What absorbs at 455 cm⁻¹ in an FTIR spectrum?
A band near 455 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
Snabbt svar
A band near 455 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.
Möjliga identifieringar av funktionella grupper
| Funktionell grupp | Stödjande fakta | Citerade källor | Högsta förtroende |
|---|---|---|---|
| Metal oxygen | 6 | 6 | 1,0 |
| Silicon-oxygen (Si-O) | 3 | 3 | 1,0 |
| Siloxane (Si-O-Si) | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Carbon dioxide | 1 | 1 | 1,0 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Möjliga material
| Material | Stödjande toppar | Överlappande grupper | Citerade källor |
|---|---|---|---|
| TiO2 | 455, 1700, 1093 | Metal oxygen, Hydroxyl (O-H) | 1 |
| TiO2 nanoparticles | 455, 1700, 1535 | Hydroxyl (O-H), Metal oxygen | 1 |
| silica | 455, 1100, 1080 | Silicon-oxygen (Si-O), Hydroxyl (O-H), Siloxane (Si-O-Si) | 1 |
Material visas endast när samma litteraturpool stöder detta band och minst en ytterligare karakteristisk topp.
Spektrumlogik
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 455 cm⁻¹ is usually not enough for material identification by itself.
Användning i verkligheten
Denna typ av fråga är vanlig inom polymeridentifiering, screening av okänd plast, felsökning av kvalitetskontroll, verifiering av återvunnet material och litteraturstödd toppidentifieringsgranskning.
Vanliga misstag
- Behandla ett isolerat band som bevis på ett material utan att kontrollera minst en eller två stödjande toppar.
- Ignorerar överlapp: flera funktionella grupper kan bidra nära samma vågtal.
- Hoppa över validering när tillsatser, blandningar, oxidation eller föroreningar kan förvränga spektrat.
Verifieringsråd
När oklarhet kvarstår, validera hypotesen med DSC, GC-MS eller TGA, särskilt för blandningar, nedbrutna prover och fyllda polymerer.
Litteratur bakom dessa identifieringar
-
förtroende 1,0
“2 30 eV.36 to give rise to a peak at 455 A significant band ascribed to a Ti-O-C bond was observed at 31 32”
Surface Grafting of Ru(II) Diazonium-Based Sensitizers on Metal Oxides Enhances Alkaline Stability for Solar Energy Conversion DOI: 10.1021/acsami.7b16641 -
Metal oxygen förtroende 1,0
“assigned to apical oxygen vibrations”
Khan 等 - 2004 - Effects of post-annealing on the infrared active p DOI: 10.1016/j.physc.2004.04.029 -
förtroende 1,0
“The disordered natureof the rutile lattice and the signalwith ag value of 1.98 inthe ESR spectrum of SnO fluoride enormous oxygen vacancies created due to ion doping were evident from the broad bands observed at 455, 588, and cm(cid:1)1”
Kumar 等 - 2011 - Optical and Photocatalytic Properties of Heavily F DOI: 10.1021/ic2003436 -
Silicon-oxygen (Si-O) förtroende 1,0
“The pumice XRD pattern coated with and ZrO nanoparticles shows the main and derivative elements of TiO 2 2 pumice, including pyroxene, magnetite feldspar mica, and SiO 2.FTIR spectra for TiO and ZrO nanoparticles showed that the peaks at 45”
Efficiency of the catalytic ozonation processes using nanoparticles deposited on pumice in the remov DOI: 10.1080/03067319.2021.1903453 -
Metal oxygen förtroende 1,0
“LLM confirmed rule peak-group candidate”
Wang 等 - 2018 - Coloration and Decoloration of Textiles Using a Ti DOI: 10.1007/s12221-018-1134-0 -
Hydroxyl (O-H) förtroende 1,0
“Fritsch et al.: OH stretching vibrations in serpentines 455 2M 3.2.2 OH stretching modes in antigorite inner OH in an Mg environment.”
Fritsch 等 - 2021 - Structural, textural, and chemical controls on the DOI: 10.5194/ejm-33-447-2021 -
förtroende 1,0
“The low frequency contributions (~455 cm-1) (~455 and ~800 are bending modes of the Si-O bonds, whereas the high-intensity and ~800 cm-1) are bending modes of the Si-O bonds, whereas the high-intensity band at and ~800 cm-1) are bending mod”
Len 等 - 2021 - Physicochemical Characterization and Drug Release DOI: 10.3390/ijms22179197 -
Metal oxygen förtroende 1,0
“4 cm-1 widening in the 1150-1000 region due to overlapping of stretching vibrations of spectively), 576 cm-1 (vibrations of double-ring external linkage), and 455 cm-1 (bending functional Si/Al-O and stretching vibrations of C-C/C-O-C pecti”
Novel Biocomposite Films Based on High Methoxyl Pectin Reinforced with Zeolite Y for Food Packaging Applications DOI: 10.3390/foods11030360
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