Hvad absorberer ved 1066 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1066 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 1066 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 | 15 | 14 | 1,0 |
| Methoxy (OCH3) | 14 | 13 | 1,0 |
| Methacrylate | 14 | 13 | 1,0 |
| Acetate | 14 | 13 | 1,0 |
| Siloxane (Si-O-Si) | 3 | 3 | 1,0 |
| Secondary amine | 3 | 3 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Alkyl C-H | 2 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Nucleic acid | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Bromine | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
| Nitrogen heterocycle | 1 | 1 | 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 |
|---|---|---|---|
| TiO2 | 1066, 1700, 1093 | 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 1066 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
-
Nitrogen heterocycle tillid 1,0
“This downshift value was the same as cm-1 Metal complexes with histidine ligands have been reported those of the 1111/1102 and 1094 bands observed in Fe2+/Fe3+ cm-1 to exhibit characteristic FTIR signals of the imidazole ring the spectrum o”
Noguchi 等 - 1999 - Structure of a histidine ligand in the photosynthe DOI: 10.1021/bi990631 -
Acetate tillid 1,0
“The medium/wide band at 468 observed at 1066 and 1032 cm-1 were ascribed to C-O-C (in β-glucosidic linkage), C 3-OH, was attributed to the out-of-plane bending mode (C-C-N) [29]).”
Mesoporous Magnetic Cysteine Functionalized Chitosan Nanocomposite for Selective Uranyl Ions Sorption: Experimental, Structural Characterization, and Mechanistic Studies DOI: 10.3390/polym14132568 -
Bromine tillid 1,0
“the increase of the volume of the SI-GO dispersion, the initiator vibration is seen at 1066 and 1022 The CBr stretching s-and-conditions) cm-1 becomes inefficient and the possibility of polymer crosslinking vibration of the unreacted initi”
Aliyev 等 - 2020 - SI-ATRP Polymer-Functionalized Graphene Oxide for DOI: 10.1002/admi.202000443. -
Acetate tillid 1,0
“The bending oscillation of the C-H group in the aldehydes was disclosed by the band at 1305 whereas the C-O pulling oscillations of the cm-1, hydes was disclosed by the band at 1305 cm-1, whereas the C-O pulling oscillations of the ether an”
Green Synthesis of TiO2 Nanoparticles Using Acorus calamus Leaf Extract and Evaluating Its Photocatalytic and In Vitro Antimicrobial Activity DOI: 10.3390/catal12020181 -
C-O single bond tillid 1,0
“The hydroxyl band observed for the pure MC can be ascribed to the wavenumber region 3447-3458 cm-1, though the ether band needs to be at 1066”
Synthesis of Polymer Nanocomposites Based on [Methyl Cellulose](1-x):(CuS)x (0.02 M x 0.08 M) with Desired Optical Band Gaps DOI: 10.3390/polym9060194 -
Silicon (Si) tillid 1,0
“700 while the Si crystal is transparent to 1200 in Figure 2B and nicely illustrate the material and number of cm-1, cm-1 cm-1 Bands at 1447 1385 and 1296 are associated active bounces dependent depth of penetration: While the silicon.34 cm-”
Baumgartner 等 - 2020 - 3D Printing for Low-Cost and Versatile Attenuated DOI: 10.1021/acs.analchem.9b04043 -
Alkyl C-H tillid 1,0
“At cm-1 pH 3 the band centred at 1066 which includes the CH vibration, showed a higher intensity 3 compared to that observed at pH 9 where the band shifted and centred with a lower intensity at cm-1 964 (Fig.”
Belhadj 等 - 2016 - Pathways of the photocatalytic reaction of acetate DOI: 10.1016/j.jcat.2016.08.006 -
Acetate tillid 1,0
“A weaker amino characteristic peak at 1255 is associated cm-1 is associated with O-H bending vibration and the peak at 1066 cm-1 is assigned to C-O cm´1 with O-H bending vibration and the peak at 1066 is assigned to C-O stretching.”
Preparation and Characterization of Polyvinyl Alcohol-Chitosan Composite Films Reinforced with Cellulose Nanofiber DOI: 10.3390/ma9080644
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