Hvad absorberer ved 1379 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1379 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 1379 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 | 12 | 12 | 1,0 |
| Methoxy (OCH3) | 11 | 9 | 1,0 |
| Methacrylate | 10 | 8 | 1,0 |
| C-O single bond | 10 | 8 | 1,0 |
| Acetate | 10 | 8 | 1,0 |
| Hydroxyl (O-H) | 6 | 6 | 1,0 |
| Methyl | 4 | 4 | 1,0 |
| Secondary amine | 4 | 3 | 1,0 |
| Amide | 4 | 3 | 1,0 |
| C n single bond | 3 | 2 | 1,0 |
| N h | 2 | 2 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Nitrogen heterocycle | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Amino acid | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Nitrate | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 0,8 |
Rangering afspejler akkumuleret litteraturevidence, ikke en enkelt fast regel. Bekræft altid mod din prøvekontekst.
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 1379 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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N h tillid 1,0
“It isevidentthatseveralcharacteristicabsorptionbandsat3202(NH stretching), 3098, 2928, 2871 (CH stretching), 2845, 1699 (C O stretchingcyclic),1678,1492,1452(CHbending),1420,1379,1330 cm-1 were observed in the IR spectra of and 1273 (CN str”
Hsu 和 Lin - 2009 - Rapid examination of the kinetic process of intram DOI: 10.1016/j.tca.2008.12.008 -
C-O single bond tillid 1,0
“[24], this peak at the near region (1520-1500 cm-1) could be derived from any other aromatic or phenolic compounds due to C = C stretching of aromatic rings, with contributions at 1379 cm-1 which may be due to overlapping C-OH deformation o”
Specific Mycoparasite-Fusarium Graminearum Molecular Signatures in Germinating Seeds Disabled Fusarium Head Blight Pathogen’s Infection DOI: 10.3390/ijms22052461 -
Acetate tillid 1,0
“We suggest that the relative peak area of the bandwith cm-1 change of the intensity of C-O-C band as function of peaks at 1379 and 1371 cannot represents the exact (1-3 concentration.”
Studies of the behavior of reverse nonionic surfactant Pluronic 31R1 in aqueous and Propylammonium acetate (PAAc) ionic liquid solutions DOI: 10.1007/s10965-020-02315-x -
Amide tillid 1,0
“Strong peak at 1379 may refer to C-N stretching amine due to the M”
Cytotoxicity and antibacterial activities of plant-mediated synthesized zinc oxide (ZnO) nanoparticles using Punica granatum (pomegranate) fruit peels extract DOI: 10.1016/j.molstruc.2019.04.026 -
Acetate tillid 1,0
“If deprotonation occurs during DES-BA coamorphous salt formation, the carboxylic anion (-COO-) has only a single stretch (C-O) at 1379.16 cm-1.”
A Novel Desloratadine-Benzoic Acid Co-Amorphous Solid: Preparation, Characterization, and Stability Evaluation DOI: 10.3390/pharmaceutics10030085 -
Acetate tillid 1,0
“Figure 4c shows areas of these cm-1 C-H peaks of adsorbed n-pentane integrated within 3000-2820 for each spectrum Nanomaterials 2023, 13, x FOR PEER REVIEW 8 of 18 can see in Figure S4b the peaks at 1460 and 1379 cm-1, which correspond to t”
Sorption and Desorption of Vapor of n-Pentane by Porphyrin Aluminum Metal–Organic Framework: Mechanism of Bonding, Kinetics and Stoichiometry by Complementary In-Situ Time-Dependent and Ex-Situ Methods DOI: 10.3390/nano13091529 -
Alkyl C-H tillid 1,0
“In this sample, Alkyl group is represented by Bhasmas a tool to differentiate the prepared by different four peaks raised due to C-H stretching vibrations at 1379.25, techniques.”
Chaudhari 等 - 2015 - Fourier transform infrared analysis of Tamra Bhasm DOI: 10.4103/0974-8520.169013 -
Alkyl C-H tillid 1,0
“The bands at 1452 1379 cm-1 and 760 can be attributed to the bending vibrations of the C-H bonds.”
Chylinski 等 - 2022 - Effectiveness of Curing Compounds for Concrete DOI: 10.3390/ma15072699
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