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
Snabbt svar
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.
Möjliga identifieringar av funktionella grupper
| Funktionell grupp | Stödjande fakta | Citerade källor | Högsta förtroende |
|---|---|---|---|
| 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 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Möjliga material
| Material | Stödjande toppar | Överlappande grupper | Citerade källor |
|---|---|---|---|
| polyurethane | 1306, 2270, 1700 | Methacrylate, Amide | 1 |
| Polypyrrole | 1306, 1700, 400 | Amide, Secondary amine, C n single bond | 1 |
Material visas endast när samma litteraturpool stöder detta band och minst en ytterligare karakteristisk topp.
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 1306 cm⁻¹ is usually not enough for material identification by itself.
Användning i verkligheten
Denna typ av fråga är vanlig inom polymeridentifiering, screening av okänd plast, felsökning av kvalitetskontroll, verifiering av återvunnet material och litteraturstödd toppidentifieringsgranskning.
Vanliga misstag
- Behandla ett isolerat band som bevis på ett material utan att kontrollera minst en eller två stödjande toppar.
- Ignorerar överlapp: flera funktionella grupper kan bidra nära samma vågtal.
- Hoppa över validering när tillsatser, blandningar, oxidation eller föroreningar kan förvränga spektrat.
Verifieringsråd
När oklarhet kvarstår, validera hypotesen med DSC, GC-MS eller TGA, särskilt för blandningar, nedbrutna prover och fyllda polymerer.
Litteratur bakom dessa identifieringar
-
Nucleic acid förtroende 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 förtroende 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 förtroende 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 förtroende 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 förtroende 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 förtroende 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 förtroende 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) förtroende 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
Har du ett spektrum med detta band?
Ladda upp ditt FTIR-spektrum och få en fullständig tolkningsrapport – toppidentifieringar med litteraturhänvisningar, biblioteksmatchningar och en förtroendebedömd beviskedja – på sekunder.