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
Hurtigt svar
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.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| 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 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| 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 |
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 898 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
“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 tillid 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) tillid 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 tillid 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 tillid 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 tillid 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 tillid 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 tillid 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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