What absorbs at 2907 cm⁻¹ in an FTIR spectrum?
Et bånd nær 2907 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.
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Raskt svar
A band near 2907 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 |
|---|---|---|---|
| Alkyl C-H | 8 | 8 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Acetate | 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 | 2907, 1660, 2930 | Alkyl C-H, Methacrylate, Methoxy (OCH3) | 1 |
| Chitosan | 2907, 1650, 1655 | Alkyl C-H, Methacrylate, Methoxy (OCH3) | 1 |
| Fe3O4 | 2907, 2358, 1673 | Alkyl C-H, Methacrylate | 1 |
| proteins | 2907, 1735, 1270 | Methacrylate, Alkyl C-H, Methoxy (OCH3) | 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 2907 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
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Acetate konfidens 1.0
“on 1412 CH2, CH3 bending Acid phosphatase [31, 35] 16 Island 1447 CH2, CH3 bending Tryptophane [31] It is worth mention that the peaks at 2907 and 2968 17 1667 Amide I Protein [27] cm-1 haven't been characterized and discussed in”
Zou 等 - 2016 - Whole blood and semen identification using mid-inf DOI: 10.1039/C5AY03337C. -
Alkyl C-H konfidens 1.0
“For AD-rhEPO, the cm-1 alone.Theseresultswereinaccordancewiththeresultsreband at 2907.3 represents the -C-H groups of AD, and cm-1”
Application of SPRA Technology for Delivery of Erythropoietin: Stability Evaluation of Conjugated Erythropoietin with Adamantane and in SPRA Inclusion Complex DOI: 10.5812/ijpr-134282. -
Alkyl C-H konfidens 1.0
“The mecm(cid:2)1 cm(cid:2)1 dium band at 2944 with shoulder at 2907 can be assigned to the stretchcm(cid:2)1 ing vibrations of CH 2.”
Synthesis, crystal structure, and characterization of cyclohexylammonium tetraisothiocyanatocobaltate(II): A single-source precursor for cobalt sulfide and oxide nanostructures DOI: 10.1016/j.heliyon.2019. -
Alkyl C-H konfidens 1.0
“Adcm-1 ditionally, there are two bands at 2907 and 1402 which attributed to C-H stretching vibration and in-plane respectively31.”
Fabrication of attapulgite/magnetic aminated chitosan composite as efficient and reusable adsorbent for Cr (VI) ions DOI: 10.1038/s41598-021-96145-6 -
Alkyl C-H konfidens 1.0
“N-H the broadband at 3244 shifting of this band was accentuated as the LiClO is attributed to the 4 stretching.79 cm-1 The absorbance band at 2907 is associated concentration increased, which seems to suggest an interaction OHLi+ C-H with s”
Gurumendi 等 - 2023 - Enhanced Chitosan Photoluminescence by Incorporati DOI: 10.1021/acsomega.2c08072 -
Alkyl C-H konfidens 1.0
“2963, 2907 cm-1 cm-1 and 2873 were the stretching vibration absorption peaks of saturated C-H, 1730 was the stretching”
Terpolymer resin containing bioinspired borneol and controlled release of camphor: Synthesis and antifouling coating application DOI: 10.1038/s41598-020-67073-8 -
Alkyl C-H konfidens 1.0
“The peaks that appeared at 2937 cm-1 and 2907 cm-1 were due to the symmetric and asymmetric stretching vibration peaks of methylene [46].”
Preparation of a Cation Exchange Membrane by a Sol-Gel Method-Based Polyvinyl Alcohol to Improve Alkali Recovery via Diffusion Dialysis in the Textile Industry DOI: 10.3390/separations10070370 -
Alkyl C-H konfidens 0.9
“Stretching vibrations of C-H.”
Fungal Biodeterioration of a Historical Manuscript Dating Back to the 14th Century: An Insight into Various Fungal Strains and Their Enzymatic Activities DOI: 10.3390/life12111821
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