What absorbs at 1177 cm⁻¹ in an FTIR spectrum?
A band near 1177 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 1177 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 |
|---|---|---|---|
| Fluorine (C-F) | 2 | 2 | 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 |
| Ester | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| S eq o | 1 | 1 | 0,9 |
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 |
|---|---|---|---|
| cotton | 1177, 1030, 1638 | Methacrylate, C-O single bond, Methoxy (OCH3) | 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 1177 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
-
Fluorine (C-F) Vertrauen 1,0
“On the which can be attributable to and stretching viν other hand, brationalmodes,respectively, in 70wt.%PVdF-HFP-30 wt.%LiCF a(CF 2) band originating from PVdF-HFP was found at 3SO 3, 1176cm-1,1177 cm-1and1178cm-1inS30,6ECand6PCsamples.”
Characteristics of PEMA/PVdF-HFP blend polymeric gel films incorporated with lithium triflate salt in electrochromic device DOI: 10.1016/j.ssi.2011.11.035 -
Phosphate (PO4) Vertrauen 1,0
“The P=O stretching at 1177 and 1184”
Verma 等 - 2018 - Structural investigations on uranium(VI) and thori DOI: 10.1039/C7NJ04460G. -
Alkyl C-H Vertrauen 1,0
“The main absorption peaks were cm-1, Additionally, some additional peaks were recorded at 1454 and 1381 due to the asymmetric observed at 3020 and 2943 cm-1, 1743 cm-1 and 1177 cm-1 due to CH stretching of methyl and methylene cm-1 and symm”
Eleftheriadou 等 - 2020 - Development of Novel Polymer Supported Nanocomposi DOI: 10.3390/app10072368 -
Ester Vertrauen 1,0
“However, it is very difficult to determine the degree of esterification due to the presence Materials2022,15,470 8of13 and 1177 cm-1, a peak is formed of ester bonds in the polyester.”
Grgac 等 - 2022 - The Effect of Ultrasonic Treatment on the Binding DOI: 10.3390/ma15020470 -
Vertrauen 1,0
“Moreover, asymmetric S O stretching 2 cm-1, cm-1, = at 1355 and symmetric S O stretching at 1177 were observed in the FTIR spectra 2 of tosylated cellulose, which confirmed the tosylation reaction.”
A Composite Anion Conducting Membrane Based on Quaternized Cellulose and Poly(Phenylene Oxide) for Alkaline Fuel Cell Applications DOI: 10.3390/polym12112676 -
Acetate Vertrauen 1,0
“cm-1 1177 C-O-C stretch bands were found near 1016 The band near 754 work [25].”
Tannic Acid-Loaded Hydroxyapatite Carriers for Corrosion Protection of Polyolefin-Coated Carbon Steel DOI: 10.3390/app122010263 -
Fluorine (C-F) Vertrauen 1,0
“cm-1 Similarly, this shifting exists in the new band displayed as a broad band at 1177 cm-1 v within the first 50 s that grows and stabilizes at 1170 corresponding to the s(CF 2) +”
Torres-Rodriguez 等 - 2022 - Polyvinylidene Fluoride Aerogels with Tailorable C DOI: 10.3390/gels8110727 -
Vertrauen 0,9
“Absorbance band at about 1177 cm-1 (C-O).”
Volatile out gassing characteristics of highly filled ethylene vinyl acetate binder materials: Gas phase infra-red spectroscopy DOI: 10.1016/j.polymertesting.2012.12.001
Haben Sie ein Spektrum mit dieser Bande?
Laden Sie Ihr FTIR-Spektrum hoch und erhalten Sie in Sekunden einen vollständigen Interpretationsbericht – Peakzuweisungen mit Literaturzitaten, Bibliotheksübereinstimmungen und einer vertrauensbewerteten Evidenzkette.