C#c — FTIR-absorptions-toppe og tildelinger

Hurtigt svar

C#c 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

Viser de 30 bedst understøttede toppe ud af 72 i alt for C#c.

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

• 2045 cm⁻¹ tillid 1,0

  “The peak at 2368.59 2222.00 of antioxidant potential of tested cm-1 and 2044.54 show C≡C stretching.”

  Bawazeer 等 - 2021 - Synthesis, Characterization and Bioactivity Profil DOI: 10.22207/JPAM.15.2.11
• 1443 cm⁻¹ tillid 1,0

  “LLM confirmed rule peak-group candidate”

  Characterization of short-length multi-walled carbon nanotubes and cytotoxicity on MDA-MB-231 and HUVEC cell lines DOI: 10.1007/s42823-019-00081-5
• 1451 cm⁻¹ tillid 1,0

  “1450.86cm-1 1541.57, related to be alkynes (monosubstituted) group, σ alkanes group, carboxylic acid dimer, hydroxyl aryl ketones, nitro compounds, tertiary ammonium ions.”

  Novel approach to synthesis silver nanoparticles using plant pathogenic fungi, Puccinia graminis DOI: 10.1016/j.matlet.2012.04.103
• 2300 cm⁻¹ tillid 1,0

  “LLM confirmed rule peak-group candidate”

  Kundu 等 - 2018 - Synthesis and characterization of iron and copper DOI: 10.1063/1.5051300
• 2123 cm⁻¹ tillid 1,0

  “cm-1 cm-1 Weak and broad peak at 2123.44 and 2123.58 were observed due to C≡C stretching of cm-1 monosubstituted alkynes present in EFY starch.”

  Nagar 等 - 2019 - Influence of xanthan and agar-agar on thermo-funct DOI: 10.1016/j.ijbiomac.2019.06.133
• 2879 cm⁻¹ tillid 1,0

  “cm-1 and 2611.01 >3000 (Medium) Alkane (C-H Stretching) 2715.39 2879.43cm-1 and2868.32cm-1 ±2860cm-1 Alkane(C-HStretching) (Medium) 2210.28cm-1 ±2200cm-1 Alkyne(C≡CStretching) (Medium) cm-1 cm-1 2935.05 ±2935 (Medium) Alkane (C-H Stretching”

  Validation of the Developed Zero-Order Infrared Spectrophotometry Method for Qualitative and Quantitative Analyses of Tranexamic Acid in Marketed Tablets DOI: 10.3390/molecules26226985
• 2920 cm⁻¹ tillid 1,0

  “Furthermore, the peak at 2920.32 is ascribed to C-H cm-1 which is likely to correspond to C≡C stretch of the alkyl group, the peak around 2360.95 cm-1 from alkyne and the peak at 1635.69 suggested conjugation effects of C=O stretching of ca”

  Oladipo 等 - 2020 - Characterization and biomedical application of phy DOI: 10.1088/1757-899X/805/1/012021
• 3261 cm⁻¹ tillid 1,0

  “The absorption peaks of FTIR are contained of cm-1, cm-1, cm-1, cm-1 3261 2136 1635 and 1230 peaks that are assigned and fitted to C≡C, O-H, C=C, and C-O-H/O-H, respectively [20,21].”

  Surface Enhanced Raman Scattering in Graphene Quantum Dots Grown via Electrochemical Process DOI: 10.3390/molecules26185484