What absorbs at 528 cm⁻¹ in an FTIR spectrum?
A band near 528 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 528 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 |
|---|---|---|---|
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| Metal oxygen | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| N h | 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 |
|---|---|---|---|
| Fe3O4 | 528, 2358, 1673 | Metal oxygen, Methacrylate, Acetate | 1 |
| iron oxide nanoparticles | 528, 2972, 1628 | Metal oxygen, Methacrylate, Acetate | 1 |
| Co3O4 | 528, 1050, 450 | Metal oxygen, Carboxyl (COOH) | 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 528 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
-
Metal oxygen kumpiyansa 1.0
“Moreover, the two total follows: intensity of O 1s peak at 528.3 eV for MnFe 2O sample is decreased 4 due to the increase in covalently bonded metal oxygen atoms;”
Attestation in self-propagating combustion approach of spinel AFe2O4 (A=Co, Mg and Mn) complexes bearing mixed oxidation states: Magnetostructural properties DOI: 10.1016/j.apsusc.2016.04.177 -
N h kumpiyansa 1.0
“The 528 band is assigned to the strong coupling of the oxide cm-1 lattice in hydrated WO 3•nH 2O material [18].”
Martinez-Juarez 和 Diaz-Reyes - 2008 - A method for deposition of tungsten trioxide (WO3) DOI: 10.1117/12.815958 -
Hydroxyl (O-H) kumpiyansa 1.0
“874.1 P-O-P asymmetric stretching bond 792.0 P-O-P asymmetric stretching bond 577.1 (H-O-) P=O bond (strong absorption) acid phosphates 527.7 (H-O-) P=O bond (strong absorption) acid phosphates Table 2 FT-Raman wavenumbers and vibrations as”
Growth and characterization of calcium hydrogen phosphate dihydrate crystals from single diffusion gel technique DOI: 10.1002/crat.200900700 -
Acetate kumpiyansa 1.0
“The peaks at ~528.2 eV (observed only in DLC film) and at ~535.8 eV (labeled as a vertical bar) are related to the C=O k* bands, which were argued to indicate the presence of carbon oxide contaminants of carbonyl groups [22].”
Ray 等 - 2005 - Electronic structure and hardening mechanism of Si DOI: 10.1016/j.tsf.2004.11.152 -
Alkene (C=C) kumpiyansa 1.0
“The large peak from the NO stretching 1,350cm-1, vibration was observed at and the peak from the C=C stretching mode of the nitrate-bound form of the 1,528cm-1.”
Furutani 等 - 2013 - Development of a rapid Buffer-exchange system for DOI: 10.2142/biophysics.9.123 -
kumpiyansa 1.0
“http://pubs.acs.org/journal/acsodf Article cm-1 Ni-O fingerprint indicates bonds in the region for the sample.40,41 NiO nanosheet The absorption bands at 527.7 and”
Gawai 等 - 2022 - Microwave-Assisted Coprecipitation Synthesis and L DOI: 10.1021/acsomega.1c06179 -
Alkyl C-H kumpiyansa 1.0
“ous solution and stabilized by a capping agent like proteins secreted by The overall result of FTIR spectra indicated that different organic groups OH, C-H, C=O, C=C and C-O were present which act as a capping agent in iron oxide nanopartic”
Biosynthesized Iron Oxide Nanoparticles (Fe3O4 NPs) Mitigate Arsenic Toxicity in Rice Seedlings DOI: 10.3390/toxics9010002 -
kumpiyansa 0.9
“Text lists band at 528 as one of the five bands from sputtering, attributed to Co3O4.”
Cobalt Oxide Catalysts in the Form of Thin Films Prepared by Magnetron Sputtering on Stainless-Steel Meshes: Performance in Ethanol Oxidation DOI: 10.3390/catal9100806
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