Carbonyl (C=O) — FTIR-absorptions-toppe og tildelinger

Hurtigt svar

Carbonyl (C=O) 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 Carbonyl (C=O)

Viser de 30 bedst understøttede toppe ud af 1083 i alt for Carbonyl (C=O).

Mulige materialer

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

• 1735 cm⁻¹ tillid 1,0

  “The new peak appears cm-1 at 1735 which indicates the presence of a C=O bond from carboxylic acid.”

  Synthesis and Physical Properties Characterization of Montmorillonite-modified Carbon Nanotubes Filler DOI: 10.1088/1757-899X/546/4/042004
• 1731 cm⁻¹ tillid 1,0

  “LLM confirmed rule peak-group candidate”

  Grafting of Oleic Acid On Cyclic Natural Rubber Resiprene-35 Using Dicumyl Peroxide Initiator and Divinylbenzene Compatibilizers For Paint Binder In Polyamide Thermoplastics DOI: 10.13005/ojc/350119
• 1672 cm⁻¹ tillid 1,0

  “The most intense bands were the carbonyl peak at 1672 cm-1 and the benzene ring stretching at 1514, 1477, and 1392 cm-1.”

  FTIR Approaches for Diuron Determination in Commercial Pesticide Formulations DOI: 10.1021/jf050268f
• 747 cm⁻¹ tillid 1,0

  “Therefore, the ging band appears between 850 and regions, even though only one carbonyl group is present, prob746cm-1 747cm-1 in the infrared and in Raman is band at ably due to Fermi resonance.”

  Fourier transform infrared and Raman spectral assignments and analysis of 7-amino-4-trifluoromethylcoumarin DOI: 10.1016/j.saa.2006.09.044
• 2137 cm⁻¹ tillid 1,0

  “The peak value at 2137, and 3391 The presence of alkyl, benzyl, methyl, 500 nm showed a characteristic wavelength for the synthesis and carbonyl groups in the molecule and the polar groups like -OH -NH of gold nanoparticles to increase in a”

  Biogenic Synthesis of Gold Nanoparticle from Enicostema axillare and Their In Vitro Cytotoxicity Study Against MCF-7 Cell Line DOI: 10.1007/s12668-019-00656-6
• 1723 cm⁻¹ tillid 1,0

  “The characteristics sharp peak at 1723 is attributed to stretching vibration of carbonyl (-C=O) group from GMSG/VMSG [46, 47], the intensity of which increases with the increase of GMSG/VMSG contents in the membrane”

  Novel Silica Functionalized Monosodium Glutamate/PVA Cross-linked Membranes for Alkali Recovery by Diffusion Dialysis DOI: 10.21203/rs.3.rs-283846/v1
• 1695 cm⁻¹ tillid 1,0

  “LLM confirmed rule peak-group candidate”

  Modified Dioscorea hispida starch-based hydrogels and their in-vitro cytotoxicity study on small intestine cell line (FHS-74 Int) DOI: 10.1016/j.ijbiomac.2017.10.125
• 1746 cm⁻¹ tillid 1,0

  “LLM confirmed rule peak-group candidate”

  Quantitative Investigations of Biodiesel Fuel Using Infrared Spectroscopy: An Instrumental Analysis Experiment for Undergraduate Chemistry Students DOI: 10.1021/ed101097n