What absorbs at 3463 cm⁻¹ in an FTIR spectrum?
A band near 3463 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 7 cited sources
Ātra atbilde
A band near 3463 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.
Iespējamie funkcionālo grupu piešķīrumi
| Funkcionālā grupa | Atbalstošie fakti | Citētie avoti | Augstākā pārliecība |
|---|---|---|---|
| Hydroxyl (O-H) | 4 | 4 | 1,0 |
| Water (H2O) | 3 | 3 | 1,0 |
| N h | 2 | 2 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
Rangs atspoguļo uzkrātos literatūras pierādījumus, nevis vienu autoritatīvu noteikumu. Vienmēr apstipriniet atbilstoši parauga kontekstam.
Iespējamie materiāli
| Materiāls | Atbalstošie pīķi | Pārklājošās grupas | Citētie avoti |
|---|---|---|---|
| ZnO | 3463, 1400, 3430 | Hydroxyl (O-H) | 1 |
| polyethylene | 3463, 1737, 1720 | Hydroxyl (O-H) | 1 |
| ZnO nanoparticles | 3463, 1219, 1726 | Hydroxyl (O-H) | 1 |
| PEG | 3463, 1650, 1342 | Hydroxyl (O-H) | 1 |
Materiāli tiek parādīti tikai tad, ja šo joslu un vismaz vienu papildu raksturīgo pīķi atbalsta tā pati literatūras kopa.
Spektra loģika
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 3463 cm⁻¹ is usually not enough for material identification by itself.
Reālās pasaules izmantošana
Šāda veida vaicājums ir izplatīts polimēru identificēšanā, nezināmas plastmasas skrīningā, kvalitātes kontroles problēmu risināšanā, pārstrādāto materiālu pārbaudē un ar literatūru pamatotā pīķu piešķīruma pārskatā.
Biežākās kļūdas
- Vienas izolētas joslas uzskatīšana par materiāla pierādījumu, nepārbaudot vismaz vienu vai divus atbalsta pīķus.
- Ignorējot pārklāšanos: vairākas funkcionālās grupas var dot ieguldījumu tuvu tam pašam viļņa skaitlim.
- Izlaist validāciju, ja piedevas, maisījumi, oksidācija vai piesārņojums var izkropļot spektru.
Verifikācijas padoms
Ja joprojām pastāv neskaidrība, apstipriniet hipotēzi ar DSC, GC-MS vai TGA, īpaši maisījumiem, noārdītiem paraugiem un pildītiem polimēriem.
Literatūra aiz šiem piešķīrumiem
-
Hydroxyl (O-H) pārliecība 1,0
“The broad band that appear at 3463 corresponding to O-H stretching could be attributed to the 17 presence of moisture in the sample [9].”
Mohammed 等 - 2018 - Effect of heat-treatment on the magnetic and optic DOI: 10.1088/2053-1591/aad1e5 -
Water (H2O) pārliecība 1,0
“cm-1 Absorption peak centered at 3463 and 1636 are attributed to stretching and bending vibration of H 2O 40 caused by adsorbed water or humidity which shows that the surface of the samples contain active O-H groups 41 [39].”
Rekaby 等 - 2020 - Influence of cobalt addition and calcination tempe DOI: 10.1088/2053-1591/ab65de -
Hydroxyl (O-H) pārliecība 1,0
“For the spectrum of PEG, the spectral band appeared at 3463 for cm-1 cm-1 O-H stretching vibrations, 2889 for C-H stretching vibrations, and 1469 and 1342 for C-H cm-1 bending vibrations.”
Green Synthesis and Characterization of Silver/Chitosan/Polyethylene Glycol Nanocomposites DOI: 10.3390/ijms12084872 -
Hydroxyl (O-H) pārliecība 1,0
“Alternatively, the environment around Thr118 in MB is similar cm-1, to rhodopsin because of a similar O-H vibrational frequency at 3463 which originates from Thr118 that is exhibited in the unphotolized state (Figure S7).”
Spectral Tuning Mechanism of Primate Blue-sensitive Visual Pigment Elucidated by FTIR Spectroscopy DOI: 10.1038/s41598-017-05177-4 -
pārliecība 1,0
“The bending vibration around 3463.08 1641 corresponds to N-H.”
Kawish 等 - 2020 - Enhancement in Oral Absorption of Ceftriaxone by H DOI: 10.3390/pharmaceutics12060492 -
Hydroxyl (O-H) pārliecība 1,0
“In the spectrum of chitosan (Figure cm-1 where is crystal size, k is constant (0.94), nm 3(b)), the broad peak at 3463 is due to the -OH/-NH 𝜆 = 0.154 𝐷 2 cm-1 represents the wavelength of X-ray radiation, β is the full width stretching vib”
Nhu Thanh Nguyen 等 - 2020 - In Situ Synthesis and Characterization of ZnOChit DOI: 10.1155/2020/3892694 -
Water (H2O) pārliecība 1,0
“The broad peak at 3463 cm-1 was the stretching stretching modes of OH/NH of the organic matrix or the adsorbed water molecules as modes of OH/NH of the organic matrix or the adsorbed water molecules as reported [56-”
Wilson 和 Pampadykandathil - 2023 - Novel Bone Void Filling Cement Compositions Based DOI: 10.3390/bioengineering10070752
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