparation process of mung be DOI: 10.1515/ijfe-2020-0025 -
Phospholipid tillid 1,0
“LLM confirmed rule peak-group candidate”
Depciuch 等 - 2022 - EFFECT OF HIGH BLOOD CORTISOL CONCENTRATION ON THE DOI: 10.21203/rs.3.rs-228476/v1 -
Acetate tillid 1,0
“are 1143, 1079, 927, and 862 the internal structure of the grain, given that through miThe bands at 1143 and C-O-C C-OH cm-1 croscopy it was found that the granule maintains its 1079 correspond to and stretching”
Roa Acosta 等 - 2020 - Structural and thermal properties of the amaranth DOI: 10.1515/ijfe-2020-0024 -
S eq o tillid 1,0
“There are three vibrations at 1402, 1330, cm-1 and 1079 due to S=O stretching, the sulfonate group (SO 3) as it is connected to the 10”
Power-Dependent Nonlinear Optical Behaviours of Ponceau BS Chromophore at 532 nm via Z-Scan Technique DOI: 10.1016/j.jphotochem.2020.112574 -
Acetate tillid 1,0
“C-O-C sites is assigned to the peak at 1079 since this peak”
Yusuf 等 - 2016 - From crab shell to solar cell a gel polymer elect DOI: 10.1039/C6RA04188D. -
tillid 1,0
“cm-1 The deformation band found at 1079 is attributed to the oxidation of the lateral chains of cm-1 δ(CN), amino acids as well as to methionine, while the band at 1030 can be attributed to which is found in amino acids such as glycine, pro”
The Comparative Study of the State of Conservation of Two Medieval Documents on Parchment from Different Historical Periods DOI: 10.3390/ma13214766 -
Acetate tillid 1,0
“The peak at 1159 cm-1 is produced by the cm-1 vibration of C-O, while the peaks at 1079 and 1012 belong to the stretching vibration of C-O in stretching vibration of C-O, while the peaks at 1079 and 1012 cm-1 belong to the stretching vibrat”
Flotation and Adsorption of a New Polysaccharide Depressant on Pyrite and Talc in the Presence of a Pre-Adsorbed Xanthate Collector DOI: 10.3390/min7030040 -
Amide tillid 1,0
“In other words, normalized peak at 2959 area of 1079 cm-1, a to the observed decrease in amide I / 1241 these variables were found higher in the vaccinated group, significant decrease was also observed in the band area compared with their a”
CoronaVac (Sinovac) COVID-19 vaccine-induced molecular changes in healthy human serum by infrared spectroscopy coupled with chemometrics DOI: 10.3906/biy-2105-65
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