What absorbs at 1344 cm⁻¹ in an FTIR spectrum?
A band near 1344 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
Mabilis na sagot
A band near 1344 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 |
|---|---|---|---|
| Methoxy (OCH3) | 4 | 4 | 1.0 |
| Methacrylate | 4 | 4 | 1.0 |
| C-O single bond | 4 | 4 | 1.0 |
| Acetate | 4 | 4 | 1.0 |
| Alkyl C-H | 3 | 3 | 1.0 |
| Hydroxyl (O-H) | 3 | 3 | 1.0 |
| Aromatic ring | 2 | 2 | 1.0 |
| Lipid | 1 | 1 | 1.0 |
| Amino acid | 1 | 1 | 1.0 |
| Nitro (NO2) | 1 | 1 | 1.0 |
| S s | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Amine primary | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Alkene (C=C) | 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 |
|---|---|---|---|
| diamond | 1344, 1378, 1332 | Methoxy (OCH3) | 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 1344 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
-
kumpiyansa 1.0
“Recorded in Fig.2(a), the incorporated nitrogen impurity in the form of single substitutional atoms (C-centers) is corresponding to the peaks at 1344cm-1, 1130 and which is attributed to typical Ib”
B–C Bond in Diamond Single Crystal Synthesized with h-BN Additive at High Pressure and High Temperature DOI: 10.1088/0256-307X/33/2/028101 -
kumpiyansa 1.0
“Characteristic absorption for C-centers (single substitutional N atoms).”
Li 等 - 2017 - Synthesis of n-type semiconductor diamond single c DOI: 10.1088/1757-899X/274/1/012131 -
Acetate kumpiyansa 1.0
“peaks located at 1147, 1344, and 1369 due to C-O stretching vibrationofesterandCH3bendingvibrationoflipid.Thepeaks 1344cm-1 around 1083, 1137, 1186, and are caused by C-O distinguished from the absorption.”
Wu 等 - 2023 - Infrared and Terahertz Spectra of Pu'er White Tea DOI: 10.1155/2023/3290917 -
kumpiyansa 1.0
“5 illustrates that nitrogen in diamond is predominantly in cm-1 at the C-form with strong and sharp peaks at 1130 and 1344 cm-1) low temperature (below 1500 °C).”
Yan 等 - 2016 - The effect of phosphorus and nitrogen co-doped on DOI: 10.1016/j.ijrmhm.2015.08.009 -
Hydroxyl (O-H) kumpiyansa 1.0
“1400 OH Stretch Overtone 1344 SiO 4 1050 Fe-O-Si/Si-O-Si”
do Nascimento-Dias 等 - 2020 - Detection of organic or inorganic material in Mart DOI: 10.1017/S147355042000021X -
Alkyl C-H kumpiyansa 1.0
“cm-1 In the case of pure PEO, for the distinctive peaks between 800-1400 in the spectrum, the cm-1, stretching vibration peak of C-O-C splits into three peaks at 1146, 1110, and 1062 and the two cm-1 bands appeared at 1344, and 1359 can be”
Preparation and Composition Optimization of PEO:MC Polymer Blend Films to Enhance Electrical Conductivity DOI: 10.3390/polym11050853 -
Aromatic ring kumpiyansa 1.0
“The symmetrical stretching frequency of the benzene rings become intense at 1555 The C=C symmetrical conjugated bond stretching frequency of the benzene rings becomes intense at 1344 cm-1.”
Aktas 等 - 2020 - A Novel Ag-N-Heterocyclic Carbene Complex Bearing DOI: 10.3390/cryst10030171 -
Alkyl C-H kumpiyansa 1.0
“cm1 cm1 cmprincipal bands at 3561, 3496 (stretching of O-H bonds), 1724 (stretching of C = O), 1344 1 cm1 cm1 (bending of C-H bonds), 1282, 1269, 1251 (stretching of C-O bonds), and 1046 (stretching of”
Ali 等 - 2023 - Nitazoxanide and azithromycin for the early treatm DOI: 10.21203/rs.3.rs-1745239/v1
May spectrum ka ba na may ganitong band?
I-upload ang iyong FTIR spectrum at makakuha ng buong interpretasyon na ulat — mga pagtatalaga ng peak na may mga pagsipi ng literatura, pagtutugma ng library, at isang kadena ng ebidensya na may rating ng kumpiyansa — sa loob ng ilang segundo.