What absorbs at 902 cm⁻¹ in an FTIR spectrum?
A band near 902 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
Përgjigje e shpejtë
A band near 902 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.
Caktime të mundshme të grupeve funksionale
| Grup funksional | Fakte mbështetëse | Burimet e cituara | Besueshmëri e lartë |
|---|---|---|---|
| Phosphate (PO4) | 3 | 3 | 1,0 |
| C-O single bond | 3 | 3 | 1,0 |
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Oxygen heterocycle | 2 | 2 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 0,7 |
Renditja pasqyron provat e grumbulluara të literaturës, jo një rregull të vetëm autoritar. Gjithmonë konfirmoni në kontekstin e mostrës suaj.
Materialet e mundshme
| Material | Maja mbështetëse | Grupe të mbivendosura | Burimet e cituara |
|---|---|---|---|
| SiO | 902, 800, 1745 | Methacrylate, Methoxy (OCH3), C-O single bond | 1 |
Materialet shfaqen vetëm kur i njëjti grup literature mbështet këtë brez dhe të paktën një pik karakteristik shtesë.
Logjika e spektrit
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 902 cm⁻¹ is usually not enough for material identification by itself.
Përdorimi në botën reale
Ky lloj pyetjeje është i zakonshëm në identifikimin e polimereve, skriningun e plastikës së panjohur, zgjidhjen e problemeve të kontrollit të cilësisë, verifikimin e materialeve të ricikluara dhe rishikimin e caktimit të pikut të mbështetur nga literatura.
Gabimet e zakonshme
- Trajtimi i një brezi të izoluar si provë e një materiali pa kontrolluar të paktën një ose dy pika mbështetëse.
- Duke injoruar mbivendosjen: grupe të shumta funksionale mund të kontribuojnë afër të njëjtit numër valor.
- Kalimi i vërtetimit kur aditivët, përzierjet, oksidimi ose ndotja mund të shtrembërojnë spektrin.
Këshillë për verifikim
Kur mbetet paqartësi, verifiko hipotezën me DSC, GC-MS ose TGA, veçanërisht për përzierjet, mostrat e degraduara dhe polimerët e mbushur.
Literatura pas këtyre caktimeve
-
besueshmëri 1,0
“FTIR spectra hydrophobic state resulted from surface treatment involving of Hybrid Al 2O 3-SiO shows additional peak at 902, 850, 2 cm-1”
Damayanti - 2010 - Preparation of superhydrophobic PET fabric from Al DOI: 10.1007/s10971-010-2271-0 -
Oxygen heterocycle besueshmëri 1,0
“ALG rapidly decomposed into monomers and evenstretching of the epoxy ring at 902 and seen in this study”
Hussin 等 - 2020 - Taguchi design-assisted immobilization of Candida DOI: 10.1016/j.enzmictec.2019.109506 -
Phosphate (PO4) besueshmëri 1,0
“Symmetric vibrations and asymmetric stretching modes of non-bridging or P-O”
Effects of titanium nanoparticles on self-cleaning and structural features of zinc-magnesium-phosphate glass DOI: 10.1016/j.materresbull.2015.11.022 -
Acetate besueshmëri 1,0
“Polymers2022,14,3100 4of14 Polymers 2022, 14, x FOR PEER REVIEW 4 of 14 presence of the epoxy group is displayed by the characteristic absorption bands at 902 and cm-1, 853 which areattributed to stretching of C-O-C and C-O of oxirane group”
Synthesis Characterization and Highly Protective Efficiency of Tetraglycidyloxy Pentanal Epoxy Prepolymer as a Potential Corrosion Inhibitor for Mild Steel in 1 M HCl Medium DOI: 10.3390/polym14153100 -
Carbohydrate besueshmëri 1,0
“Finally, at 902 it presents a peak that is associated with the absorption of β-glycosidic the bonds between glucose units in cellulose [36-40].”
Improvement in the Carbonation Resistance of Construction Mortar with Cane Bagasse Fiber Added DOI: 10.3390/ma14082066 -
Phosphate (PO4) besueshmëri 1,0
“(2:1) sample at 298 cm-1, (2:1) sample at 1266 and 902 cm-1, corresponding to the P=O bond and P-O bond from P=O 1266 and 902 corresponding to the bond and P-O bond from polyphosphoric acid produced 299 polyphosphoric acid produced by the d”
Synthesis of a Carrageenan–Iron Complex and Its Effect on Flame Retardancy and Smoke Suppression for Waterborne Epoxy DOI: 10.3390/polym11101677 -
Acetate besueshmëri 1,0
“Regarding the fingerprint area, the peaks at 1022 and 902 cm-1 were mainly associated with C-O and P-O stretching Polymers2019,11,947 5of13”
Degradation of Metal-Organic Framework Materials as Controlled-Release Fertilizers in Crop Fields DOI: 10.3390/polym11060947 -
Phosphate (PO4) besueshmëri 1,0
“The IR band at 902 is assigned to the asymmetric bridging P-O bond H”
Zhang 等 - 2010 - Leaving Group Activation and Pyrophosphate Ionic S DOI: 10.1021/ja107806j.
Keni një spektër me këtë brez?
Ngarkoni spektrin tuaj FTIR dhe merrni një raport të plotë interpretimi — caktim i pikut me citime literaturë, përputhje biblioteke dhe një zinxhir provash të vlerësuar me besueshmëri — në sekonda.