What absorbs at 3232 cm⁻¹ in an FTIR spectrum?
A band near 3232 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
Răspuns rapid
A band near 3232 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.
Atribuiri posibile ale grupelor funcționale
| Grup funcțional | Fapte suport | Surse citate | Încredere maximă |
|---|---|---|---|
| Carbonate | 3 | 3 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| N h | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Nitro (NO2) | 1 | 1 | 1,0 |
| Fluorine (C-F) | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Metal hydroxyl | 1 | 1 | 0,9 |
Clasamentul reflectă dovezile acumulate din literatură, nu o singură regulă autoritară. Confirmați întotdeauna în contextul mostrei dvs.
Materiale posibile
| Material | Vârfuri suport | Grupuri suprapuse | Surse citate |
|---|---|---|---|
| diamond | 3232, 1378, 1332 | Secondary amine, Methoxy (OCH3) | 1 |
| calcium carbonate | 3232, 2954, 1320 | Carbonate, Methoxy (OCH3) | 1 |
Materialele sunt afișate numai atunci când același grup de literatură susține această bandă și cel puțin un vârf caracteristic suplimentar.
Logica spectrului
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 3232 cm⁻¹ is usually not enough for material identification by itself.
Utilizare în condiții reale
Acest tip de interogare este comun în identificarea polimerilor, screeningul materialelor plastice necunoscute, depanarea QC, verificarea materialelor reciclate și revizuirea atribuirii vârfurilor bazată pe literatură.
Greșeli comune
- Tratarea unei benzi izolate ca dovadă a unui material fără a verifica cel puțin unul sau două vârfuri de susținere.
- Ignorând suprapunerea: mai multe grupuri funcționale pot contribui în apropierea aceluiași număr de undă.
- Omiterea validării atunci când aditivii, amestecurile, oxidarea sau contaminarea pot distorsiona spectrul.
Sfat de verificare
Când ambiguitatea rămâne, validați ipoteza prin DSC, GC-MS sau TGA, în special pentru amestecuri, probe degradate și polimeri umpluți.
Literatura din spatele acestor atribuiri
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Hydroxyl (O-H) încredere 1,0
“These features dominant peak at 3309 with two subordinate peaks at 3232 and 3184 These were revealed by FTIR analysis and were found to be related to the structural OH groups features were revealed by FTIR analysis and were found to be rela”
Wang 和 Takahashi - 2023 - Development of Mid-Infrared Absorption Spectroscop DOI: 10.3390/min13050625 -
încredere 1,0
“complex, the same bands were observed at 3232 and Our results revealed that L1, Pt(II)L1 and Pt(II)L2 had cm(cid:2)1 3136 which shifts to lower frequency by 128 and a cytotoxic effect on the human retinoblastoma cell line cm(cid:2)1 53 as c”
Synthesis and in vitro activity of platinum(II) complexes of two fluorenylspirohydantoins against a human tumour cell line DOI: 10.1080/13102818.2014.910363 -
Carbonate încredere 1,0
“42significant the FTIR spectrum shows the powder material to be dehyAs no other HPO peaks were observed in the droxylated (due to the diminished OHpeaks) and conFTIR spectra for the HAp powder, it would be suggested 3232cm-1 taining carbona”
The deposition of strontium and zinc Co-substituted hydroxyapatite coatings DOI: 10.1007/s10856-017-5846-2 -
N h încredere 1,0
“General procedure for the synthesis of 7-hydroxy-4-phenylquinoline cm(cid:2)1): 3462.01, 3376.59, 3336.67 (NH2, hexane (7:3)), FTIR (KBr disc, derivatives (5a-o) (C(cid:3)N), NH stretch), 3231.58, 3186.68, 3066.43 (Ar CH), 2192.36”
7-Hydroxy-4-phenyl-1, 2-dihydroquinoline derivatives: synthesis via one-pot, three-component reaction and structure elucidation DOI: 10.1016/j.heliyon.2020.e05035 -
N h încredere 1,0
“215(cid:3)C 218(cid:3)C, 13C-NMR 2), 4.58 (s, 1H, Hd), (75 MHz, DMSOOff white solid, Yield: 65%, m.p: to Rf: 0.69 2H, NH cm-1): δ n-hexane 6) 160.9(C4), 149.3 (C7, C6), 146.1 (C14), 131.6 (C12), d [Acetone: (7:3)], FTIR (KBr disk, 129.9 (C1”
Development of an Efficient, One-Pot, Multicomponent Protocol for Synthesis of 8-Hydroxy-4-Phenyl-1,2-Dihydroquinoline Derivatives DOI: 10.1002/jhet.4193 -
Carbonate încredere 1,0
“The main calcite bands are centered The 3232at ~2514 [ν1 (CO results of enzymatic analyses also denied the presence of sucrose in symmetric stretching) + ν3 (CO asymmetric”
Zhang 等 - 2020 - CONTRIBUTION OF ENZYMATIC METHOD FOR ANALYZING SUC DOI: 10.21577/0100-4042.20170561 -
Carbonate încredere 1,0
“Herit Sci (2021) 9:4 Page 9 of 15 Table 6 FTIR band assignment of calcite, tile dust and sticky rice powder (cm-1) Wavenumber Band assignment 3232symmetric stretching) ν3 (CO asymmetric stretching) and/or 2ν2 (O-C-O out-of-plane Calcite ~ 2”
Zhang 等 - 2021 - Effects of sticky rice addition on the properties DOI: 10.1186/s40494-020-00475-z -
Metal hydroxyl încredere 0,9
“Side peaks at 3232 and 3185 are part of the 3309 cm-1 series assigned as -Ti-OH stretching.”
Phlayrahan 等 - 2018 - Fe oxidation state in heat-treated basaltic blue s DOI: 10.1088/1742-6596/1144/1/012057
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