Hvad absorberer ved 1215 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1215 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 1215 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 | 8 | 8 | 1,0 |
| C-O single bond | 8 | 8 | 1,0 |
| Acetate | 8 | 8 | 1,0 |
| Methoxy (OCH3) | 7 | 7 | 1,0 |
| Silicon-oxygen (Si-O) | 3 | 3 | 1,0 |
| Alkyl C-H | 3 | 3 | 1,0 |
| Carboxyl (COOH) | 3 | 3 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 2 | 2 | 1,0 |
| Nucleic acid | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| Siloxane (Si-O-Si) | 2 | 2 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| Acetyl | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
| Water (H2O) | 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 |
|---|---|---|---|
| PVA | 1215, 1660, 2930 | Acetate, Methacrylate, C-O single bond | 1 |
| CuO | 1215, 453, 1000 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| DNA | 1215, 1712, 1660 | 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 1215 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
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Alkyl C-H tillid 1,0
“suggested the active chemical functional groups concentration of H 2 1437cm-1, 1373cm-1 1215cm-1 eCH CeOeC peak at peak at and peak at were susceptible to of>CH 2 3 oxidation.”
Effect of oxidation processing on the surface properties and floatability of Meizhiyou long-flame coal DOI: 10.1016/j.fuel.2017.08.053 -
C-S single bond tillid 1,0
“cm-1 Moreover, the absorption around 1214.89 and 1216.14 represents the availability of sulfated functional groups such as C-S-O and S-O [50,54].”
Characterization of Polyhydroxybutyrate, PHB, Synthesized by Newly Isolated Haloarchaea Halolamina spp. DOI: 10.3390/molecules27217366 -
Amide tillid 1,0
“FTIR peaks and their assignments for as-deposited Sb2S3 0.01M PAni 0.05M PAni Peaks Functional group 591 592 592 Sb2S3 Symmetric bending Sb2S3 Charge delocalization 1024 1020 1046 C-N+ stretching - 1215 - PAni”
Enhanced electrical response in Sb2S3 thin films by the inclusion of polyaniline during electrodeposition DOI: 10.1016/j.physb.2009.10.016 -
N-O bond tillid 1,0
“All the spectra are shifted along the y-axis for clarity and the region is ~ 4000 to 375 cm-1 samples after the removal process, suggesting that the intense double band at 1215 and 1246 is attributed hydrogel left no residues (within the de”
Evaluation of polyvinyl alcohol–borax/agarose (PVA–B/AG) blend hydrogels for removal of deteriorated consolidants from ancient Egyptian wall paintings DOI: 10.1186/s40494-019-0264-z -
Nucleic acid tillid 1,0
“In the dehydrated state for the cm-1 cm-1, same drugs the 1225 had split into two bands 1215 and 1234 which indicates the partial 2cm-1 transformation into the A-DNA conformation [38].”
The Application of ATR-FTIR Spectroscopy and the Reversible DNA Conformation as a Sensor to Test the Effectiveness of Platinum(II) Anticancer Drugs DOI: 10.3390/s18124297 -
tillid 1,0
“Bands at about 1215, 1085, 807, and are assignable to the asymmetric and symmetric stretching ] (] (a) as(Si-O-Si) and s(Si-O-Si)) of the support framework.”
Alahmadi 等 - 2013 - Preparation of Organic-Inorganic Hybrid Materials DOI: 10.1155/2013/634863 -
Hydroxyl (O-H) tillid 1,0
“cm-1, cm-1, cm-1, cm-1, cm-1, cm-1 1736 1621 1560 1396 1215 and 1045 related to OH cm-1, 1736 cm-1, 1621 cm-1, 1560 cm-1, 1396 cm-1, 1215 cm-1, and 1045 cm-1 related to OH sp2-hybridized groups, the stretching of carboxylic acid groups, C g”
Effect of rGO wt.% on the Preparation of rGO/CuO Nanocomposites at Different Test Periods and Temperatures DOI: 10.3390/cryst12101325 -
C-O single bond tillid 1,0
“The cm-1 band at 1650 has been assigned to the carbonyl stretching vibration, a number of cm-1, skeletal ring vibrations at 1598, 1490 and 1413 the asymmetric stretching of ether cm-1, group at 1277 and 1190 the aromatic hydrogen in-plane d”
Mechano-Chemical Properties of Electron Beam Irradiated Polyetheretherketone DOI: 10.3390/polym14153067
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