Hvad absorberer ved 1016 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1016 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 1016 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 |
|---|---|---|---|
| C-O single bond | 11 | 11 | 1,0 |
| Methoxy (OCH3) | 9 | 9 | 1,0 |
| Methacrylate | 9 | 9 | 1,0 |
| Acetate | 9 | 9 | 1,0 |
| Hydroxyl (O-H) | 5 | 4 | 1,0 |
| Carbohydrate | 3 | 3 | 1,0 |
| Amide | 3 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1,0 |
| Silanol (Si-OH) | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Phosphorus | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| N c o | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Nucleic acid | 1 | 1 | 1,0 |
| C=n | 1 | 1 | 0,9 |
| Silicon (Si) | 1 | 1 | 0,7 |
| N-O bond | 1 | 0 | 1,0 |
| Secondary amine | 1 | 0 | 1,0 |
| C n single 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 |
|---|---|---|---|
| citric acid | 1016, 1725, 1732 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| chitosan | 1016, 1650, 1655 | Acetate, Methacrylate, C-O single bond | 1 |
| chitin | 1016, 1650, 1655 | 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 1016 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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Carbohydrate tillid 1,0
“cm-1 As seen in previous publications, transmission elecThe IR bands at 1016 (11) on behalf of tron microscopy (TEM) images of Agsbox showed a cellulose and hemicellulose changed after Agsbox cm-1 'bunch of grapes' cluster of Ag nanoparticl”
Physical, biological and chemical characterisation of wood treated with silver nanoparticles DOI: 10.1007/s10570-019-02416-x -
Nucleic acid tillid 1,0
“It can be seen ure 6 that the characteristic spectral feature of Z-DNA remained, which essentially resemin Figure 6 that the characteristic spectral feature of Z-DNA remained, which essentially bles that of the pure GC-DNA, having the Z-DNA”
Assessing B-Z DNA Transitions in Solutions via Infrared Spectroscopy DOI: 10.3390/biom13060964 -
Carboxyl (COOH) tillid 1,0
“FT-IR analysis showed that extruded samples with citric acid caused starch hydrolysis, resulted an increase in the intensity of bands 994 and 1016 cm-1 in comparison to native corn starch (NCS).”
Optimization of an extrusion cooking process to increase formation of resistant starch from corn starch with addition of citric acid DOI: 10.1002/star.201900150. -
Acetate tillid 1,0
“Characteristic peaks of O-H cm-1, cm-1 stretching at 3423 C-H stretching of the CH groups at 2920 and C-O-C stretching at 2 cm-1 1016 were detected as well (Figure 2B), which are in accordance with the previous results”
Niaz 等 - 2020 - Alginate-caseinate based pH-responsive nano-coacer DOI: 10.1016/j.ijbiomac.2019.11.177 -
Hydroxyl (O-H) tillid 1,0
“The peak at 1016 was ascribed to the phenolic were washed with 10 mL of distilled water.”
Characterization of the medium infrared spectra of polyphenols of red and white wines by integrating FT IR and UV–Vis spectral data DOI: 10.1016/j.lwt.2021.111604 -
Acetate tillid 1,0
“The FTIR analysis confirmed the presence of NH out of plane bending (872 cm-1) cm-1) and C-O-C stretching (1016 for chitosan with 59.76% degree of deacetylation.”
Sudatta 等 - 2020 - Extraction, characterization and antimicrobial act DOI: 10.1016/j.ijbiomac.2020.06.291 -
Acetate tillid 1,0
“In detail, the peaks at 992 and 1040 are related to crystalline modes, while signals at 1076, 1040, 1016, 992 and 926 cm-1 are due to C-O-H bending and cm-1 domains, while the peak at 1016 is related to the amorphous regions [30,31,33].”
Bugnotti 等 - 2023 - Structure of Starch-Sepiolite Bio-Nanocomposites DOI: 10.3390/polym15051207 -
N c o tillid 1,0
“cm-1 Meanwhile, the band at 1106 corresponding to the N-C-O stretching vibration of is shifted to a lower cm-1, cm-1 wavenumber of 1016 and 1641 is the absorption”
Cheng 等 - 2022 - Development of a High-Strength and Adhesive Polyac DOI: 10.1021/acsomega.1c06626
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