What absorbs at 911 cm⁻¹ in an FTIR spectrum?
A band near 911 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 911 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 |
|---|---|---|---|
| Alkyl C-H | 4 | 4 | 1,0 |
| Ring structure | 2 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Bromine | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Ammonium | 1 | 1 | 1,0 |
| Styrene | 1 | 0 | 1,0 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
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 911 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
-
Alkyl C-H tillid 1,0
“These peaks represent C-H (PB).33,34 cm(cid:3)1 Another peak was observed around 911 bending of trans-alkene in polybutadiene wave number for the LP of CRMA interacted at 190-50 that represents the C-H bending of PB.34 At the aforementioned”
Effect of used motor oil as a rejuvenator on crumb rubber modifier’s released components to asphalt binder DOI: 10.1177/1477760620918600 -
Alkyl C-H tillid 1,0
“910a 914b P-O-(C) stretch/CH wagging 911 909 3 10071”
Gillens 和 Powell - 2013 - Rapid quantification of TBP and TBP degradation pr DOI: 10.1007/s10967-012-2147-6 -
tillid 1,0
“795.33cm(cid:2)1 (Si-O stretch) and absorption from trioctahedrals), 910.81cm(cid:2)1 (Al 2OH bending) shown in Fig.”
Ultrasonic extraction of arsenic and selenium from rocks associated with mountaintop removal/valley fills coal mining: Estimation of bioaccessible concentrations DOI: 10.1016/j.chemosphere.2010.01.020 -
Ammonium tillid 1,0
“In the present work, the spectral study of the solution UNIVERSITY 21 209 prepared using ammonium molybdate salt shows strong (broad and sharp) absorption bands at 911±2, 889±2 22 cm-1 cm-1 210 23 and 856±2 (Fig.”
Sen 等 - 2015 - Nanogram level quantification of molybdenum(VI) by DOI: 10.1039/C5AY01801C. -
Alkyl C-H tillid 1,0
“The last peaks (910.91 and cm-1) 877.69 correspond to a bending out of plane vibration =CH (aromatic ring).”
Belo 等 - 2018 - Development of a Black Liquor Electrolyzer for Lig DOI: 10.1149/08604.0003ecst -
Acetate tillid 1,0
“by the presence of C-O stretching at 911 Other characteristic IR bands can be”
Thermal and surface properties of hybrid materials obtained from epoxy-functional urethane and siloxane DOI: 10.1007/s00289-015-1545-7 -
C c single bond tillid 1,0
“u n cm-1 The wavenumbers separating normal tissue from meningioma are 911 (C-C stretching d e cm-1 cm-1 r ≈964”
Gajjar 等 - 2013 - Diagnostic segregation of human brain tumours usin DOI: 10.1039/C2AY25544H. -
tillid 1,0
“On the other hand, the weak negative band cm-1 at 911 was assigned to the C15-H and N-H HOOP vibrations of the original state of BR [35].”
Kawanabe 和 Kandori - 2009 - Photoreactions and Structural Changes of Anabaena DOI: 10.3390/s91209741
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