Hvad absorberer ved 1153 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1153 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 1153 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 | 19 | 15 | 1,0 |
| Methacrylate | 17 | 15 | 1,0 |
| Acetate | 17 | 15 | 1,0 |
| Methoxy (OCH3) | 16 | 14 | 1,0 |
| Carbohydrate | 7 | 7 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Carboxyl (COOH) | 3 | 3 | 1,0 |
| Alkyl C-H | 3 | 2 | 1,0 |
| Amide | 3 | 2 | 1,0 |
| Hydrogen bond | 2 | 2 | 1,0 |
| Ring structure | 2 | 2 | 1,0 |
| Ketone | 2 | 2 | 1,0 |
| Ester | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 2 | 2 | 1,0 |
| Nucleic acid | 2 | 2 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| N h | 2 | 1 | 1,0 |
| S eq o | 1 | 1 | 1,0 |
| Amine primary | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 0,7 |
| Amino acid | 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 |
|---|---|---|---|
| chitosan | 1153, 1650, 1655 | Acetate, Methacrylate, C-O single bond | 2 |
| PVA | 1153, 1660, 2930 | Acetate, Methacrylate, C-O single bond | 1 |
| cellulose | 1153, 1735, 1650 | Acetate, Methacrylate, C-O single bond | 1 |
| starch | 1153, 1650, 1540 | Methacrylate, Acetate, C-O single bond | 1 |
| glycerol | 1153, 1585, 1630 | Methacrylate, Acetate, C-O single bond | 1 |
| cotton | 1153, 1030, 1638 | 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 1153 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
-
Carboxyl (COOH) tillid 1,0
“Both PU and PTR 1742cm(cid:3)1 1168cm(cid:3)1 cm(cid:3)1 cm(cid:3)1 acid at and which could be clearly observed showed a peak at 1153 which was about 13 different 1742cm(cid:3)1 in OL but not in others.”
Differential identification of mushrooms sclerotia by IR macro-fingerprint method DOI: 10.1016/j.saa.2015.07.054 -
Silicon-oxygen (Si-O) tillid 1,0
“1153cm-1 950cm-1 effects and corresponding to main absorption bands of quartz (Figs.”
FTIR photoacoustic spectroscopy for identification and assessment of soil components_ Chernozems and their size fractions DOI: 10.1016/j.pacs.2020.100162 -
C-O single bond tillid 1,0
“The peaks displayed at around 1153 cm-1 β and 1082 were attributed to the (1-4) glycosidic bond in the polysaccharide unit and the stretching vibrations of C-O-C in the glucose ring, respectively.”
Antimicrobial Activity of Chemically and Biologically Treated Chitosan Prepared from Black Soldier Fly (Hermetia illucens) Pupal Shell Waste DOI: 10.3390/microorganisms9122417 -
C c single bond tillid 1,0
“The 1153 band is ascribed to C-C ring asymmetric stretching cm-1 bands are due to C-O-C glycosidic link vibrations while the 1121 and 1094”
Adebajo 等 - 2006 - Raman spectroscopic investigation of acetylation o DOI: 10.1016/j.saa.2005.07.045 -
Acetate tillid 1,0
“The dotted blue lines crossing the peak at ~1153 is for asymmetric cm-1 stretch of C-O-C, and that at 1298 is for the C-N stretching vibration of type I amine.”
Awadallah-F 和 Al-Muhtaseb - 2019 - Influence of Chitosan Addition on Resorcinol-Forma DOI: 10.3390/app9214582 -
Acetate tillid 1,0
“The local peak at 1153 was assigned mostly to C-O-C asymmetric stretch vibrations, which are characteristic of various cell wall cm-1 polysaccharides and therefore are not distinctive.”
Bednarek 等 - 2020 - Exploring the Biochemical Origin of DNA Sequence V DOI: 10.3390/ijms21165770 -
Acetate tillid 1,0
“Furthermore, all curves showed absorption peaks at 1153 cm-1, attributed to the asymmetric stretch vibration of the bridge bond C-O-C.”
Pullulan Oxidation in the Presence of Hydrogen Peroxide and N-Hydroxyphthalimide DOI: 10.3390/ma15176086 -
C c single bond tillid 1,0
“Bands located from 920 cm-1 to 1153 cm-1 are associated with vibrations of C-C and C-O-H stretching and the bending mode of C-H bonds typical of vibrations of C-C and C-O-H stretching and the bending mode of C-H bonds typical of vibrations”
Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites DOI: 10.3390/molecules26216734
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