What absorbs at 898 cm⁻¹ in an FTIR spectrum?
A band near 898 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
Schnelle Antwort
A band near 898 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.
Mögliche Funktionsgruppenzuweisungen
| Funktionelle Gruppe | Unterstützende Fakten | Zitierte Quellen | Höchstes Vertrauen |
|---|---|---|---|
| Carbohydrate | 15 | 15 | 1,0 |
| Acetate | 8 | 7 | 1,0 |
| Methoxy (OCH3) | 7 | 6 | 1,0 |
| Methacrylate | 7 | 6 | 1,0 |
| C-O single bond | 7 | 6 | 1,0 |
| Alkyl C-H | 5 | 5 | 1,0 |
| Secondary amine | 2 | 1 | 1,0 |
| C n single bond | 2 | 1 | 1,0 |
| Amide | 2 | 1 | 1,0 |
| Phosphate (PO4) | 2 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Oxygen heterocycle | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Metal oxo | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Chitosan | 1 | 1 | 0,7 |
| N h | 1 | 0 | 1,0 |
Das Ranking spiegelt die gesammelte Literatur Evidenz wider, nicht eine einzelne maßgebliche Regel. Bestätigen Sie immer anhand Ihres Probenkontexts.
Mögliche Materialien
| Material | Unterstützende Peaks | Überlappende Gruppen | Zitierte Quellen |
|---|---|---|---|
| starch | 898, 1650, 1540 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| Cellulose | 898, 1735, 1650 | Acetate, Methacrylate, Methoxy (OCH3) | 1 |
| TiO2 | 898, 1700, 1093 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| lignin | 898, 1035, 1510 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| wood | 898, 1740, 1730 | Carbohydrate, Methacrylate, Acetate | 1 |
Materialien werden nur angezeigt, wenn derselbe Literaturpool diese Bande und mindestens einen weiteren charakteristischen Peak unterstützt.
Spektrumslogik
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 898 cm⁻¹ is usually not enough for material identification by itself.
Praktische Anwendung
Diese Art von Abfrage ist üblich bei der Polymeridentifikation, dem Screening unbekannter Kunststoffe, der Fehlersuche in der Qualitätskontrolle, der Verifizierung von Recyclingmaterial und der literaturgestützten Überprüfung der Peakzuordnung.
Häufige Fehler
- Behandlung einer isolierten Bande als Beweis für ein Material, ohne mindestens einen oder zwei unterstützende Peaks zu überprüfen.
- Überlappung ignorieren: Mehrere funktionelle Gruppen können nahe der gleichen Wellenzahl beitragen.
- Überspringen der Validierung, wenn Additive, Mischungen, Oxidation oder Verunreinigungen das Spektrum verfälschen können.
Beratung zur Verifizierung
Wenn weiterhin Mehrdeutigkeit besteht, validieren Sie die Hypothese mit DSC, GC-MS oder TGA, insbesondere bei Mischungen, degradierten Proben und gefüllten Polymeren.
Literatur hinter diesen Zuweisungen
-
Carbohydrate Vertrauen 1,0
“Both the control cellulose and CWG spectra showed In particular, the absorbance bands at around 898, 1,057, the corresponding signals for cellulose.”
Choi 等 - 2018 - Structural Characterization of Cellulose Obtained DOI: 10.3746/pnf.2018.23.2.166 -
Ring structure Vertrauen 1,0
“The C-C stretching at 1,059 cm-1 were the asymmetric out of phase ring stretching of cellulose at 898 β-glucosidic also detected and related to the linkages between the sugar”
Hajiha 等 - 2014 - Modification and Characterization of Hemp and Sisa DOI: 10.1080/15440478.2013.861779 -
Hydroxyl (O-H) Vertrauen 1,0
“The primary peaks at 3,353 and 2,898 cm-1 are assigned to O-H stretching and C-H stretching vibration, respectively.”
Lu 等 - 2020 - One-pot Green Synthesis of Carboxylated Cellulose DOI: 10.1016/j.biortech.2007.04.029 -
Alkyl C-H Vertrauen 1,0
“ECS Journal of Solid State Science and Technology, 6 (7) R88-R95 (2017) R91 cm-1 cm-1 The absorption band at 3450 and 1630 can be attributed bond.51 to the symmetric stretching and bending vibration of H-O-H Theabsorptionbandobtainedat1386c”
Mondal 和 Manam - 2017 - Structural and Luminescent Properties of Si4+ Co-D DOI: 10.1149/2.0021708jss -
Carbohydrate Vertrauen 1,0
“3a and b) the intensipeak is often taken as cm-1 ties of carbohydrate bands at 1734, 1375, 1320, 1158, 1060 a reference for lignin, while the 1738, 1158 or 898 cm-1 and 898 decrease and carbohydrate bands at 1320, peaks as polysaccharide re”
Pandey 和 Pitman - 2003 - FTIR studies of the changes in wood chemistry foll DOI: 10.1016/S0964-8305(03)00052-0 -
Acetate Vertrauen 1,0
“-C-O stretching (cid:3)-glucosidic (cid:3)-glucosidic Asymmetric out of plane bond stretch 898 Asymmetric out of plane bond stretch 900 3.2.”
Slightly carbomethylated cotton supported TiO2 nanoparticles as self-cleaning fabrics DOI: 10.1016/j.molcata.2014.11.012 -
Metal oxo Vertrauen 1,0
“LLM confirmed rule peak-group candidate”
Determination of photoelectrochemical water oxidation intermediates on haematite electrode surfaces using operando infrared spectroscopy DOI: 10.1038/NCHEM.2557 -
Acetate Vertrauen 1,0
“Also, the FTIR band at cm-1, 898 assigned to C-O-C stretching, is known as an ''amorphous'' absorption band.”
Surface modification of nanosatrch using nano silver: a potential antibacterial for food package coating DOI: 10.1007/s13197-017-2996-7
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