C c single bond — FTIR-absorptions-toppe og tildelinger

Hurtigt svar

C c single bond 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 C c single bond

Viser de 30 bedst understøttede toppe ud af 818 i alt for C c single bond.

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

• 1610 cm⁻¹ tillid 1,0

  “LLM confirmed rule peak-group candidate”

  Arjunan 等 - 2012 - Quantum chemical studies and vibrational analysis DOI: 10.1016/j.saa.2012.08.053
• 1468 cm⁻¹ tillid 1,0

  “In the DCNP, the bands observed in IR at 1468, 1340, 1304, and in IR and 1348, 1569cm(cid:2)1 cm(cid:2)1 1635 and 1309 and 1183 has been assigned to C-C stretching and in in Raman for DCNP and the band observed 1266cm(cid:2)1”

  Arivazhagan 和 Rexalin - 2013 - Vibrational spectra, UV-vis spectral analysis and DOI: 10.1016/j.saa.2013.01.029
• 1098 cm⁻¹ tillid 1,0

  “However, the peak at 1098 cm-1 C-C-O stretch69) be used, if available.”

  Ault 和 Pomeroy - 2012 - Quantitative Investigations of Biodiesel Fuel Usin DOI: 10.1021/ed101097n
• 890 cm⁻¹ tillid 1,0

  “2 cm-1: jugated ketone (phenyl-carbonyl) in lignin, 1160 C-O-C asymmetrical stretching in cellulose and hemicm-1: cm-1: celluloses, 1030 C-O, C=C, and C-C-O stretching in wood, and 890 glycosidic linkage.”

  Physicochemical characterisation of barley straw treated with sodium hydroxide or urea and its digestibility and in vitro fermentability in ruminants DOI: 10.1038/s41598-022-24738-w
• 1412 cm⁻¹ tillid 1,0

  “The 1635.78cm-1 C]O peak of shows carbonyl group and 3.5 1411.89cm-1 C-C shows stretching.”

  Bawazeer 等 - 2021 - Green synthesis of silver nanoparticles using Trop DOI: 10.1515/gps-2021-0003
• 1412 cm⁻¹ tillid 1,0

  “The peak This is a chromophoric assay in which change in cm-1 of 1658.78 shows carbonyl group and peak absorbance is indicated by change in color and cm-1 at 1411.89 shows C-C stretching.”

  Bawazeer 等 - 2021 - Synthesis, Characterization and Bioactivity Profil DOI: 10.22207/JPAM.15.2.11
• 3105 cm⁻¹ tillid 1,0

  “al.29 band at 3105 reported by Pace et who assigned it as the combination band of the C-C 47 48 cm-1) cm-1).”

  Blue-Shifted Hydrogen Bonding in the Gas Phase CH/D3CN●●●HCCl3 Complexes DOI: 10.1021/acs.jpca.8b12200
• 500 cm⁻¹ tillid 1,0

  “1000 C-Ag C-C Plasmon peak 500 Si-O C=O”

  Synthesis and Characterization of Silicon Nanowires by Electroless Etching DOI: 10.1007/s11665-018-3179-z