Hvad absorberer ved 1035 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1035 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 1035 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 | 39 | 35 | 1,0 |
| Methoxy (OCH3) | 36 | 32 | 1,0 |
| Methacrylate | 36 | 32 | 1,0 |
| Acetate | 36 | 32 | 1,0 |
| Hydroxyl (O-H) | 18 | 18 | 1,0 |
| Silicon-oxygen (Si-O) | 14 | 14 | 1,0 |
| Carbohydrate | 10 | 10 | 1,0 |
| Alkyl C-H | 9 | 8 | 1,0 |
| Phosphate (PO4) | 8 | 6 | 1,0 |
| Silicon (Si) | 7 | 7 | 1,0 |
| Siloxane (Si-O-Si) | 7 | 7 | 1,0 |
| Metal oxygen | 5 | 5 | 1,0 |
| Phosphorus | 4 | 4 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Protein | 3 | 3 | 1,0 |
| S eq o | 3 | 2 | 1,0 |
| Aromatic ring | 3 | 2 | 1,0 |
| Oxygen heterocycle | 2 | 2 | 1,0 |
| N h | 2 | 2 | 1,0 |
| Lignin | 2 | 2 | 1,0 |
| Sulfonyl | 2 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Sulfonate | 1 | 1 | 1,0 |
| Thiocarbonyl | 1 | 1 | 1,0 |
| Phospholipid | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 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 |
|---|---|---|---|
| cellulose | 1035, 1735, 1650 | Acetate, Methacrylate, C-O single bond | 1 |
| glucose | 1035, 1740, 1400 | C-O single bond, Methacrylate, Acetate | 1 |
| calcium phosphate | 1035, 1070, 1149 | C-O single bond, Methoxy (OCH3), Methacrylate | 1 |
| lignin | 1035, 1510, 1738 | 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 1035 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
-
Sulfonyl tillid 1,0
“FTIR showed peak at 26 cm-1 1035 which corresponded to O=S=O stretching of sulphonic (-SO 3H) group.”
Balan 等 - 2021 - Esterification of residual palm oil using solid ac DOI: 10.1016/j.jtice.2012.07.001. -
Hydroxyl (O-H) tillid 1,0
“of OH groups [49] and bands at 1150, 1074 and 1035 cm-1 refer to glycosidic bonds of type C-O-C cm-1.”
Development of Composite Scaffolds Based on Cerium Doped-Hydroxyapatite and Natural Gums—Biological and Mechanical Properties DOI: 10.3390/ma12152389 -
Hydroxyl (O-H) tillid 1,0
“were subjugated to drought conditions, one may expect to cm-1 C-O differences 1035 peak associated with stretching of primary observed established in metabolites associated with alcohols in lignin and polysaccharides.”
Bryant 等 - 2023 - Variable lignin structure revealed in Populus leav DOI: 10.1039/d3ra03142j -
C-O single bond tillid 1,0
“Medium to weak intensity 1035cm-1 C-OH peaks at region were assigned to in alcohols and 3.”
Fossil cutin of Johnstonia coriacea (Corystospermaceae, Upper Triassic, Cacheuta, Argentina) DOI: 10.1016/j.coal.2018.02.016 -
Silicon (Si) tillid 1,0
“Another evidence of the silylation reaction is shown by the cm-1 increase in intensity of the peak at 1035 which is assigned to the overlapping of SiO-Si band with the C-O stretching of cellulose as explained by Frone et al.”
Indarti 等 - 2019 - Silylation of TEMPO oxidized nanocellulose from oi DOI: 10.1016/j.ijbiomac.2019.05.161 -
tillid 1,0
“The absorbance peak at 1035 was due to vibration of functional groups of Ti-O-C[20] cm-1”
The preparation and characterization of the Ni-NiO/TiO2 hollow composite materials on micro-nano cellulose fibers DOI: 10.1016/j.vacuum.2018.06.044 -
Acetate tillid 1,0
“cm-1 between 1200 and 1100 is region of hemicellulose and cellulose, which attained a maximum value around cm-1 cm-1 cm1035 due to C-O stretching [14].”
Lun 等 - 2017 - Fourier Transform Infrared Spectroscopy (FTIR) ana DOI: 10.1063/1.4981871 -
Carbohydrate tillid 1,0
“cm-1 3b), it was clear that the glucose peak at 1035 decreased with decreasing glucose u s cm-1 content, whereas the lactate peak at 1122 increased with increasing lactate content.”
Nondestructive assessment of tissue engineered cartilage based on biochemical markers in cell culture media: Application of attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy DOI: 10.1039/d1an02351a.
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