What absorbs at 1306 cm⁻¹ in an FTIR spectrum?
A band near 1306 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
Brzi odgovor
A band near 1306 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.
Moguće dodjele funkcionalnih skupina
| Funkcionalna skupina | Potporni dokazi | Citirani izvori | Najveća pouzdanost |
|---|---|---|---|
| Amide | 5 | 5 | 1,0 |
| Secondary amine | 4 | 4 | 1,0 |
| C n single bond | 4 | 4 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 2 | 2 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Chitosan | 1 | 1 | 1,0 |
| Nucleic acid | 1 | 1 | 1,0 |
Rangiranje odražava akumulirane literaturne dokaze, a ne jedno autoritativno pravilo. Uvijek provjerite u kontekstu vašeg uzorka.
Mogući materijali
| Materijal | Potporni vrhovi | Preklapajuće skupine | Citirani izvori |
|---|---|---|---|
| polyurethane | 1306, 2270, 1700 | Methacrylate, Amide | 1 |
| Polypyrrole | 1306, 1700, 400 | Amide, Secondary amine, C n single bond | 1 |
Materijali su prikazani samo kada ista literatura podržava ovu traku i barem jedan dodatni karakteristični vrh.
Logika spektra
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 1306 cm⁻¹ is usually not enough for material identification by itself.
Upotreba u stvarnom svijetu
Ova vrsta upita uobičajena je u identifikaciji polimera, probiru nepoznate plastike, rješavanju problema u kontroli kvalitete, provjeri recikliranog materijala i pregledu dodjele vrhova potkrijepljenom literaturom.
Uobičajene pogreške
- Tretiranje jedne izolirane vrpce kao dokaza materijala bez provjere barem jednog ili dva podržavajuća pika.
- Zanemarivanje preklapanja: više funkcionalnih skupina može doprinositi u blizini istog valnog broja.
- Preskakanje validacije kada aditivi, mješavine, oksidacija ili kontaminacija mogu izobličiti spektar.
Savjet za provjeru
Kada nejasnoća ostane, validirajte hipotezu pomoću DSC, GC-MS ili TGA, posebno za mješavine, degradirane uzorke i punjene polimere.
Literatura iza ovih dodjela
-
Nucleic acid pouzdanost 1,0
“1338cm(cid:2)1, 993cm(cid:2)1 which was not seen in Bacilwhich is due to nucleic acids, and the which located at that reason the peak at 1306 S.”
Use of Fourier transform infrared spectroscopy for rapid comparative analysis of Bacillus and Micrococcus isolates DOI: 10.1016/j.foodchem.2008.08.063 -
Amide pouzdanost 1,0
“The peak at 1306.3cm(cid:1)1(-C-N-) are assigned to the asymmetric and symfibers were washed and dried to obtain chitosan/polypyrrole metric stretching vibration of the polypyrrole (PPy), respectcomposite fibers and coded as CS-PPy1.”
Fabrication and Properties of Conductive Chitosan/Polypyrrole Composite Fibers DOI: 10.1080/03602559.2014.935420 -
Amide pouzdanost 1,0
“As isolated finish enable the peak located at ~2923 Technora fibres contain PPTA sequences similar to Twaron fibres, the spectra display some cm-1 peaks related to the amide functions in common [10]: the peak located at ~1639 is cm-1 is rel”
Derombise 等 - 2009 - Degradation of Technora aramid fibres in alkaline DOI: 10.1016/j.polymdegradstab.2009.07.021 -
Amide pouzdanost 1,0
“As Technora fibres contain PPTA sequences, Technora and Twaron fibres cm-1 spectra have some peaks related to the amide functions in common: the peak located at ~1639 cm-1 is related to the C=O vibration and the peak at ~1306 is related to”
Influence of finish treatment on the durability of aramid fibers aged under an alkaline environment DOI: 10.1002/app.31534 -
Amide pouzdanost 1,0
“chalcone carbonyl carbon symmetrical stretching absorption appeared at 1727 An cm-1 absorption band that appeared around 1306 corresponds to C-N stretching and the cm-1 sharp absorption bands that appeared around 1012 and 771 are due to imi”
Synthesis and In Vitro Antimicrobial Evaluation of Photoactive Multi—Block Chalcone Conjugate Phthalimide and 1,8-Naphthalimide Novolacs DOI: 10.3390/polym13111859 -
Amide pouzdanost 1,0
“Another indication that a trans-form of the secondary cm-1 acyclic amide gives band at 1306 was attributable to amide III band, of (CN)”
Ilic-Stojanovic 等 - 2018 - Thermosensitive hydrogels for modified release of DOI: 10.1080/00914037.2017.1354202 -
C c single bond pouzdanost 1,0
“cm-1 cm-1 V from C-COO stretching, 1098/1065 cm-1 (amorphous/crystalline) from C-O-C stretching, at β-(1→4) β-(1→4) from glycosidic linkage from inulin, at 1059 and 1270 cm-1 from C-O-C, C-O, and C-C glycosidic linkage from inulin, at 1059”
Synthesis and Characterization of Inulin-Based Responsive Polyurethanes for Breast Cancer Applications DOI: 10.3390/polym12040865 -
Hydroxyl (O-H) pouzdanost 1,0
“(C-O)h (O-H)h 1696 (O-H)c stretch (C-O)c bending bending stretch 1306 DP-M”
Somphon 和 Makatan - 2019 - Characterization of donepezil prepared by cogrindi DOI: 10.2306/scienceasia1513-1874.2019.45.028
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