Hvad absorberer ved 1065 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1065 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 1065 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 |
|---|---|---|---|
| Methacrylate | 17 | 17 | 1,0 |
| Acetate | 17 | 17 | 1,0 |
| C-O single bond | 17 | 16 | 1,0 |
| Methoxy (OCH3) | 16 | 16 | 1,0 |
| Phosphate (PO4) | 6 | 6 | 1,0 |
| Siloxane (Si-O-Si) | 5 | 5 | 1,0 |
| Alkyl C-H | 4 | 4 | 1,0 |
| Amide | 4 | 4 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Silicon-oxygen (Si-O) | 3 | 3 | 1,0 |
| Silicon (Si) | 3 | 3 | 1,0 |
| Carboxyl (COOH) | 3 | 3 | 1,0 |
| Ring structure | 2 | 2 | 1,0 |
| Carbohydrate | 2 | 2 | 1,0 |
| Lignin | 2 | 2 | 1,0 |
| N h | 2 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| Ketone | 2 | 2 | 1,0 |
| Ester | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 2 | 2 | 1,0 |
| C=n | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| Urea | 1 | 1 | 1,0 |
| Nucleic acid | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Chlorine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amino acid | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Sulfonate | 1 | 1 | 0,95 |
Rangering afspejler akkumuleret litteraturevidence, ikke en enkelt fast regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| cellulose | 1065, 1735, 1650 | Acetate, Methacrylate, C-O single bond | 1 |
| hemicellulose | 1065, 1730, 897 | Methacrylate, Acetate, C-O single bond | 1 |
| silver nanoparticles | 1065, 1636, 1631 | Methacrylate, Acetate, C-O single bond | 1 |
| lignin | 1065, 1035, 1510 | Methacrylate, Acetate, C-O single bond | 1 |
| lipids | 1065, 1735, 810 | Methacrylate, Acetate, Methoxy (OCH3) | 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 1065 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
-
Alkyl C-H tillid 1,0
“between 1065 and 1123 Interestingly, the C-H bending of MC exhibits distinct small between 1065 and1123 cm-1.”
Aziz 等 - 2022 - The Study of Ion Transport Parameters in MC-Based DOI: 10.3390/membranes12020139 -
Alkyl C-H tillid 1,0
“cm-1 (out of plane), at 1465.9 is C-H in plane bending (scissoring), at 2885 is C-H stretching cm-1 cm-1 (symmetric), and at 1064.71 and also 1111 are stretching ether C-O from -CH 2-OH group in PEG-4000 [12, 19].”
Deswardani 等 - 2017 - Study of Structural and Magnetic Properties of Sil DOI: 10.1088/1757-899X/202/1/012047 -
Amide tillid 1,0
“*** II/COO(cid:3) Amide stretching 1188.83±0.08 1195.40±0.05 0.466±0.025 0.324±0.011 *** *** II/COO(cid:3) Amide stretching 1137.97±0.14 1141.26±0.12 0.649±0.012 0.275±0.010 II/COO(cid:3) Amide stretching 1065.34±0.23 1.084±0.012”
Differentiation in MALDI-TOF MS and FTIR spectra between two pathovars of Xanthomonas oryzae DOI: 10.1016/j.saa.2014.06.056 -
Acetate tillid 1,0
“Complexation was cm-1, cm-1, cm-1, cm-1 C-O-C, observed with the changes of peaks at 1065 1598 2912 and 3396 that corresponds to C=O of COOstretching,C-Hstretching,andO-Hstretching,respectively,ofCMC/PVAblendsystemupontheadditionofNH 4Cl.Th”
An investigation on the abnormal trend of the conductivity properties of CMC/PVA-doped NH4Cl-based solid biopolymer electrolyte system DOI: 10.1007/s11581-018-2734-9 -
Acetate tillid 1,0
“For the carboxymethyl kappa carrageenan, it was also cm-1, observed that the peak at 1065 and 1041 which represented the C-O-C stretching,”
Mobarak 等 - 2015 - Carboxymethyl Carrageenan Based Biopolymer Electro DOI: 10.1016/j.electacta.2015.02.200 -
Water (H2O) tillid 1,0
“These peaks cm-1, 1065 and 1057 which were assigned to the presence of indicated the capability of CNFs to absorb water.”
Nanostructural, Chemical, and Thermal Changes of Oil Palm Empty Fruit Bunch Cellulose Nanofibers Pretreated with Different Solvent Extractions DOI: 10.1007/s12649-017-0098-4 -
Acetate tillid 1,0
“Choline stretch 1172 1060 C-O stretch COH stretch C-O stretch of 1065 1092”
Prediction of Neonatal Respiratory Distress Biomarker Concentration by Application of Machine Learning to Mid-Infrared Spectra DOI: 10.3390/s22051744 -
Acetate tillid 1,0
“cm-1 A band at 1065 has also emerged because of the C-O bond stretching in amino acid [22,39].”
Aziz 等 - 2019 - Fabrication of Interconnected Plasmonic Spherical DOI: 10.3390/nano9111557
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