Hvad absorberer ved 1031 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1031 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 1031 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 | 27 | 26 | 1,0 |
| Methacrylate | 24 | 23 | 1,0 |
| Acetate | 24 | 23 | 1,0 |
| Methoxy (OCH3) | 23 | 22 | 1,0 |
| Hydroxyl (O-H) | 9 | 9 | 1,0 |
| Carbohydrate | 9 | 9 | 1,0 |
| Silicon-oxygen (Si-O) | 7 | 6 | 1,0 |
| Amide | 6 | 6 | 1,0 |
| Carboxyl (COOH) | 4 | 4 | 1,0 |
| Carbonyl (C=O) | 4 | 4 | 1,0 |
| Silicon (Si) | 3 | 3 | 1,0 |
| Ester | 3 | 3 | 1,0 |
| Secondary amine | 3 | 3 | 1,0 |
| C n single bond | 3 | 3 | 1,0 |
| Alkyl C-H | 3 | 3 | 1,0 |
| S eq o | 3 | 3 | 1,0 |
| Alkene (C=C) | 2 | 2 | 1,0 |
| Nucleic acid | 2 | 2 | 1,0 |
| Ketone | 2 | 2 | 1,0 |
| Ring structure | 2 | 2 | 1,0 |
| N h | 2 | 2 | 1,0 |
| Chitosan | 1 | 1 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| Lipid | 1 | 1 | 1,0 |
| Protein | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Thiol | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Chlorine | 1 | 1 | 1,0 |
| Amine primary | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Sulfonate | 1 | 1 | 0,8 |
| Silicate | 1 | 1 | 0,8 |
Rangering afspejler akkumuleret litteraturevidence, ikke en enkelt fast regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| MWCNT | 1031, 2876, 1430 | C-O single bond, Methoxy (OCH3), Methacrylate | 1 |
| nanocellulose | 1031, 1540, 1646 | Methacrylate, Acetate, C-O single bond | 1 |
| saliva | 1031, 1648, 1664 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| blood | 1031, 2965, 1117 | Methacrylate, Acetate, C-O single bond | 1 |
| Silver nanoparticles | 1031, 1636, 1631 | 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 1031 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
“A peak 1031 which has been assigned to a combination of C-H in-plane ring bending and the five-membered ring deformation which contains the C=C-N deformation.”
Highly Biological Active Antibiofilm, Anticancer and Osteoblast Adhesion Efficacy from MWCNT/PPy/Pd nanocomposite DOI: 10.1016/j.apsusc.2017.10.142 -
C-O single bond tillid 1,0
“asymmetric O-C-C stretch ester: 1031.2 stretch: 1054.2 mucus.”
Elkins - 2011 - Rapid Presumptive Fingerprinting of Body Fluids DOI: 10.1111/j.1556-4029.2011.01870.x -
Phosphate (PO4) tillid 1,0
“At 24 h (Figure 5A), in all thicknesses, nesses, the behavior is similar: a peak corresponding to the presence of OH bonds, folthe behavior is similar: a peak corresponding to the presence of OH bonds, followed cm-1, lowed by a peak corresp”
Remineralization Potential of Three Restorative Glass Ionomer Cements: An In Vitro Study DOI: 10.3390/jcm12062434 -
Carbonyl (C=O) tillid 1,0
“An intense peak cm-1 appeared at 1031 with the incorporation of CNC into Tylose MH 50 film, which is cmassigned to CO stretching (carbonyl groups) (Figure 2D).”
Mustary 等 - 2023 - Synthesis and Characterization of Biocomposite Fil DOI: 10.33263/BRIAC133.274 -
Amine primary tillid 1,0
“3650-3250cm-1 cm-1 cm-1 cm-1 1010.16 and 922.53 ±1050 (Medium) -COOH (C-O Stretching) -NH2 (N-HStretching) (Medium) 1638.22cm-1 1650-1590cm-1 -NH2 (N-HBending) (Medium) cm-1 cm-1 3650-3250 (Medium) -NH2 (N-H Stretching) 3445.97 1030.64cm-1”
Validation of the Developed Zero-Order Infrared Spectrophotometry Method for Qualitative and Quantitative Analyses of Tranexamic Acid in Marketed Tablets DOI: 10.3390/molecules26226985 -
N h tillid 1,0
“The peak at 1229 S@O was identified as sulfones, sulfonyl chlorides, sulfates, sulfoncm(cid:1)1 CAN amides, peak at 1031 corresponds to amines, and the cm(cid:1)1 CAH peaks at 979 and 758 were assigned to out of plane”
Green synthesis of Silver nanoparticles using Streptomyces hirsutus strain SNPGA-8 and their characterization, antimicrobial activity, and anticancer activity against human lung carcinoma cell line A549 DOI: 10.1016/j.sjbs.2021.08.084 -
Amide tillid 1,0
“Besides, the characteristic peak at cm-1 1031.37 is assigned to the asymmetric stretching vibration of C-N-C of the oxazine ring, which emerges from an important band of overlapped peaks due to C-O stretching and O-H in plane deformation of”
Tan 等 - 2018 - Synthesis and Characterization of Polybenzoxazine DOI: 10.1063/1.5066866 -
C-O single bond tillid 1,0
“The C-O-C stretch appears at 1031 The stretch appears at 1031 while the 42 cm-1 peaks at 892, 771 and 643 were attributed to the polymer backbone bending.”
Zaman 等 - 2018 - Synthesis of thiolated arabinoxylan and its applic DOI: 10.1088/1748-605X/aa9d69
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