What absorbs at 1355 cm⁻¹ in an FTIR spectrum?
A band near 1355 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 1355 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 |
|---|---|---|---|
| Alkyl C-H | 5 | 5 | 1,0 |
| Secondary amine | 3 | 3 | 1,0 |
| C n single bond | 3 | 3 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Nitrogen heterocycle | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Nitrate | 1 | 1 | 1,0 |
| C-O single bond | 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 |
|---|---|---|---|
| lignin | 1355, 1035, 1510 | Alkyl C-H | 1 |
| wood | 1355, 1740, 1730 | Alkyl C-H | 1 |
| PET | 1355, 1408, 800 | Alkyl C-H, Amide | 1 |
| chitosan | 1355, 1650, 1655 | Alkyl C-H, Amide | 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 1355 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
-
Acetate Vertrauen 1,0
“(1355 and C-O stretching (1249 It is noted that, the intensity of C-H and C-O-H bending significantly increased from 3.8% to 20.0% as presented in Fig.”
Solid polymer electrolyte production from 2-hydroxyethyl cellulose: Effect of NH4NO3 composition on its structural properties DOI: 10.1016/j.carbpol.2017.02.033 -
Nitrate Vertrauen 1,0
“Furthermore, the sharp band at 1355 cm(cid:2)1 to the stretching vibrations of the Schiff base groups comindicates the presence of the other nitrate group”
Przybylski 等 - 2008 - ESI MS, spectroscopic and semiempirical characteri DOI: 10.1016/j.molstruc.2007.07.039 -
Alkyl C-H Vertrauen 1,0
“On the other hand, the peak at 1355 was the combination peak of symmetry NO 2, C = O stretching, CH deformation and C-N stretching vibration.”
Synthesis and characterizations of o-nitrochitosan based biopolymer electrolyte for electrochemical devices DOI: 10.1371/journal.pone.0212066 -
Acetate Vertrauen 1,0
“a new band at 1355 cm-1 between the previous occurred and was assigned to wood constituents (-CH 3 fromlignin/hemicellulose/polysaccharide-OH).Theseresultsindicatepossiblechemical interactions between rubber, PET, HDPE, wood, and FA compoun”
The Influence of Fly Ash on the Mechanical Properties of Water Immersed All Waste Composites DOI: 10.3390/polym14101957 -
Alkyl C-H Vertrauen 1,0
“Furthermore, small symmetric stretching bands of formate species can be detected at 1355 cm-1, and the corresponding δ (CH) at 1375 cm-1 [88,89].”
CO2 Methanation over Nickel Catalysts: Support Effects Investigated through Specific Activity and Operando IR Spectroscopy Measurements DOI: 10.3390/catal13020448 -
Alkyl C-H Vertrauen 1,0
“The band derived from the -C-H bond at a wavenumber of 1355 cm-1 also slightly changes.”
Preparation and Characterization of Indomethacin Supramolecular Systems with -Cyclodextrin in Order to Estimate Photostability Improvement DOI: 10.3390/molecules26247436 -
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 -
C c single bond Vertrauen 1,0
“FTIR peaks at 1355, 1039, 1034, 1023, 1001, 999 C-C-Cinplanebend cm(cid:1)1 151 510.1825 492.8 120.4 & are indicative of this.”
Computational and spectral studies of 3,3'-(propane-1,3-diyl)bis(7,8-dimethoxy-1,3,4,5-tetrahydro-2H-benzo[d]azepin-2-one) DOI: 10.1016/j.heliyon.2019.e02420
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