Hvad absorberer ved 1072 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1072 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 1072 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 | 13 | 13 | 1,0 |
| Methoxy (OCH3) | 11 | 11 | 1,0 |
| Methacrylate | 11 | 11 | 1,0 |
| Acetate | 11 | 11 | 1,0 |
| Alkyl C-H | 6 | 6 | 1,0 |
| Ring structure | 6 | 6 | 1,0 |
| Phosphate (PO4) | 4 | 4 | 1,0 |
| Silicon-oxygen (Si-O) | 4 | 4 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Alkene (C=C) | 2 | 2 | 1,0 |
| Phosphorus | 2 | 2 | 1,0 |
| Sulfate (SO4) | 2 | 2 | 1,0 |
| Siloxane (Si-O-Si) | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| Carbohydrate | 2 | 1 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| Nucleic acid | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| S eq o | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Silicon carbon | 1 | 1 | 1,0 |
| Ammonium | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Metal hydroxyl | 1 | 1 | 0,9 |
| Amine primary | 1 | 1 | 0,7 |
Rangering afspejler akkumuleret litteraturevidence, ikke en enkelt fast regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| polysaccharide | 1072, 1637, 1320 | Methacrylate, Acetate, C-O single bond | 1 |
| collagen | 1072, 1408, 1660 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| chitosan | 1072, 1650, 1655 | Acetate, Methacrylate, C-O single bond | 1 |
| polysaccharides | 1072, 1053, 1143 | Methacrylate, Acetate | 1 |
| silver nanoparticles | 1072, 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 1072 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
-
Ring structure tillid 1,0
“The bands at 1072, water and polymer chains in polysaccharides as reported by cm-1 1128 and 1110 were due to the mannopyranose ring Bothara and Singh, (2012).”
Evaluation of the effect of soluble polysaccharides of palm kernel cake as a potential prebiotic on the growth of probiotics DOI: 10.1007/s13205-018-1362-4 -
Amide tillid 1,0
“Common cm-1 In these spectra, AH has much stronger peaks in 1241 and cm-1) (1643-1638 characteristic peaks of amide I and amide II 1072cm-1.”
Integral characterization of normal and alopecic hair at different degeneration stages by in-situ visible and chemical imaging DOI: 10.1016/j.saa.2020.118315 -
Acetate tillid 1,0
“According to Scheme 1, the increase in the absorbance of the IR band at 1032 cm-1 and modes of the CH bond [31,32] or C-O stretching, C-C stretching, C-C bending and N-N2 1072 cm-1 is a result of the appearance of new C-O bonds in the photo”
Degradation of Losartan Potassium Highlighted by Correlated Studies of Photoluminescence, Infrared Absorption Spectroscopy and Dielectric Spectroscopy DOI: 10.3390/pharmaceutics14112419 -
Acetate tillid 1,0
“The band at 1072 is attributed to C-O stretching vibrations and is characteristic of the glycerol component [76].”
Green Synthesis of Silver Nanoparticles for Preparation of Gelatin Films with Antimicrobial Activity DOI: 10.3390/polym14173453 -
Carbohydrate tillid 1,0
“LLM confirmed rule peak-group candidate”
Inorganic-organic polymer hybrid scaffold for tissue engineering-II: Partial enzymatic degradation of hydroxyapatite-chitosan hybrid DOI: 10.1163/156856202760319162 -
Ring structure tillid 1,0
“995-1012 C-S stretching 1072 1074 Ring stretching 1152”
Photodegradation of Azathioprine in the Presence of Sodium Thiosulfate DOI: 10.3390/ijms23073975 -
Alkyl C-H tillid 1,0
“cm-1 addition to the PCR-determined PG concentration profiles in cartilage, the 1338 band of collagen II (the CH2 wagging vibration of proline side chains [8, 10, 11]) and the 1072 cm-1 band of PG (the sugar groups [7, 8]) were also include”
Yin 等 - 2011 - Depth-dependent anisotropy of proteoglycan in arti DOI: 10.1016/j.vibspec.2011.08.005. -
Hydrogen bond tillid 1,0
“This absorption becomes weak and only one peak in the area of 1072.42 cm-1 (arrow 6) on chitosan beads due to the influence of the formation of hydrogen bonds from NH 3.”
Zam 等 - 2021 - Identification of chitosan beads from coconut crab DOI: 10.1088/1742-6596/1832/1/012014
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