What absorbs at 3048 cm⁻¹ in an FTIR spectrum?
A band near 3048 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 5 cited sources
Mabilis na sagot
A band near 3048 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.
Mga posibleng pagtatalaga ng functional-group
| Grupong functional | Mga sumusuportang katotohanan | Mga nasiping sanggunian | Pinakamataas na kumpiyansa |
|---|---|---|---|
| Hydroxyl (O-H) | 2 | 2 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
Ang pagraranggo ay sumasalamin sa naipon na ebidensya ng literatura, hindi isang solong awtoritatibong tuntunin. Palaging kumpirmahin laban sa konteksto ng iyong sample.
Mga posibleng materyales
| Materyal | Sumusuportang mga peak | Mga overlapping na grupo | Mga nasiping sanggunian |
|---|---|---|---|
| PDMS | 3048, 873, 1080 | Alkyl C-H | 1 |
Ang mga materyales ay ipinapakita lamang kapag ang parehong literatura pool ay sumusuporta sa banda na ito at hindi bababa sa isang karagdagang katangian na tuktok.
Logic ng spectrum
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 3048 cm⁻¹ is usually not enough for material identification by itself.
Paggamit sa totoong mundo
Ang uri ng query na ito ay karaniwan sa pagtukoy ng polymer, screening ng hindi kilalang plastic, pag-troubleshoot ng QC, pag-verify ng recycled na materyal, at pagsusuri ng pagtatalaga ng peak na may suporta ng literatura.
Mga karaniwang pagkakamali
- Pagtrato sa isang nakahiwalay na banda bilang patunay ng isang materyal nang hindi sinusuri ang hindi bababa sa isa o dalawang sumusuportang peak.
- Hindi pinapansin ang overlap: maraming functional group ang maaaring mag-ambag malapit sa parehong wavenumber.
- Pag-laktaw sa pagpapatunay kapag ang mga additives, blends, oxidation, o contamination ay maaaring mag-distort ng spectrum.
Payo sa pagpapatunay
Kapag nananatili ang kalabuan, patunayan ang hypothesis gamit ang DSC, GC-MS, o TGA, lalo na para sa mga blend, degraded na sample, at filled polymers.
Literatura sa likod ng mga pagtatalagang ito
-
Hydrogen bond kumpiyansa 1.0
“overtone of strong bands near The wide band at of the five deuteron groups, bound with hydrogen bonds, 3060cm-1 3048cm-1 ca.”
Rozenberg 等 - 2005 - Low-temperature FTIR spectra and hydrogen bonds in DOI: 10.1016/j.saa.2004.05.024 -
Alkyl C-H kumpiyansa 1.0
“In the FT-IR spectrum of 3-ATP, cm-1 asymmetric C-H stretching vibration is observed at 3048 [24] and this band is calculated at cm-1.”
Kalayci 等 - 2021 - EXPERIMENTAL AND THEORETICAL INVESTIGATIONS (FTIR, DOI: 10.4314/bcse.v35i3.11 -
Hydroxyl (O-H) kumpiyansa 1.0
“cm-1 The infrared spectrum of the ligand shows a medium intensity band at 3048 which is assigned to (OH) of the carboxylic acid group.”
Osunniran 等 - 2020 - TOXICOLOGICAL ASSESSMENT OF SYNTHESIZED AND CHARAC DOI: 10.4314/bcse.v34i3.6 -
Aromatic ring kumpiyansa 1.0
“IR spectrum, max, 3448 & 3277 ¼ C-H pyrazoline), 4.02 (1H, dd, J 12.4 Hz and 6.0 Hz, Hb protons of (amine stretching), 3048 (aromatic stretching), 2973, 2929 pyrazoline),4.40(2H,q,J¼7.2Hz,-CH (aliphaticC-Hstretching),1730(C]Ostretchingofd-l”
Coumarin–carbazole based functionalized pyrazolines: synthesis, characterization, anticancer investigation and molecular docking DOI: 10.1039/d1ra03970a -
Hydroxyl (O-H) kumpiyansa 0.8
“Text: 'groups(-OH) stretching vibrations of the hydroxyl and oxygen- tion method ... 3048cm-1 3150cm-1'”
Slaughter 和 Stevens - 2014 - A cost-effective two-step method for enhancing the DOI: 10.1007/s13206-014-8105-3
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