Quinone — FTIR-absorptions-toppe og tildelinger

Hurtigt svar

Quinone 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 Quinone

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

• 1246 cm⁻¹ tillid 1,0

  “cm-1 cm-1 The absorption peaks at 1246 and 1296 are attributed to the C-N stretching vibration of cm-1 benzene ring and quinone ring, respectively.”

  Polymer anode used in hydrometallurgy: Anodic behaviour of PANI/CeO 2 /WC anode from sulfate electrolytes DOI: 10.1016/j.hydromet.2018.01.020
• 1464 cm⁻¹ tillid 1,0

  “The change in degree of oxidation may also lead main peaks consistent with quinone and benzene ring deforma1564.7cm-1 1464.0cm-1 to change in electrical conductivity of polyaniline which again tions are observed at and [15,36].”

  Raigaonkar 等 - 2011 - Structural and spectral investigations of anthrace DOI: 10.1016/j.synthmet.2010.12.002
• 1570 cm⁻¹ tillid 1,0

  “cm-1 1490, 1570 The main peaks at 1570 and 1490 can be associated with C=N and C=C cm-1 stretching vibrations of quinone and benzene rings, respectively.”

  Synthesis of Uniform Polyaniline Nanofibers through Interfacial Polymerization DOI: 10.3390/ma5081487
• 1657 cm⁻¹ tillid 1,0

  “[35] reported that spectral lines of biochar derived from corn waste at wavenumber 1617 cm-1 correspond to the vibration of the aromatic ring, and those at 1657 cm-1 Materials 2022, 15, x FOR PEER REVIEW 10 of 14 correspond to the vibration”

  Fristak 等 - 2022 - Physicochemical Characterization of Cherry Pits-De DOI: 10.3390/ma15020408
• 1176 cm⁻¹ tillid 1,0

  “H 545 BendingofC S Ostretchingvibrations 1176;1109;1027 O 968 aromaticsulfonicacid corresponding to carbonyl groups in both spectra exclude the presence of quinone moieties and support the formation of only”

  Hou 等 - 2012 - Sulfonated polyphenyl ether by electropolymerizati DOI: 10.1016/j.electacta.2012.07.082
• 3019 cm⁻¹ tillid 1,0

  “The three strong peaks at 3019 2782 and 2465 correspond to symmetric could be attributed to a highly conjugated CO in quinone configuration.”

  A Room Temperature Gas Sensor Based on Sulfonated SWCNTs for the Detection of NO and NO2 DOI: 10.3390/s19051116
• 1621 cm⁻¹ tillid 1,0

  “Melanin has also the characteristic absorption bands at 1621(1622) and corresponds to ring structures typical for melanin involved pyrrone, (cid:74)-thiopyrrone, indole, and quinone [3,13].”

  Characterization of chitin and its complexes extracted from natural raw sources DOI: 10.1063/1.4964577
• 1700 cm⁻¹ tillid 1,0

  “intense unscaled band of isolated ubiquinone computed at 1700 This new band is caused by the coupling of antisymmetric elongation of the quinone C=O bonds with the rocking of the OH bond of the QH2 molecule.”

  Identification of a Ubiquinone–Ubiquinol Quinhydrone Complex in Bacterial Photosynthetic Membranes and Isolated Reaction Centers by Time-Resolved Infrared Spectroscopy DOI: 10.3390/ijms24065233