What absorbs at 1223 cm⁻¹ in an FTIR spectrum?
A band near 1223 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
Greitas atsakymas
A band near 1223 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.
Galimi funkcinių grupių priskyrimai
| Funkcinė grupė | Pagrindžiantys faktai | Cituoti šaltiniai | Aukščiausias pasitikėjimas |
|---|---|---|---|
| Methoxy (OCH3) | 6 | 6 | 1,0 |
| Methacrylate | 6 | 6 | 1,0 |
| C-O single bond | 6 | 6 | 1,0 |
| Acetate | 6 | 6 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
Reitingavimas atspindi sukauptą literatūros įrodymų kiekį, o ne vieną autoritetingą taisyklę. Visada patvirtinkite pagal savo mėginio kontekstą.
Spektro logika
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 1223 cm⁻¹ is usually not enough for material identification by itself.
Realus naudojimas
Šis užklausų tipas yra įprastas polimerų identifikavime, nežinomų plastikų atrankinėje analizėje, kokybės kontrolės gedimų šalinime, perdirbtų medžiagų patikroje ir literatūra pagrįstoje smailių priskyrimo peržiūroje.
Dažnos klaidos
- Vieną izoliuotą juostą laikant medžiagos įrodymu, nepatikrinus bent vienos ar dviejų patvirtinančių smailių.
- Ignoruojamas persidengimas: kelios funkcinės grupės gali prisidėti prie to paties bangos skaičiaus.
- Praleidžiant patvirtinimą, kai priedai, mišiniai, oksidacija ar užteršimas gali iškraipyti spektrą.
Patikros patarimas
Kai išlieka neaiškumų, patvirtinkite hipotezę naudodami DSC, GC-MS arba TGA, ypač mišiniams, suirusiems mėginiams ir užpildytiems polimerams.
Literatūra, kuria remiantis atlikti šie priskyrimai
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Aromatic ring pasitikėjimas 1,0
“cm-1, 2950 to 2840 the aromatic ring CH band at cm-1, cm-1 1223 and a peak near 490 (Fig.”
Calderon 等 - 2011 - Chemical Differences in Soil Organic Matter Fracti DOI: 10.2136/sssaj2009.0375 -
Acetate pasitikėjimas 1,0
“The 1223 band was assigned to C-O vibrations.”
Can 等 - 2023 - Choline Chloride-Based Deep Eutectic Solvent-Treat DOI: 10.3390/f14030569 -
N-O bond pasitikėjimas 1,0
“3 here) The IR spectrum of original sPS film showed that there is no absorption at 1223 cm-1 which is one of the characteristic trans planar conformation bands of mesophase.”
Investigation on the overlapping bands of sydiotactic polystyrene by using 2D-IR spectroscopy DOI: 10.1016/j.molstruc.2016.03.103 -
Acetate pasitikėjimas 1,0
“Addition it is observed by an increase of intensity of and 1223cm-1, C-O of 6% pMDI resulted in less weight less than the addition of respectively, by absorptions at 1700 and 2% pMDI and 4% pMDI, in the temperature range between increasing”
El-Shekeil 等 - 2012 - Effect of pMDI isocyanate additive on mechanical a DOI: 10.1177/0021998310385030) -
Acetate pasitikėjimas 1,0
“C=O bending in carboxylic esters and the band at 1223 In particular, silver does exist in nature especially in leadascribable to C-O stretching in carboxylic esters (Bonizzoni based ores, so that its production as pure metal required cuet a”
The combined use of SEM-EDX, Raman, ATR-FTIR and visible reflectance techniques for the characterisation of Roman wall painting pigments from Monte d’Oro area (Rome): an insight into red, yellow and pink shades DOI: 10.1007/s11356-021-15085-w -
Acetate pasitikėjimas 1,0
“cm-1 Furthermore, PC1 was also negatively correlated with the regions at 2929 and 2854 (Ccm-1 H of aliphatic methylene), 1223 (C-O stretching and CH deformation in polysaccharides and lignin, N-H rocking and C-O stretching in amino acids, A”
Huang 等 - 2021 - Prediction of biochemical methane potential of urb DOI: 10.1016/j.scitotenv.2021.147959 -
Hydroxyl (O-H) pasitikėjimas 1,0
“The peaks between ( cm-1 e 1222.87 and 1145.72 confirmed -OH functional 0.25 c n group of adsorbed moisture and peaks between 1078.21”
Synthesis, characterization and application of novel 1, 3-bis[(furan-2-l)methylene]thiourea functional dye on wool and cotton fabrics DOI: 10.1007/s42452-020-03653-7 -
Acetate pasitikėjimas 1,0
“Additionally, a strong and intense band given by the cm-1 phenolic C-O stretching between 1223 and 1208 was detected [5,24-28,30].”
What about Phenol Formaldehyde (PF) Foam in Modern-Contemporary Art? Insights into the Unaged and Naturally Aged Material by a Multi-Analytical Approach DOI: 10.3390/polym13121964
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