Metal hydroxyl — FTIR-absorptions-toppe og tildelinger

Hurtigt svar

Metal hydroxyl tildeles normalt ved at lede efter en tilbagevendende klynge af karakteristiske toppe frem for et præcist lærebogsnummer. Tabellen nedenfor viser, hvor litteraturen oftest placerer denne gruppe i FTIR, rangeret efter akkumuleret evidens.

Karakteristiske FTIR-toppe for Metal hydroxyl

Viser de 30 bedst understøttede toppe ud af 143 i alt for Metal hydroxyl.

Spektrumlogik

En funktionel gruppetildeling bliver mere sikker, når flere forventede bånd optræder sammen. Brug denne side til at finde de bedst understøttede peaks, og bekræft derefter, at den samme prøve udviser et sammenhængende mønster snarere end et enkelt isoleret hit.

Anvendelse i virkeligheden

Disse sider er nyttige til analyse af ukendte materialer, topforklaring i rapporter, polymerfejlfinding og verifikation af, om en kandidatmaterialefamilie er kemisk plausibel.

Almindelige fejl

• Brug af én funktionel-gruppe-side som en komplet materialebedømmelse uden at kontrollere resten af spektret.
• Antager, at det stærkeste bånd altid er det mest diagnostiske.
• At glemme, at forarbejdning, tilsætningsstoffer, ældning og blandinger kan flytte eller udvide forventede toppe.

Verifikationsrådgivning

Brug DSC, GC-MS eller TGA, når flere materialefamilier deler lignende bånd, eller når blandings-effekter gør FTIR-tildelingen usikker.

Litteratur bag disse tildelinger

• 1300 cm⁻¹ tillid 1,0

  “Finally, absorption bands between 1300 and are assigned to the combination of stretch and bend vibrations of Si (or Al)-O framework and octahedral M-OH (M means metal element).”

  Cai 等 - 2007 - A Fourier transform infrared spectroscopic study o DOI: 10.1016/j.saa.2006.02.053
• 3390 cm⁻¹ tillid 1,0

  “LLM confirmed rule peak-group candidate”

  Dahham 等 - 2018 - Studies of ENR-25TiO2 Composites for Electronic M DOI: 10.1088/1742-6596/1019/1/012054
• 3455 cm⁻¹ tillid 1,0

  “LLM confirmed rule peak-group candidate”

  Dahham 等 - 2018 - Synthesis and structural studies of an epoxidized DOI: 10.1016/j.polymertesting.2017.11.005
• 2272 cm⁻¹ tillid 1,0

  “3(OH)2972 As-O vibration Asymmetric stretch of As-O AsO 2272 Al-OH vibration OH stretching for basic hydroxyl groups from Al-OH Al(OH) Al(III) 3 2O 2388”

  The effect of electrocoagulation (EC) on total arsenic, arsenite (As3+) and arsenate (As5+) species removal from model groundwater investigating toxicity and sludge characteristic DOI: 10.1007/s13201-022-01660-0
• 920 cm⁻¹ tillid 1,0

  “data.33-35 cm-1 The shoulder at 831 is due to the stretching cm-1 Al-O mode, whereas the band near 920 is tentatively Al-OH Alassigned as a mixed modes arising from stretch, O-Al Si-O-Si Si-O-Al vibration, and and stretching”

  Fali 等 - 2021 - Nanoscale Spectroscopy of Dielectric Properties of DOI: 10.1021/acsphotonics.0c00951
• 912 cm⁻¹ tillid 1,0

  “Absorption bands cm-1 at 911.6, 912.5, 910.6, 912.2, 910.6 and 911.8 assigned to the Al-OH vibrations [40].”

  Unique Halloysite Nanotubes–Polyvinyl Alcohol– Polyvinylpyrrolidone Composite Complemented with Physico–Chemical Characterization DOI: 10.3390/polym9060207
• 471 cm⁻¹ tillid 1,0

  “cm-1 1635 3433 and 3749 Ammoand 2018), then the wavenumber of 470.63 cm-1 denoted as the Al-Al-OH vibrations nium ions have inserted inside the layer of ben532.35 cm-1 due to has bet- (Zaher MS et al., 2018).”

  Hakim 等 - 2023 - Ammonium-Assisted Intercalation of Java Bentonite DOI: 10.12911/22998993/156665
• 907 cm⁻¹ tillid 1,0

  “The peak at 907 observed only in HNT FTIR spectra is attributed to Al-OH bonding which does not appear in CTS (due to absence of Al) and also disappeared in CTS-Si/HNT nanocomposite due to the breaking of Al-OH bonding after when CTS-Si is”

  Synthesis and Optimization of Superhydrophilic-Superoleophobic Chitosan–Silica/HNT Nanocomposite Coating for Oil–Water Separation Using Response Surface Methodology DOI: 10.3390/nano12203673