Carbon dioxide — FTIR-absorptions-toppe og tildelinger

Hurtigt svar

Carbon dioxide 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 Carbon dioxide

Viser de 30 bedst understøttede toppe ud af 156 i alt for Carbon dioxide.

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

• 2358 cm⁻¹ tillid 1,0

  “Broad [20, 35] vibration 2358 vibrational CO Carbon dioxide Sharp”

  Aziz 等 - 2023 - Water remediation capability of cubic-phase CdS na DOI: 10.15251/DJNB.2023.181.203
• 1000 cm⁻¹ tillid 1,0

  “The deformation band of C=O at around 1000 and cm-1 absorption peaks observed ordinary between 2300 and 2400 due to adsorbed CO 2”

  Structural and magnetic properties of Co-doped ZnO thin films grown by ultrasonic spray pyrolysis method DOI: 10.1016/j.spmi.2016.11.069
• 2363 cm⁻¹ tillid 1,0

  “The band at 2363 is due to cm-1 CO2, which is generally observed in IR spectra.”

  Choubey 等 - 2007 - Influence of doping on OH absorption in LiNbO3 cry DOI: 10.1002/crat.200610894
• 797 cm⁻¹ tillid 1,0

  “Inthespectralregion1250-400cm-1ofsoilsfromintermediateBh the spectra of horizon Bh and Bhs, with the exception of the peak at cm-1, 1160 andBhshorizons(Fig.1),wherethemineralphasesKOandTOappear, which disappears due to the very low content”

  Clabel 等 - 2020 - Organo-mineral associations in a Spodosol from nor DOI: 10.1016/j.geodrs.2020.e00303
• 1100 cm⁻¹ tillid 1,0

  “at the highest CO partial pressure, P(CO 2)=760Torr, on the four 2 investigatedsamples.Likewise,Fig.4Bsummarizestheadsorption isothermsbuiltupbyplottingthetotalintegratedabsorbance(normalized by weight and surface area) data for the spectra”

  Effect of gallia doping on the acid⠍base and redox properties of ceria DOI: 10.1016/j.apcata.2010.08.050
• 3708 cm⁻¹ tillid 1,0

  “cm-1 N3700 the absorption of which extends at frequency and thus overlapswiththe3708cm-1band.However,acloseinspectionofour spectra revealed that CO 2-rich minerals (for example haüyne and lazurite, Bellatreccia et al., 2009) systematically”

  FTIR microspectroscopy and SIMS study of water-poor cordierite from El Hoyazo, Spain: Application to mineral and melt devolatilization DOI: 10.1016/j.lithos.2009.05.031
• 2200 cm⁻¹ tillid 1,0

  “Normalized intensity is the integrated area of ing lost their labile compounds prior to sampling, as was 2200cm-1 the CO2 peak from 2400 to normalized to weight of the the case with the analysed POM having been sampled seven sample.”

  Demyan 等 - 2013 - Combining a coupled FTIR-EGA system and in situ DR DOI: 10.5194/bg-10-2897-2013
• 1387 cm⁻¹ tillid 1,0

  “Figure 5 depicts the temperature stability of the adsorbed species, cm-1 sample is heated above 500 K, the peaks at 1387 and 1362 desorption of carbon dioxide, and peak area of the adsorbed have disappeared and two new peaks appear at 1400”

  Durand 等 - 2010 - Reaction of Formic Acid over Amorphous Manganese O DOI: 10.1021/jp104629j