Hvad absorberer ved 1384 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1384 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 1384 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 | 18 | 17 | 1,0 |
| Acetate | 14 | 14 | 1,0 |
| Methacrylate | 13 | 13 | 1,0 |
| Amide | 13 | 13 | 1,0 |
| N-O bond | 12 | 11 | 1,0 |
| Carboxyl (COOH) | 11 | 10 | 1,0 |
| Methoxy (OCH3) | 9 | 9 | 1,0 |
| Nitrate | 8 | 7 | 1,0 |
| Secondary amine | 7 | 7 | 1,0 |
| C n single bond | 7 | 7 | 1,0 |
| C-O single bond | 6 | 6 | 1,0 |
| Methyl | 6 | 6 | 1,0 |
| Hydroxyl (O-H) | 6 | 5 | 1,0 |
| N h | 5 | 5 | 1,0 |
| Carbonyl (C=O) | 5 | 5 | 1,0 |
| Alkene (C=C) | 4 | 4 | 1,0 |
| Ketone | 4 | 4 | 1,0 |
| Ester | 4 | 4 | 1,0 |
| Carbonate | 3 | 3 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Carbohydrate | 2 | 2 | 1,0 |
| Sulfate (SO4) | 2 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1,0 |
| N eq o | 2 | 2 | 1,0 |
| Silicon hydride | 1 | 1 | 1,0 |
| Chitosan | 1 | 1 | 1,0 |
| Silanol (Si-OH) | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Amine primary | 1 | 1 | 1,0 |
| Urethane | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Nitrogen heterocycle | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
| Lignin | 1 | 1 | 1,0 |
| N n bond | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| Fluorine (C-F) | 1 | 1 | 0,9 |
| Nitro (NO2) | 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 |
|---|---|---|---|
| humic acid | 1384, 1660, 1220 | Alkyl C-H, Methacrylate, Acetate | 1 |
| copper oxide | 1384, 624, 1686 | Alkyl C-H, Methacrylate, Amide | 1 |
| copper oxide nanoparticles | 1384, 624, 1317 | Alkyl C-H, Methacrylate, Acetate | 1 |
| silver nanoparticles | 1384, 1636, 1631 | Alkyl C-H, Methacrylate, Acetate | 1 |
| hydrogel | 1384, 1632, 1062 | Amide, Methacrylate, Acetate | 1 |
| poly(vinyl alcohol) | 1384, 1700, 2993 | Acetate, Methacrylate, Alkyl C-H | 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 1384 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
-
tillid 1,0
“In addition, The crystal structures of the nanocomposites were determined cm(cid:3)1 the bands at 454, 556 and 603 by a Rigaku X-ray diffractometer (XRD) using Cu Ka radiation at could be related to strontium (cid:2) ferritecharacteristicpe”
Evaluation of microwave and magnetic properties of substituted SrFe12O19 and substituted SrFe12O19/multi-walled carbon nanotubes nanocomposites DOI: 10.1016/j.matchemphys.2013.08.045 -
N-O bond tillid 1,0
“In both cases, peaks around cm-1 1384 were observed, which is characteristic of N O and N O stretching of NO 3.”
Antimycotic nail polish based on humic acid‐coated silver nanoparticles for onychomycosis DOI: 10.1002/jctb.6676 -
Carboxyl (COOH) tillid 1,0
“J.Fontetal./AnalyticaChimicaActa598(2007)119-127 123 1384cm-1 pressed on a diamond cell and measurements were taken on one bands are due to carboxylic acids.”
Font 等 - 2007 - Fourier transform infrared spectroscopy as a suita DOI: 10.1016/j.aca.2007.07.021 -
tillid 1,0
“The insertion of fertilizer into hydrogel matrix was sharpen the peaks of hydrogel moieties and led cm-1 to new peak appearance at 1384 (NO moieties), correspond to the interaction with zinc ions.”
Hendrawanh 等 - 2019 - Poly (vinyl alcohol)glutaraldehydePremna oblongi DOI: 10.1088/1757-899X/509/1/012048 -
Acetate tillid 1,0
“The band at 1384 was bond.20 Absorption at ascribed to the C=O planes, respectively, of the tenorite structure of cm(cid:2)1 cm(cid:2)1 and 3478 was ascribed to H-O-H 1623 CuO.”
Kayani 等 - 2015 - Characterization of Copper Oxide Nanoparticles Fab DOI: 10.1007/s11664-015-3867-5 -
N-O bond tillid 1,0
“The next 182 3cm-1 band at 1384 is due to the oscillation in NO groups of the residual La(III) salts 183”
Synthesis of lanthanum tungstate interconnecting nanoparticles by high voltage electrospinning DOI: 10.1016/j.apsusc.2015.05.194 -
Amide tillid 1,0
“Spectral features like very good classification between normal and malignant spectra cm(cid:1)1 broader amide I, and peaks at 1384, 1269, 939 and 854 was observed as shown in Fig.”
Krishna 等 - 2006 - Raman spectroscopy studies for diagnosis of cancer DOI: 10.1016/j.vibspec.2006.01.011 -
Carboxyl (COOH) tillid 1,0
“The negative peak around 1384 corresponding to symmetric carboxylic vibrations, also”
Alteration of Sugar-Induced Conformational Changes of the Melibiose Permease by Mutating Arg141 in Loop 4-5 DOI: 10.1016/j.bpj.2009.03.025
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