What absorbs at 3306 cm⁻¹ in an FTIR spectrum?
A band near 3306 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
Ateb cyflym
A band near 3306 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.
Aseiniadau grŵp swyddogaethol posibl
| Grŵp swyddogaethol | Ffeithiau ategol | Ffynonellau a ddyfynnwyd | Hyder uchaf |
|---|---|---|---|
| Hydroxyl (O-H) | 4 | 4 | 1.0 |
| N h | 4 | 4 | 1.0 |
| Amide | 2 | 2 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| Carbohydrate | 1 | 1 | 1.0 |
Mae＇r safle＇n adlewyrchu tystiolaeth llenyddiaeth gronnwyd, nid rheol awdurdodol sengl. Cadarnhewch bob amser yn erbyn eich cyd-destun sampl.
Deunyddiau posibl
| Deunydd | Copaon ategol | Grwpiau sy＇n gorgyffwrdd | Ffynonellau a ddyfynnwyd |
|---|---|---|---|
| PVA | 3306, 1660, 2930 | Hydroxyl (O-H), Amide | 1 |
| Starch | 3306, 1650, 1540 | Hydroxyl (O-H), Amide | 1 |
| nanotube | 3306, 1540, 1080 | Amide, N h, Hydroxyl (O-H) | 1 |
| chitosan | 3306, 1650, 1655 | Amide, Hydroxyl (O-H), N h | 1 |
| silver nanoparticles | 3306, 1636, 1631 | Hydroxyl (O-H), Amide, N h | 1 |
| collagen | 3306, 1408, 1660 | Amide, N h | 1 |
Mae deunyddiau＇n cael eu dangos dim ond pan fydd yr un gronfa lenyddiaeth yn cefnogi＇r band hwn ac o leiaf un brig nodweddiadol ychwanegol.
Rhesymeg sbectrwm
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 3306 cm⁻¹ is usually not enough for material identification by itself.
Defnydd yn y byd go iawn
Mae＇r math hwn o ymholiad yn gyffredin mewn adnabod polymer, sgrinio plastig anhysbys, datrys problemau QC, dilysu deunydd wedi＇i ailgylchu, ac adolygiad o aseiniad copa wedi＇i gefnogi gan lenyddiaeth.
Camgymeriadau cyffredin
- Trin un band ynysig fel prawf o ddeunydd heb wirio o leiaf un neu ddau gopa cefnogol.
- Anwybyddu gorgyffwrdd: gall grwpiau swyddogaethol lluosog gyfrannu ger yr un rhif ton.
- Hepgor dilysu pan fo ychwanegion, cymysgeddau, ocsideiddio, neu halogiad yn gallu ystumio＇r sbectrwm.
Cyngor dilysu
Pan fo amwysedd yn parhau, dilyswch y rhagdybiaeth gyda DSC, GC-MS, neu TGA, yn enwedig ar gyfer cymysgeddau, samplau dirywiedig, a pholymerau llawn.
Llenyddiaeth y tu ôl i＇r aseiniadau hyn
-
Hydroxyl (O-H) hyder 1.0
“cm-1 the FTIR (ATR) The broad band at 3306.05 revealed study reported a lower value of crystallinity index From Previous presence of OH group in cellulose [20,21], while the band PALF, which was 13.74% compared to the current study [30].”
Characterization of silane treated Malaysian Yankee Pineapple AC6 leaf fiber (PALF) towards industrial applications DOI: 10.1016/j.jmrt.2020.01.058 -
Hydroxyl (O-H) hyder 1.0
“However, the absorption peaks at 3306 due to stretching of O-H appear in all spectra, where they are belonging to PVA.”
Highly Conductive Polyelectrolyte Membranes Poly(vinyl alcohol)/Poly(2-acrylamido-2-methyl propane sulfonic acid) (PVA/PAMPS) for Fuel Cell Application DOI: 10.3390/polym13162638 -
hyder 1.0
“It exhibits a relatively broad peak at about 3306 cm-1 attributed to the N-H stretching vibrations (with NH involved in”
Evaluation of Water Sorption and Solubility and FTIR Spectroscopy of Thermoplastic Orthodontic Retainer Materials Subjected to Thermoforming and Thermocycling DOI: 10.3390/app13085165 -
Hydroxyl (O-H) hyder 1.0
“TEM 2114, and 1635 The peaks at 3306 and 2114 reveals that the CRE-AgNPs are spherical in shape with a wellcorrespond to the stretching vibration of OH in the alcoholic C�C”
Bakthavatchalam 等 - 2023 - Biogenic Synthesis and Characterization of Silver DOI: 10.1021/acsomega.2c07531 -
hyder 1.0
“Fourier Transform Infrared Spectroscopy (FTIR) Analysis with N-H stretching frequency, occurred at 3304.82 and 3305.90 cm-1 for ASC and PSC, respectively.”
Physicochemical Properties and Biocompatibility Evaluation of Collagen from the Skin of Giant Croaker (Nibea japonica) DOI: 10.3390/md16070222 -
Hydroxyl (O-H) hyder 1.0
“The maximum of hydroxyl band shifts from 3306 cm-1 to 3391 cm-1 in both types of the samples.”
Ziegler-Borowska 等 - 2018 - Photochemical Reactions in Dialdehyde Starch DOI: 10.3390/molecules23123358 -
hyder 0.9
“assigned to -CO-NH-”
Liu 等 - 2013 - Synthesis and Application of a Novel Polyamide Cha DOI: 10.1155/2013/616859 -
N h hyder 0.9
“Explicit assignment: '3305.87 symmetric stretching' and 'N-H'”
Ni -chitosan/carbon nanotube: An efficient biopolymer -inorganic catalyst for selective hydrogenation of acetylene DOI: 10.1016/j.heliyon.2023.e13523
Oes gennych sbectrwm gyda＇r band hwn?
Llwythwch eich sbectrwm FTIR i fyny a chael adroddiad dehongli llawn — aseiniadau brig gyda chyfeiriadau llenyddiaeth, cyfateb llyfrgell, a chadwyn dystiolaeth â gradd hyder — mewn eiliadau.