What absorbs at 3306 cm⁻¹ in an FTIR spectrum?
Et bånd nær 3306 cm⁻¹ kan peke på flere funksjonelle grupper. Nedenfor er de mest sannsynlige tildelingene, rangert etter hvor mye publiserte bevis som støtter hver — hver enkelt sporbar til litteratur (DOI) og kryssvalidert mot våre 130 000+ referansespektre og kunnskapsgraf.
Backed by 8 cited sources
Raskt svar
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.
Mulige funksjonelle gruppe-tilordninger
| Funksjonell gruppe | Støttende fakta | Siterte kilder | Toppkonfidens |
|---|---|---|---|
| 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 |
Rangeringen gjenspeiler akkumulert litteraturbevis, ikke en enkelt autoritativ regel. Bekreft alltid mot prøvekonteksten din.
Mulige materialer
| Materiale | Støttetopper | Overlappende grupper | Siterte kilder |
|---|---|---|---|
| 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 |
Materialer vises kun når samme litteraturbase støtter dette båndet og minst en annen karakteristisk topp.
Spektrum-logikk
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.
Virkelig bruk
Denne typen forespørsel er vanlig i polymeridentifikasjon, screening av ukjent plast, feilsøking i kvalitetskontroll, verifisering av resirkulert materiale og litteraturstøttet gjennomgang av topptilordning.
Vanlige feil
- Behandle ett isolert bånd som bevis på et materiale uten å sjekke minst en eller to støttende topper.
- Ignorerer overlapping: flere funksjonelle grupper kan bidra nær samme bølgetall.
- Hopp over validering når tilsetningsstoffer, blandinger, oksidasjon eller forurensning kan forvrenge spekteret.
Verifiseringsråd
Når tvetydighet gjenstår, valider hypotesen med DSC, GC-MS eller TGA, spesielt for blandinger, nedbrutte prøver og fylte polymerer.
Litteratur bak disse tilordningene
-
Hydroxyl (O-H) konfidens 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) konfidens 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 -
konfidens 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) konfidens 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 -
konfidens 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) konfidens 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 -
konfidens 0.9
“assigned to -CO-NH-”
Liu 等 - 2013 - Synthesis and Application of a Novel Polyamide Cha DOI: 10.1155/2013/616859 -
N h konfidens 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
Har du et spektrum med denne bånden?
Last opp FTIR-spektrumet ditt og få en full tolkningsrapport — topptilordninger med litteraturhenvisninger, bibliotekssøk og en konfidensvurdert beviskjede — på sekunder.