Hvad absorberer ved 1216 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1216 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 1216 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 | 7 | 7 | 1,0 |
| Acetate | 7 | 7 | 1,0 |
| C-O single bond | 6 | 6 | 1,0 |
| Methoxy (OCH3) | 5 | 5 | 1,0 |
| Carboxyl (COOH) | 4 | 3 | 1,0 |
| Phosphate (PO4) | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Phosphorus | 2 | 2 | 1,0 |
| Ketone | 2 | 2 | 1,0 |
| Ester | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 2 | 2 | 1,0 |
| Fluorine (C-F) | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Nucleic acid | 1 | 1 | 1,0 |
| Carbon dioxide | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Silicon hydride | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 0,95 |
| N-O 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 |
|---|---|---|---|
| SiO2 | 1216, 1739, 699 | Methoxy (OCH3) | 1 |
| graphene oxide | 1216, 1150, 3400 | Methacrylate, Acetate, C-O single bond | 1 |
| GO | 1216, 1720, 1182 | Methacrylate, Acetate, C-O single bond | 1 |
| activated carbon | 1216, 1575, 1210 | 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 1216 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
-
C-O single bond tillid 1,0
“To establish a thermal degradation assessment methodology in rapid 1452 Moreover, the growth of a shoulder is detected in the high cm-1 high-temperature processing of PEEK and CF-PEEK, samples that went frequency side of the ether peak at 1”
Detecting, characterising and assessing PEEK’s and CF-PEEK’s thermal degradation in rapid high-temperature processing DOI: 10.1016/j.polymdegradstab.2022.110096 -
Amide tillid 1,0
“The FTIR spectra of AC in Acknowledgement ACINA shift in N-H stretching frequency from cm-1 3363 to 3280 and C-N stretching from 1216 The research was funded by DRPM of Ministry of cm-1.”
Wicaksono 等 - 2017 - Enhancement of solubility and dissolution rate of DOI: 10.4314/tjpr.v16i7.6 -
Acetate tillid 1,0
“After the nitric acid treatment, the peak was observed cm-1 at 1700 due to the C=O stretches of carboxyl or carbonyl groups [33], and the C-O cm-1 stretching at 1216 [34] proved that oxidation generates more oxygenated functional groups on”
Modified Activated Carbon for Copper Ion Removal from Aqueous Solution DOI: 10.3390/pr10010150 -
Silicon (Si) tillid 1,0
“The band at 1216 (S-28) can be assigned to the Si-O stretching vibrations in Q3 site, characteristic for presence of 1.1 nm tobermorite, while the bands at”
Colovic 等 - 2013 - Creating of Highly Active Calcium-Silicate Phases DOI: 10.2298/SOS1303341C -
Hydroxyl (O-H) tillid 1,0
“cm-1), cm-1), cm-1), stretching (1615 C-H bending (1438 O-H bending (1216 C-O-C cm-1), O-H bending (1216 cm-1), C-O-C stretching (1066 cm-1), -CH-O-CHstretching (1003 cm-1), cm-1)”
Substantial Proton Ion Conduction in Methylcellulose/Pectin/Ammonium Chloride Based Solid Nanocomposite Polymer Electrolytes: Effect of ZnO Nanofiller DOI: 10.3390/membranes12070706 -
Acetate tillid 1,0
“A significant decrease in the O-H stretching band at 3347 with a cm-1 cm-1 corresponding increase in the C=O stretching absorbance at 1740 and C-O stretching at 1216 indicates esterification of wood.”
Giridhar 等 - 2017 - DIMENSIONAL STABILIZATION OF WOOD BY CHEMICAL MODI DOI: 10.4067/S0718-221X2017005000002 -
Aromatic ring tillid 1,0
“cm-1 In Figure 4, the diffraction peaks of the corn stalks The bands at 1216 and 878 were assigned to the stretch20.7°, 26.5°, 27.7°, 49.9° at and indicated the crystal area ing of the aromatic ring and the out-of-plane bending of -CH exist”
Guo 等 - 2015 - Synthesis and application of functionalized ionic DOI: 10.1515/epoly-2014-0195 -
Acetate tillid 1,0
“The slight vibrations at 1183 and 957 cm-1 correspond to epoxy groups (C-O), and 2 cm-1 The influential bands at 1216 and 1088 were determined through a siloxane group the 1102 cm-1 is in agreement with C-O of COOH groups [53].”
Sustainable Remedy Waste to Generate SiO2 Functionalized on Graphene Oxide for Removal of U(VI) Ions DOI: 10.3390/su14052699
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