Hvad absorberer ved 1367 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1367 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 1367 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 |
|---|---|---|---|
| Alkyl C-H | 11 | 6 | 1,0 |
| Methacrylate | 5 | 3 | 1,0 |
| Acetate | 5 | 3 | 1,0 |
| Hydroxyl (O-H) | 4 | 3 | 1,0 |
| Methoxy (OCH3) | 4 | 2 | 1,0 |
| C-O single bond | 3 | 2 | 1,0 |
| Methyl | 3 | 1 | 1,0 |
| Carbohydrate | 3 | 1 | 1,0 |
| Carboxyl (COOH) | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| Ester | 2 | 1 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Lignin | 1 | 0 | 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 |
|---|---|---|---|
| CeO2 | 1367, 1554, 1630 | Hydroxyl (O-H), Acetate, Methacrylate | 1 |
| bio-based | 1367, 1720, 1740 | Methacrylate, Acetate, Hydroxyl (O-H) | 1 |
| cellulose | 1367, 1735, 1650 | Alkyl C-H, Acetate, Methacrylate | 1 |
| nanocellulose | 1367, 1540, 1646 | Alkyl C-H, Hydroxyl (O-H), Methacrylate | 1 |
| silver nanoparticles | 1367, 1636, 1631 | Hydroxyl (O-H), Alkyl C-H, 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 1367 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
-
Hydroxyl (O-H) tillid 1,0
“A peak at 1367 is due to the symthe hydroxyl group of oxygen, which is very common in samples COOmetric stretching vibration mode of acetate group.”
Investigation on the structural properties of CeO2 nanofibers via CTAB surfactant DOI: 10.1016/j.matlet.2015.07.099 -
tillid 1,0
“In this study, between untreated and nondifference spectrum of Q A A-/Q spectrum were identified several His bands in the Q heme iron-depleted PS II membranes from spinach showed A cm-1 [15N]His-labeled PS II core by measuring a spectrum us”
Noguchi 等 - 1999 - Hydrogen bonding interaction between the primary q DOI: 10.1021/bi982294v -
Aromatic ring tillid 1,0
“These Raman lines are atFigure 5a-c have maxima at ~415-498 cm-1, 621-825 cm-1, 906-1003 cm-1, 1184 cm-1, 1331 C=N stretching, C=C stretching in the quinoid ring and C-C stretching in the benzene ring, tributed to the vibrational modes caus”
The Photoluminescence and Vibrational Properties of Black Phosphorous Sheets Chemically/Electrochemically Functionalized in the Presence of Diphenylamine DOI: 10.3390/polym14214479 -
Amide tillid 1,0
“indazole C-C and C-N stretch with C-H in-plane bend 1367 1387”
Comprehensive analytical and structural characteristics of methyl 3,3-dimethyl-2-(1-(pent-4-en-1-yl)-1H-indazole-3-carboxamido)butanoate (MDMB-4en-PINACA) DOI: 10.1007/s11419-021-00573-y -
Carboxyl (COOH) tillid 1,0
“There are hints that point to a direct interaction of GA carboxylate groups with silver, specifically the strong weakening cm-1 of the 1687 band in aqueous solution (Figure 5a), attributed to carboxylic acid, and cm-1 the enhancement of the”
Vibrational Study (Raman, SERS, and IR) of Plant Gallnut Polyphenols Related to the Fabrication of Iron Gall Inks DOI: 10.3390/molecules27010279 -
C c single bond tillid 1,0
“C=O stretching (amide II band) at around 1643 cm-1, N-H bending (amide II band) at around 1540 cm´1, cm´1, around 3300 C=O stretching (amide II band) at around 1643 N-H bending (amide II characterized by six important absorption bands: the”
Preparation of Bio-Based Polyamide Elastomer by Using Green Plasticizers DOI: 10.3390/polym8070257 -
Hydroxyl (O-H) tillid 1,0
“3267 2887 1590 1406 1229 1009 , , and The absorption bands at 1367 3249cm-1 3600 3000 2400 1800 1200 600 in the FTIR spectra were due to O-H stretching (cm-1 2895cm-1 ) vibration of alcohol and phenol.”
Jemal 等 - 2017 - Synthesis, Characterization, and Evaluation of the DOI: 10.1155/2017/4213275 -
Alkyl C-H tillid 1,0
“The peaks at 1428 cm-1, 1367 cm-1, and 1334 cm-1 corMaterials2021,14,4128 7of12 respond to CH2 and CH stretching and bending vibrations.”
Effect of Nanocellulose on the Properties of Cottonseed Protein Isolate as a Paper Strength Agent DOI: 10.3390/ma14154128
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