What absorbs at 1203 cm⁻¹ in an FTIR spectrum?
A band near 1203 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
Hurtigt svar
A band near 1203 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| C-O single bond | 8 | 7 | 1,0 |
| Hydroxyl (O-H) | 6 | 6 | 1,0 |
| Methoxy (OCH3) | 6 | 5 | 1,0 |
| Methacrylate | 6 | 5 | 1,0 |
| Acetate | 6 | 5 | 1,0 |
| Alkyl C-H | 3 | 3 | 1,0 |
| Phosphate (PO4) | 3 | 2 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Phosphorus | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| chitosan | 1203, 1650, 1655 | Methacrylate, Hydroxyl (O-H), C-O single bond | 1 |
| Cellulose | 1203, 1735, 1650 | Methacrylate, C-O single bond, Hydroxyl (O-H) | 1 |
| GO | 1203, 1720, 1182 | Methacrylate, Hydroxyl (O-H), C-O single bond | 1 |
| RGO | 1203, 2358, 2930 | Methacrylate, Hydroxyl (O-H), C-O single bond | 1 |
Materialer vises kun, når den samme litteraturpulje understøtter dette bånd og mindst en yderligere karakteristisk top.
Spektrumlogik
This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 1203 cm⁻¹ is usually not enough for material identification by itself.
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
-
Carbohydrate tillid 1,0
“pennacea In addition, the band at 1203 is associated to oligo FTIR spectra of and corals and polysaccharide with C-O-C, C-O-P, P-O-P symsamples show the presence of chitin.”
Juarez-de la Rosa 等 - 2012 - Effects of thermal treatments on the structure of DOI: 10.1007/s10853-011-5878-9 -
Hydroxyl (O-H) tillid 1,0
“All the bands attributed to 1203cm-1 OH bending at 1455, 1336 and are reduced in inten1035cm-1, related to sity.”
Characterization of depolymerized residues from extremely low acid hydrolysis (ELA) of sugarcane bagasse cellulose: Effects of degree of polymerization, crystallinity and crystallite size on thermal decomposition DOI: 10.1016/j.indcrop.2011.11.009 -
Acetate tillid 1,0
“Moreover, the cm-1 peak at 1203 is due to the C-O-H vibrations.”
Reduced graphene oxide-intercalated graphene oxide nano-hybrid for enhanced photoelectrochemical water reduction DOI: 10.1007/s40097-019-00324-x -
Alkyl C-H tillid 1,0
“The non-polarized FTIR spectrum of the red class depicted an increased absorbance of β-sheet structures (amide I: 1697 and 1634 cm-1) and bands at 1338, 1283, 1238, and 1203 cm-1 attributed to the δ(CH2), δ(CH3), ν(C-N), and δ(N-H) absorpti”
Fourier Transform Infrared Polarization Contrast Imaging Recognizes Proteins Degradation in Lungs upon Metastasis from Breast Cancer DOI: 10.3390/cancers13020162 -
Acetate tillid 1,0
“Additional bands appear at 1203 and 3030 that refer to C-O-H bending and N-H stretching, respectively [15].”
Delgado-Mellado 等 - 2018 - Thermal stability of choline chloride deep eutecti DOI: 10.1016/j.molliq.2018.03.076 -
Phosphate (PO4) tillid 1,0
“The bands at 1203, 1128, 1095, and 880 recorded in FTIR spectra ascribed to the phosphate groups (P=O, -PO 2, -PO 3, and P-O-P, respectively) confirmed the successful cross-linking between CS, MC, and STMP.”
Application of Vibrational Spectroscopic Techniques in the Study of the Natural Polysaccharides and Their Cross-Linking Process DOI: 10.3390/ijms24032630 -
Hydrogen bond tillid 1,0
“The strong absorption of the OH groups linked by hydrogen bonds of the glycosidic ring and the absorption band at 1203 cm-1 suggests the existence cm-1, cm-1, bonds at 3407 -CH, and -CH stretching vibrations at 2901 and C=O and C-C 2 of sul”
Malyar 等 - 2023 - Microfibrillated Cellulose with a Lower Degree of DOI: 10.3390/polym15040904 -
C c single bond tillid 1,0
“C-H stretching vibration of methoxyl group 2926 C=C ring stretch (conjugated) in aromatic 1612 O-H bend of carboxylic acids 1444 C-C stretch in ketones 1342 C-C(O)-C stretch of esters 1203 cm-1 A strong band at 3404 was discovered and assig”
Nwosu 和 Amusat - 2021 - DOI: 10.4152/pea.2021390605
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